### test parallel_tutorial
     fetch -o - http://pi.dk/3 ) > install.sh
  $ sha1sum install.sh
  12345678 51621b7f 1ee103c0 0783aae4 ef9889f8
  $ md5sum install.sh
  62eada78 703b5500 241b8e50 baf62758
  $ sha512sum install.sh
  160d3159 9480cf5c a101512f 150b7ac0 206a65dc 86f2bb6b bdf1a2bc 96bc6d06
  7f8237c2 0964b67f bccf8a93 332528fa 11e5ab43 2a6226a6 ceb197ab 7f03c061
  $ bash install.sh
  parallel -k echo ::: A B C > abc-file
  parallel -k echo ::: D E F > def-file
  perl -e 'printf "A\0B\0C\0"' > abc0-file
  perl -e 'printf "A_B_C_"' > abc_-file
  perl -e 'printf "f1\tf2\nA\tB\nC\tD\n"' > tsv-file.tsv
  perl -e 'for(1..8){print "$_\n"}' > num8
  perl -e 'for(1..30000){print "$_\n"}' > num30000
  perl -e 'for(1..1000000){print "$_\n"}' > num1000000
  (echo %head1; echo %head2; \
sleep .3
   perl -e 'for(1..10){print "$_\n"}') > num_%header
  perl -e 'print "HHHHAAABBBCCC"' > fixedlen
  parallel echo ::: A B C
  parallel -a abc-file echo
  cat abc-file | parallel echo
  parallel echo ::: A B C ::: D E F
A D
A E
A F
B D
B E
B F
C D
C E
C F
  parallel -a abc-file -a def-file echo
A D
A E
A F
B D
B E
B F
C D
C E
C F
  cat abc-file | parallel -a - -a def-file echo
A D
A E
A F
B D
B E
B F
C D
C E
C F
  cat abc-file | parallel echo :::: - def-file
A D
A E
A F
B D
B E
B F
C D
C E
C F
  parallel echo ::: A B C :::: def-file
A D
A E
A F
B D
B E
B F
C D
C E
C F
  parallel --link echo ::: A B C ::: D E F
A D
B E
C F
  parallel --link echo ::: A B C D E ::: F G
A F
B G
C F
D G
E F
  parallel echo :::: abc-file :::+ G H I :::: def-file
A G D
A G E
A G F
B H D
B H E
B H F
C I D
C I E
C I F
  parallel echo :::: abc-file ::: G H I ::::+ def-file
A G D
A H E
A I F
B G D
B H E
B I F
C G D
C H E
C I F
  parallel echo ::: A B C D E :::+ F G
A F
B G
  parallel --arg-sep ,, echo ,, A B C :::: def-file
A D
A E
A F
B D
B E
B F
C D
C E
C F
  parallel --arg-file-sep // echo ::: A B C // def-file
A D
A E
A F
B D
B E
B F
C D
C E
C F
  parallel -d _ echo :::: abc_-file
  parallel -d '\0' echo :::: abc0-file
  parallel -E stop echo ::: A B stop C D
  (echo 1; echo; echo 2) | parallel --no-run-if-empty echo
9
  parallel ::: ls 'echo foo' pwd
abc-file
abc0-file
abc_-file
def-file
fixedlen
num1000000
num30000
num8
outdir
tsv-file.tsv
foo
/TMP
  my_func() {
    echo in my_func $1
  }
  export -f my_func
  parallel my_func ::: 1 2 3
in my_func 1
in my_func 2
in my_func 3
  parallel echo ::: A/B.C
A/B.C
  parallel echo {} ::: A/B.C
A/B.C
  parallel echo {.} ::: A/B.C
A/B
  parallel echo {/} ::: A/B.C
B.C
  parallel echo {//} ::: A/B.C
  parallel echo {/.} ::: A/B.C
  parallel echo {#} ::: A B C
9
  parallel -j 2 echo {%} ::: A B C
9
  parallel -I ,, echo ,, ::: A/B.C
A/B.C
  parallel --extensionreplace ,, echo ,, ::: A/B.C
A/B
  parallel --basenamereplace ,, echo ,, ::: A/B.C
B.C
  parallel --dirnamereplace ,, echo ,, ::: A/B.C
  parallel --basenameextensionreplace ,, echo ,, ::: A/B.C
  parallel --seqreplace ,, echo ,, ::: A B C
9
  parallel -j2 --slotreplace ,, echo ,, ::: A B C
9
  parallel echo '{= s:\.[^.]+$::;s:\.[^.]+$::; =}' ::: foo.tar.gz
foo
  parallel echo Job {#} of {= '$_=total_jobs()' =} ::: {1..5}
Job 1 of 5
Job 2 of 5
Job 3 of 5
Job 4 of 5
Job 5 of 5
  parallel echo {} shell quoted is {= '$_=Q($_)' =} ::: '*/!#$'
*/!#$ shell quoted is '*/!#$'
  parallel echo {= 'if($_==3) { skip() }' =} ::: {1..5}
9
  parallel echo {= 'if($arg[1]==$arg[2]) { skip() }' =} \
    ::: {1..3} ::: {1..3}
1 2
1 3
2 1
2 3
3 1
3 2
  parallel --parens ,,,, echo ',, s:\.[^.]+$::;s:\.[^.]+$::; ,,' \
    ::: foo.tar.gz
foo
  parallel --rpl '.. s:\.[^.]+$::;s:\.[^.]+$::;' echo '..' \
    ::: foo.tar.gz
foo
  parallel --rpl '{..} s:\.[^.]+$::;s:\.[^.]+$::;' echo '{..}'
    ::: foo.tar.gz
/usr/bin/bash: line 2: :::: command not found
  parallel --rpl '{%(.+?)} s/$$1$//;' echo {%.tar.gz}.zip ::: foo.tar.gz
foo.zip
  parallel --rpl '{/(.+?)/(.*?)} s/$$1/$$2/;' echo {/tar.gz/zip} \
    ::: foo.tar.gz
foo.zip
  --rpl '{} '
  --rpl '{#} $_=$job->seq()'
  --rpl '{%} $_=$job->slot()'
  --rpl '{/} s:.*/::'
  --rpl '{//} $Global::use{"File::Basename"} ||=
           eval "use File::Basename; 1;"; $_ = dirname($_);'
  --rpl '{/.} s:.*/::; s:\.[^/.]+$::;'
  --rpl '{.} s:\.[^/.]+$::'
/usr/bin/bash: line 1: --rpl: command not found
/usr/bin/bash: line 2: --rpl: command not found
/usr/bin/bash: line 3: --rpl: command not found
/usr/bin/bash: line 4: --rpl: command not found
/usr/bin/bash: line 6: --rpl: command not found
/usr/bin/bash: line 7: --rpl: command not found
/usr/bin/bash: line 8: --rpl: command not found
  parallel echo {1} and {2} ::: A B ::: C D
A and C
A and D
B and C
B and D
  parallel echo /={1/} //={1//} /.={1/.} .={1.} ::: A/B.C D/E.F
/=B.C //=A /.=B .=A/B
/=E.F //=D /.=E .=D/E
  parallel echo 1={1} 2={2} 3={3} -1={-1} -2={-2} -3={-3} \
    ::: A B ::: C D ::: E F
1=A 2=C 3=E -1=E -2=C -3=A
1=A 2=C 3=F -1=F -2=C -3=A
1=A 2=D 3=E -1=E -2=D -3=A
1=A 2=D 3=F -1=F -2=D -3=A
1=B 2=C 3=E -1=E -2=C -3=B
1=B 2=C 3=F -1=F -2=C -3=B
1=B 2=D 3=E -1=E -2=D -3=B
1=B 2=D 3=F -1=F -2=D -3=B
  parallel echo '{=2 s:\.[^.]+$::;s:\.[^.]+$::; =} {1}' \
    ::: bar ::: foo.tar.gz
foo bar
  parallel --rpl '{..} s:\.[^.]+$::;s:\.[^.]+$::;' echo '{2..} {1}' \
    ::: bar ::: foo.tar.gz
foo bar
  parallel --colsep '\t' echo 1={1} 2={2} :::: tsv-file.tsv
1=f1 2=f2
1=A 2=B
1=C 2=D
  parallel --header : echo f1={f1} f2={f2} ::: f1 A B ::: f2 C D
f1=A f2=C
f1=A f2=D
f1=B f2=C
f1=B f2=D
  parallel --header : --colsep '\t' echo f1={f1} f2={f2} \
    :::: tsv-file.tsv
f1=A f2=B
f1=C f2=D
  parallel --plus echo {} ::: dir/sub/file.ex1.ex2.ex3
  parallel --plus echo {+/}/{/} ::: dir/sub/file.ex1.ex2.ex3
  parallel --plus echo {.}.{+.} ::: dir/sub/file.ex1.ex2.ex3
  parallel --plus echo {+/}/{/.}.{+.} ::: dir/sub/file.ex1.ex2.ex3
  parallel --plus echo {..}.{+..} ::: dir/sub/file.ex1.ex2.ex3
  parallel --plus echo {+/}/{/..}.{+..} ::: dir/sub/file.ex1.ex2.ex3
  parallel --plus echo {...}.{+...} ::: dir/sub/file.ex1.ex2.ex3
  parallel --plus echo {+/}/{/...}.{+...} ::: dir/sub/file.ex1.ex2.ex3
dir/sub/file.ex1.ex2.ex3
  parallel --plus echo Job {#} of {##} ::: {1..5}
Job 1 of 5
Job 2 of 5
Job 3 of 5
Job 4 of 5
Job 5 of 5
  unset myvar
  echo ${myvar:-myval}
  parallel --plus echo {:-myval} ::: "$myvar"
myval
  myvar=abcAaAdef
  echo ${myvar:2}
  parallel --plus echo {:2} ::: "$myvar"
cAaAdef
  echo ${myvar:2:3}
  parallel --plus echo {:2:3} ::: "$myvar"
  echo ${myvar#bc}
  parallel --plus echo {#bc} ::: "$myvar"
  echo ${myvar#abc}
  parallel --plus echo {#abc} ::: "$myvar"
  echo ${myvar%de}
  parallel --plus echo {%de} ::: "$myvar"
  echo ${myvar%def}
  parallel --plus echo {%def} ::: "$myvar"
  echo ${myvar/def/ghi}
  parallel --plus echo {/def/ghi} ::: "$myvar"
  echo ${myvar^a}
  parallel --plus echo {^a} ::: "$myvar"
  echo ${myvar^^a}
  parallel --plus echo {^^a} ::: "$myvar"
  myvar=AbcAaAdef
  echo ${myvar,A}
  parallel --plus echo '{,A}' ::: "$myvar"
  echo ${myvar,,A}
  parallel --plus echo '{,,A}' ::: "$myvar"
abcAaAdef
abcaaadef
  cat num30000 | parallel --xargs echo | wc -l
9
  cat num30000 | parallel --xargs -s 10000 echo | wc -l
99
  cat num30000 | parallel --jobs 4 -m echo | wc -l
9
  parallel --jobs 4 -m echo ::: 1 2 3 4 5 6 7 8 9 10
1 2 3
4 5 6
7 8 9
99
  parallel --jobs 4 -X echo pre-{}-post ::: A B C D E F G
pre-A-post pre-B-post
pre-C-post pre-D-post
pre-E-post pre-F-post
pre-G-post
  parallel -N3 echo ::: A B C D E F G H
A B C
D E F
G H
  parallel -N3 echo 1={1} 2={2} 3={3} ::: A B C D E F G H
1=A 2=B 3=C
1=D 2=E 3=F
1=G 2=H 3=
  parallel -N0 echo foo ::: 1 2 3
foo
  perl -e 'print "@ARGV\n"' A
  parallel perl -e 'print "@ARGV\n"' ::: This wont work
  Warning: Input is read from the terminal. You either know what you
  Warning: are doing (in which case: YOU ARE AWESOME!) or you forgot
  Warning: ::: or :::: or to pipe data into parallel. If so
  Warning: Press CTRL-D to exit.
  perl -e 'print "@ARGV\n"'
  [CTRL-D]
/usr/bin/bash: line 2: Warning:: command not found
  parallel --trim r echo pre-{}-post ::: ' A '
pre- A-post
  parallel --trim l echo pre-{}-post ::: ' A '
pre-A -post
  parallel --trim lr echo pre-{}-post ::: ' A '
pre-A-post
  parallel echo \={} ::: zsh bash ls
=zsh
=bash
=ls
  parallel 'set a="{}"; if( { test -d "$a" } ) echo "$a is a dir"' ::: *
  parallel --tag echo foo-{} ::: A B C
A	foo-A
B	foo-B
C	foo-C
  parallel --tagstring {}-bar echo foo-{} ::: A B C
A-bar	foo-A
B-bar	foo-B
C-bar	foo-C
  parallel --dryrun echo {} ::: A B C
echo A
echo B
echo C
  parallel --verbose echo {} ::: A B C
echo A
echo B
echo C
  parallel -j2 'printf "%s-start\n%s" {} {};
    sleep {};printf "%s\n" -middle;echo {}-end' ::: 4 2 1
4-start
2-start
2-middle
2-end
1-start
1-middle
1-end
  parallel -j2 --ungroup 'printf "%s-start\n%s" {} {};
    sleep {};printf "%s\n" -middle;echo {}-end' ::: 4 2 1
4-start
42-start
2-middle
2-end
1-start
1-middle
1-end
-middle
  parallel -j2 --linebuffer 'printf "%s-start\n%s" {} {};
    sleep {};printf "%s\n" -middle;echo {}-end' ::: 4 2 1
4-start
2-start
2-middle
2-end
1-start
1-middle
1-end
  parallel -j2 -k 'printf "%s-start\n%s" {} {};
    sleep {};printf "%s\n" -middle;echo {}-end' ::: 4 2 1
4-start
2-start
2-middle
2-end
1-start
1-middle
1-end
  parallel --files echo ::: A B C
/TMP/tempfile
  parallel --tmpdir /var/tmp --files echo ::: A B C
/var/tmp/tempfile
  parallel --results outdir echo ::: A B C
  outdir/1/A/seq
  outdir/1/A/stderr
  outdir/1/A/stdout
  outdir/1/B/seq
  outdir/1/B/stderr
  outdir/1/B/stdout
  outdir/1/C/seq
  outdir/1/C/stderr
  outdir/1/C/stdout
/usr/bin/bash: line 1: outdir/1/A/seq: No such file or directory
/usr/bin/bash: line 2: outdir/1/A/stderr: No such file or directory
/usr/bin/bash: line 3: outdir/1/A/stdout: No such file or directory
/usr/bin/bash: line 4: outdir/1/B/seq: No such file or directory
/usr/bin/bash: line 5: outdir/1/B/stderr: No such file or directory
/usr/bin/bash: line 6: outdir/1/B/stdout: No such file or directory
/usr/bin/bash: line 7: outdir/1/C/seq: No such file or directory
/usr/bin/bash: line 8: outdir/1/C/stderr: No such file or directory
/usr/bin/bash: line 9: outdir/1/C/stdout: No such file or directory
  parallel --header : --results outdir echo ::: f1 A B ::: f2 C D
  outdir/f1/A/f2/C/seq
  outdir/f1/A/f2/C/stderr
  outdir/f1/A/f2/C/stdout
  outdir/f1/A/f2/D/seq
  outdir/f1/A/f2/D/stderr
  outdir/f1/A/f2/D/stdout
  outdir/f1/B/f2/C/seq
  outdir/f1/B/f2/C/stderr
  outdir/f1/B/f2/C/stdout
  outdir/f1/B/f2/D/seq
  outdir/f1/B/f2/D/stderr
  outdir/f1/B/f2/D/stdout
/usr/bin/bash: line 1: outdir/f1/A/f2/C/seq: No such file or directory
/usr/bin/bash: line 2: outdir/f1/A/f2/C/stderr: No such file or directory
/usr/bin/bash: line 3: outdir/f1/A/f2/C/stdout: No such file or directory
/usr/bin/bash: line 4: outdir/f1/A/f2/D/seq: No such file or directory
/usr/bin/bash: line 5: outdir/f1/A/f2/D/stderr: No such file or directory
/usr/bin/bash: line 6: outdir/f1/A/f2/D/stdout: No such file or directory
/usr/bin/bash: line 7: outdir/f1/B/f2/C/seq: No such file or directory
/usr/bin/bash: line 8: outdir/f1/B/f2/C/stderr: No such file or directory
/usr/bin/bash: line 9: outdir/f1/B/f2/C/stdout: No such file or directory
/usr/bin/bash: line 10: outdir/f1/B/f2/D/seq: No such file or directory
/usr/bin/bash: line 11: outdir/f1/B/f2/D/stderr: No such file or directory
/usr/bin/bash: line 12: outdir/f1/B/f2/D/stdout: No such file or directory
  echo 50% > my_jobs
  sleep 1
  echo 0 > my_jobs
  wait
  parallel --use-cpus-instead-of-cores -N0 sleep 1 :::: num8
  parallel --shuf echo ::: 1 2 3 ::: a b c ::: A B C
123 abc ABC
  tmux -S /tmp/tmsXXXXX attach
no sessions
  parallel --delay 2.5 echo Starting {}\;date ::: 1 2 3
Starting 1
DATE OUTPUT
Starting 2
DATE OUTPUT
Starting 3
DATE OUTPUT
  parallel --timeout 4.1 sleep {}\; echo {} ::: 2 4 6 8
9
parallel: Warning: This job was killed because it timed out:
parallel: Warning: sleep 6; echo 6
parallel: Warning: This job was killed because it timed out:
parallel: Warning: sleep 8; echo 8
  parallel --timeout 200% sleep {}\; echo {} ::: 2.1 2.2 3 7 2.3
9
parallel: Warning: This job was killed because it timed out:
parallel: Warning: sleep 7; echo 7
  parallel --eta sleep ::: 1 3 2 2 1 3 3 2 1
Computers / CPU threads / Max jobs to run
1:local / 9 / 9
Computer:jobs running/jobs completed/%of started jobs/Average seconds to complete
  parallel --progress sleep ::: 1 3 2 2 1 3 3 2 1
Computers / CPU threads / Max jobs to run
1:local / 9 / 9
Computer:jobs running/jobs completed/%of started jobs/Average seconds to complete
  seq 1000 | parallel -j10 --bar '(echo -n {};sleep 0.1)' \
    2> >(perl -pe 'BEGIN{$/="\r";$|=1};s/\r/\n/g' |
         zenity --timeout=15 --progress --auto-kill --auto-close)
  parallel --joblog /tmp/log exit  ::: 1 2 3 0
  cat /tmp/log;
  parallel --joblog /tmp/log exit  ::: 1 2 3 0
  cat /tmp/log;  parallel --resume --joblog /tmp/log exit  ::: 1 2 3 0 0 0
  cat /tmp/log;
  parallel --resume-failed --joblog /tmp/log exit  ::: 1 2 3 0 0 0
  cat /tmp/log;
  parallel --retry-failed --joblog /tmp/log
  cat /tmp/log;
  parallel -j2 --halt soon,fail=1 echo {}\; exit {} ::: 0 0 1 2 3
Seq	Host	Starttime	JobRuntime	Send	Receive	Exitval	Signal	Command
1	:	TIMESTAMP	9.999	0	0	1	0	exit 1
2	:	TIMESTAMP	9.999	0	0	2	0	exit 2
3	:	TIMESTAMP	9.999	0	0	3	0	exit 3
4	:	TIMESTAMP	9.999	0	0	0	0	exit 0
Seq	Host	Starttime	JobRuntime	Send	Receive	Exitval	Signal	Command
1	:	TIMESTAMP	9.999	0	0	1	0	exit 1
2	:	TIMESTAMP	9.999	0	0	2	0	exit 2
3	:	TIMESTAMP	9.999	0	0	3	0	exit 3
4	:	TIMESTAMP	9.999	0	0	0	0	exit 0
Seq	Host	Starttime	JobRuntime	Send	Receive	Exitval	Signal	Command
1	:	TIMESTAMP	9.999	0	0	1	0	exit 1
2	:	TIMESTAMP	9.999	0	0	2	0	exit 2
3	:	TIMESTAMP	9.999	0	0	3	0	exit 3
4	:	TIMESTAMP	9.999	0	0	0	0	exit 0
5	:	TIMESTAMP	9.999	0	0	0	0	exit 0
6	:	TIMESTAMP	9.999	0	0	0	0	exit 0
Seq	Host	Starttime	JobRuntime	Send	Receive	Exitval	Signal	Command
1	:	TIMESTAMP	9.999	0	0	1	0	exit 1
2	:	TIMESTAMP	9.999	0	0	2	0	exit 2
3	:	TIMESTAMP	9.999	0	0	3	0	exit 3
4	:	TIMESTAMP	9.999	0	0	0	0	exit 0
5	:	TIMESTAMP	9.999	0	0	0	0	exit 0
6	:	TIMESTAMP	9.999	0	0	0	0	exit 0
1	:	TIMESTAMP	9.999	0	0	1	0	exit 1
2	:	TIMESTAMP	9.999	0	0	2	0	exit 2
3	:	TIMESTAMP	9.999	0	0	3	0	exit 3
Seq	Host	Starttime	JobRuntime	Send	Receive	Exitval	Signal	Command
1	:	TIMESTAMP	9.999	0	0	1	0	exit 1
2	:	TIMESTAMP	9.999	0	0	2	0	exit 2
3	:	TIMESTAMP	9.999	0	0	3	0	exit 3
4	:	TIMESTAMP	9.999	0	0	0	0	exit 0
5	:	TIMESTAMP	9.999	0	0	0	0	exit 0
6	:	TIMESTAMP	9.999	0	0	0	0	exit 0
1	:	TIMESTAMP	9.999	0	0	1	0	exit 1
2	:	TIMESTAMP	9.999	0	0	2	0	exit 2
3	:	TIMESTAMP	9.999	0	0	3	0	exit 3
1	:	TIMESTAMP	9.999	0	0	1	0	exit 1
2	:	TIMESTAMP	9.999	0	0	2	0	exit 2
3	:	TIMESTAMP	9.999	0	0	3	0	exit 3
9
  parallel -j2 --halt now,fail=1 echo {}\; exit {} ::: 0 0 1 2 3
9
  parallel -j2 --halt soon,fail=20% echo {}\; exit {} \
    ::: 0 1 2 3 4 5 6 7 8 9
9
  parallel -j2 --halt now,success=1 echo {}\; exit {} ::: 1 2 3 0 4 5 6
9
parallel: This job succeeded:
  parallel -k --retries 3 \
    'echo tried {} >>/tmp/runs; echo completed {}; exit {}' ::: 1 2 0
  cat /tmp/runs
completed 1
completed 2
completed 0
tried 0
  show_signals() {
    perl -e 'for(keys %SIG) {
        $SIG{$_} = eval "sub { print \"Got $_\\n\"; }";
      }
      while(1){sleep 1}'
  }
  export -f show_signals
  echo | parallel --termseq TERM,200,TERM,100,TERM,50,KILL,25 \
    -u --timeout 1 show_signals
parallel: Warning: This job was killed because it timed out:
parallel: Warning: show_signals ''
  echo | parallel --termseq INT,200,TERM,100,KILL,25 \
    -u --timeout 1 show_signals
/usr/bin/bash: line 1: show_signals: command not found
  parallel --load 100% echo load is less than {} job per cpu ::: 1
load is less than 1 job per cpu
  parallel --noswap echo the system is not swapping ::: now
the system is not swapping now
  parallel --memfree 1G echo will run if more than 1 GB is ::: free
will run if more than 1 GB is free
  parallel --nice 17 echo this is being run with nice -n ::: 17
this is being run with nice -n 17
  parallel -S $SERVER1 echo running on ::: $SERVER1
running on parallel@lo
  parallel -S $SERVER1 echo running on ::: username@$SERVER1
running on username@parallel@lo
  parallel -S : echo running on ::: the_local_machine
running on the_local_machine
  parallel -S '/usr/bin/ssh '$SERVER1 echo custom ::: ssh
custom ssh
  parallel --ssh /usr/bin/ssh -S $SERVER1 echo custom ::: ssh
custom ssh
  export PARALLEL_SSH=/usr/bin/ssh
  parallel -S $SERVER1 echo custom ::: ssh
custom ssh
  parallel -S $SERVER1 -S $SERVER2 echo ::: running on more hosts
running
on
more
hosts
  echo $SERVER1 > nodefile
  # Force 4 cores, special ssh-command, username
  echo 4//usr/bin/ssh $SERVER2 >> nodefile
  parallel --sshloginfile nodefile echo ::: running on more hosts
running
on
more
hosts
  parallel -S 4/$SERVER1 echo force {} cpus on server ::: 4
force 4 cpus on server
  parallel --hostgroup -S @grp1/$SERVER1 -S @grp2/$SERVER2 echo {} \
    ::: run_on_grp1@grp1 run_on_grp2@grp2
run_on_grp1
run_on_grp2
  echo This is input_file > input_file
  parallel -S $SERVER1 --transferfile {} cat ::: input_file
  echo This is input_file > input_file
  parallel -S $SERVER1 --transferfile {} --return {}.out \
    cat {} ">"{}.out ::: input_file
  cat input_file.out
  echo This is input_file > input_file
  parallel -S $SERVER1 --transferfile {} --return {}.out --cleanup \
    cat {} ">"{}.out ::: input_file
  cat input_file.out
  echo This is input_file > input_file
  parallel -S $SERVER1 --trc {}.out cat {} ">"{}.out ::: input_file
  cat input_file.out
  echo common data > common_file
  parallel --basefile common_file -S $SERVER1 \
    cat common_file\; echo {} ::: foo
common data
foo
  parallel -S $SERVER1 pwd ::: "
  parallel --workdir . -S $SERVER1 pwd ::: "
  parallel --workdir ... -S $SERVER1 pwd ::: "
/home/parallel
/TMP
/home/parallel/.TMPWORKDIR
  parallel -S $SERVER1 --sshdelay 0.2 echo ::: 1 2 3
9
  parallel --controlmaster -S $SERVER1 echo ::: 1 2 3
9
  parallel --onall -S $SERVER1,$SERVER2 echo ::: foo bar
foo
bar
foo
bar
  parallel --nonall --tag -S $SERVER1,$SERVER2 echo foo bar
csh@lo	foo bar
parallel@lo	foo bar
  source `which env_parallel.bash`
  alias myecho=echo
  myvar="Joe's var is"
  env_parallel -S $SERVER1 'myecho $myvar' ::: green
Unknown option: -S
Unknown option: parallel@lo
Unknown option: myecho $myvar
Unknown option: :::
Unknown option: green
You have called the dummy script "env_parallel".
env_parallel only works if it is a function.
You need to do this and restart your shell:
bash:  Put this in $HOME/.bashrc:  . env_parallel.bash
       E.g. by doing:  echo '. env_parallel.bash' >> $HOME/.bashrc
       Supports: variables, aliases, functions, arrays
fish:  Put this in $HOME/.config/fish/config.fish:  . (which env_parallel.fish)
       E.g. by doing:
         echo '. (which env_parallel.fish)' >> $HOME/.config/fish/config.fish
       Supports: variables, aliases, functions, arrays
ksh:   Put this in $HOME/.kshrc:  source env_parallel.ksh
       E.g. by doing:  echo 'source env_parallel.ksh' >> $HOME/.kshrc
       Supports: variables, aliases, functions, arrays
mksh:  Put this in $HOME/.mkshrc:  source env_parallel.mksh
       E.g. by doing:  echo 'source env_parallel.mksh' >> $HOME/.mkshrc
       Supports: variables, aliases, functions, arrays
pdksh: Put this in $HOME/.profile:  source env_parallel.pdksh
       E.g. by doing:  echo '. env_parallel.pdksh' >> $HOME/.profile
       Supports: variables, aliases, functions, arrays
zsh:   Put this in $HOME/.zshrc:  . env_parallel.zsh
       E.g. by doing:  echo '. env_parallel.zsh' >> $HOME/.zshenv
       Supports: variables, functions, arrays
ash:   Put this in $HOME/.profile:  . env_parallel.ash
       E.g. by doing:  echo '. env_parallel.ash' >> $HOME/.profile
       Supports: variables, aliases
dash:  Put this in $HOME/.profile:  . env_parallel.dash
       E.g. by doing:  echo '. env_parallel.dash' >> $HOME/.profile
       Supports: variables, aliases
csh:   Put this in $HOME/.cshrc:  source `which env_parallel.csh`
       E.g. by doing:  echo 'source `which env_parallel.csh`' >> $HOME/.cshrc
       Supports: variables, aliases, arrays with no special chars
tcsh:  Put this in $HOME/.tcshrc:  source `which env_parallel.tcsh`
       E.g. by doing:  echo 'source `which env_parallel.tcsh`' >> $HOME/.tcshrc
       Supports: variables, aliases, arrays with no special chars
To install in all shells run:
  env_parallel --install
In a script you need to run this before using env_parallel:
bash:  . env_parallel.bash
ksh:   source env_parallel.ksh
mksh:  source env_parallel.mksh
pdksh: source env_parallel.pdksh
zsh:   . env_parallel.zsh
ash:   . env_parallel.ash
dash:  . env_parallel.dash
For details: see  man env_parallel
  MYVAR='foo bar'
  export MYVAR
  parallel --env MYVAR -S $SERVER1 echo '$MYVAR' ::: baz
foo bar baz
  my_func() {
    echo in my_func $1
  }
  export -f my_func
  parallel --env my_func -S $SERVER1 my_func ::: baz
in my_func baz
  parallel --record-env
  cat ~/.parallel/ignored_vars|sort
BASH_FUNC_replace_tmpdir%%
BASH_FUNC_run_once%%
BASH_FUNC_run_test%%
_
qTMPDIR
qqTMPDIR
testsuitedir
withpassword
  # The function is only copied if using Bash
  my_func2() {
    echo in my_func2 $VAR $1
  }
  export -f my_func2
  VAR=foo
  export VAR
  parallel --env _ -S $SERVER1 'echo $VAR; my_func2' ::: bar
script line 2: my_func2: command not found
  NOT='not exported var'
  alias myecho=echo
  not_ex() {
    myecho in not_exported_func $NOT $1
  }
  env_parallel --env _ -S $SERVER1 'echo $NOT; not_ex' ::: bar
Unknown option: --env
Unknown option: _
Unknown option: -S
Unknown option: parallel@lo
Unknown option: echo $NOT; not_ex
Unknown option: :::
Unknown option: bar
You have called the dummy script "env_parallel".
env_parallel only works if it is a function.
You need to do this and restart your shell:
bash:  Put this in $HOME/.bashrc:  . env_parallel.bash
       E.g. by doing:  echo '. env_parallel.bash' >> $HOME/.bashrc
       Supports: variables, aliases, functions, arrays
fish:  Put this in $HOME/.config/fish/config.fish:  . (which env_parallel.fish)
       E.g. by doing:
         echo '. (which env_parallel.fish)' >> $HOME/.config/fish/config.fish
       Supports: variables, aliases, functions, arrays
ksh:   Put this in $HOME/.kshrc:  source env_parallel.ksh
       E.g. by doing:  echo 'source env_parallel.ksh' >> $HOME/.kshrc
       Supports: variables, aliases, functions, arrays
mksh:  Put this in $HOME/.mkshrc:  source env_parallel.mksh
       E.g. by doing:  echo 'source env_parallel.mksh' >> $HOME/.mkshrc
       Supports: variables, aliases, functions, arrays
pdksh: Put this in $HOME/.profile:  source env_parallel.pdksh
       E.g. by doing:  echo '. env_parallel.pdksh' >> $HOME/.profile
       Supports: variables, aliases, functions, arrays
zsh:   Put this in $HOME/.zshrc:  . env_parallel.zsh
       E.g. by doing:  echo '. env_parallel.zsh' >> $HOME/.zshenv
       Supports: variables, functions, arrays
ash:   Put this in $HOME/.profile:  . env_parallel.ash
       E.g. by doing:  echo '. env_parallel.ash' >> $HOME/.profile
       Supports: variables, aliases
dash:  Put this in $HOME/.profile:  . env_parallel.dash
       E.g. by doing:  echo '. env_parallel.dash' >> $HOME/.profile
       Supports: variables, aliases
csh:   Put this in $HOME/.cshrc:  source `which env_parallel.csh`
       E.g. by doing:  echo 'source `which env_parallel.csh`' >> $HOME/.cshrc
       Supports: variables, aliases, arrays with no special chars
tcsh:  Put this in $HOME/.tcshrc:  source `which env_parallel.tcsh`
       E.g. by doing:  echo 'source `which env_parallel.tcsh`' >> $HOME/.tcshrc
       Supports: variables, aliases, arrays with no special chars
To install in all shells run:
  env_parallel --install
In a script you need to run this before using env_parallel:
bash:  . env_parallel.bash
ksh:   source env_parallel.ksh
mksh:  source env_parallel.mksh
pdksh: source env_parallel.pdksh
zsh:   . env_parallel.zsh
ash:   . env_parallel.ash
dash:  . env_parallel.dash
For details: see  man env_parallel
  parallel -vv --pipepart --block 1M wc :::: num30000
<num30000 perl -e 'while(@ARGV){sysseek(STDIN,shift,0)||die;$left=shift;while($read=sysread(STDIN,$buf,$left>32767?32767:$left)){$left-=$read;syswrite(STDOUT,$buf);}}' 0 0 0 168894 |(wc)
  30000   30000  168894
  my_func3() {
    echo in my_func $1 > $1.out
  }
  export -f my_func3
  parallel -vv --workdir ... --nice 17 --env _ --trc {}.out \
    -S $SERVER1 my_func3 {} ::: abc-file
ssh -l parallel lo -- exec mkdir -p ./.TMPWORKDIR && rsync --protocol 30 --old-args -rlDzR -e'ssh -l parallel' ./abc-file lo:./.TMPWORKDIR;ssh -l parallel lo -- exec perl -X -e GNU_Parallel_worker,eval+pack+q/H10000000/,join+q//,@ARGV BASE64;_EXIT_status=$?; mkdir -p ./. && rsync --protocol 30 --old-args -rlDzR -e'ssh -l parallel' --rsync-path='cd ./.TMPWORKDIR/./.; rsync' -- lo:./abc-file.out ./.;ssh -l parallel lo -- exec 'sh -c '"'"'rm -f ./.TMPWORKDIR/abc-file 2>/dev/null;rmdir ./.TMPWORKDIR/ ./.parallel/tmp/ ./.parallel/ 2>/dev/null;rm -rf ./.TMPWORKDIR;'"'";ssh -l parallel lo -- exec 'sh -c '"'"'rm -f ./.TMPWORKDIR/abc-file.out 2>/dev/null;rmdir ./.TMPWORKDIR/ ./.parallel/tmp/ ./.parallel/ 2>/dev/null;rm -rf ./.TMPWORKDIR;'"'";ssh -l parallel lo -- exec rm -rf .TMPWORKDIR;exit $_EXIT_status;
  parset myvar1,myvar2 echo ::: a b
  echo $myvar1
  echo $myvar2
Unknown option: myvar1,myvar2
Unknown option: echo
Unknown option: :::
Unknown option: a
Unknown option: b
parset only works if it is a function. The function is defined as part
of env_parallel.
Do the below and restart your shell.
bash:  Put this in $HOME/.bashrc:  . `which env_parallel.bash`
       E.g. by doing:  echo '. `which env_parallel.bash`' >> $HOME/.bashrc
       Supports: variables, aliases, functions, arrays
ksh:   Put this in $HOME/.kshrc:  source `which env_parallel.ksh`
       E.g. by doing:  echo 'source `which env_parallel.ksh`' >> $HOME/.kshrc
       Supports: variables, aliases, functions, arrays
mksh:  Put this in $HOME/.mkshrc:  source `which env_parallel.mksh`
       E.g. by doing:  echo 'source `which env_parallel.mksh`' >> $HOME/.mkshrc
       Supports: variables, aliases, functions, arrays
pdksh: Put this in $HOME/.profile:  source `which env_parallel.pdksh`
       E.g. by doing:  echo '. `which env_parallel.pdksh`' >> $HOME/.profile
       Supports: variables, aliases, functions, arrays
zsh:   Put this in $HOME/.zshrc:  . `which env_parallel.zsh`
       E.g. by doing:  echo '. `which env_parallel.zsh`' >> $HOME/.zshenv
       Supports: variables, functions, arrays
ash:   Put this in $HOME/.profile:  . `which env_parallel.ash`
       E.g. by doing:  echo '. `which env_parallel.ash`' >> $HOME/.profile
       Supports: variables, aliases
dash:  Put this in $HOME/.profile:  . `which env_parallel.dash`
       E.g. by doing:  echo '. `which env_parallel.dash`' >> $HOME/.profile
       Supports: variables, aliases
fish:  Unsupported
csh:   Unsupported
tcsh:  Unsupported
To install in all shells run:
  parset --install
In a script you need to run this before using parset:
bash:  . `which env_parallel.bash`
ksh:   source `which env_parallel.ksh`
mksh:  source `which env_parallel.mksh`
pdksh: source `which env_parallel.pdksh`
zsh:   . `which env_parallel.zsh`
ash:   . `which env_parallel.ash`
dash:  . `which env_parallel.dash`
For details: see  man parset
  parset myarray seq {} 5 ::: 1 2 3
  echo "${myarray[1]}"
Unknown option: myarray
Unknown option: seq
Unknown option: {}
Unknown option: 5
Unknown option: :::
Unknown option: 1
Unknown option: 2
Unknown option: 3
parset only works if it is a function. The function is defined as part
of env_parallel.
Do the below and restart your shell.
bash:  Put this in $HOME/.bashrc:  . `which env_parallel.bash`
       E.g. by doing:  echo '. `which env_parallel.bash`' >> $HOME/.bashrc
       Supports: variables, aliases, functions, arrays
ksh:   Put this in $HOME/.kshrc:  source `which env_parallel.ksh`
       E.g. by doing:  echo 'source `which env_parallel.ksh`' >> $HOME/.kshrc
       Supports: variables, aliases, functions, arrays
mksh:  Put this in $HOME/.mkshrc:  source `which env_parallel.mksh`
       E.g. by doing:  echo 'source `which env_parallel.mksh`' >> $HOME/.mkshrc
       Supports: variables, aliases, functions, arrays
pdksh: Put this in $HOME/.profile:  source `which env_parallel.pdksh`
       E.g. by doing:  echo '. `which env_parallel.pdksh`' >> $HOME/.profile
       Supports: variables, aliases, functions, arrays
zsh:   Put this in $HOME/.zshrc:  . `which env_parallel.zsh`
       E.g. by doing:  echo '. `which env_parallel.zsh`' >> $HOME/.zshenv
       Supports: variables, functions, arrays
ash:   Put this in $HOME/.profile:  . `which env_parallel.ash`
       E.g. by doing:  echo '. `which env_parallel.ash`' >> $HOME/.profile
       Supports: variables, aliases
dash:  Put this in $HOME/.profile:  . `which env_parallel.dash`
       E.g. by doing:  echo '. `which env_parallel.dash`' >> $HOME/.profile
       Supports: variables, aliases
fish:  Unsupported
csh:   Unsupported
tcsh:  Unsupported
To install in all shells run:
  parset --install
In a script you need to run this before using parset:
bash:  . `which env_parallel.bash`
ksh:   source `which env_parallel.ksh`
mksh:  source `which env_parallel.mksh`
pdksh: source `which env_parallel.pdksh`
zsh:   . `which env_parallel.zsh`
ash:   . `which env_parallel.ash`
dash:  . `which env_parallel.dash`
For details: see  man parset
  cmd=("echo '<<joe  \"double  space\"  cartoon>>'" "pwd")
  parset data ::: "${cmd[@]}"
  echo "${data[0]}"
  echo "${data[1]}"
Unknown option: data
Unknown option: :::
Unknown option: echo '<<joe  "double  space"  cartoon>>'
Unknown option: pwd
parset only works if it is a function. The function is defined as part
of env_parallel.
Do the below and restart your shell.
bash:  Put this in $HOME/.bashrc:  . `which env_parallel.bash`
       E.g. by doing:  echo '. `which env_parallel.bash`' >> $HOME/.bashrc
       Supports: variables, aliases, functions, arrays
ksh:   Put this in $HOME/.kshrc:  source `which env_parallel.ksh`
       E.g. by doing:  echo 'source `which env_parallel.ksh`' >> $HOME/.kshrc
       Supports: variables, aliases, functions, arrays
mksh:  Put this in $HOME/.mkshrc:  source `which env_parallel.mksh`
       E.g. by doing:  echo 'source `which env_parallel.mksh`' >> $HOME/.mkshrc
       Supports: variables, aliases, functions, arrays
pdksh: Put this in $HOME/.profile:  source `which env_parallel.pdksh`
       E.g. by doing:  echo '. `which env_parallel.pdksh`' >> $HOME/.profile
       Supports: variables, aliases, functions, arrays
zsh:   Put this in $HOME/.zshrc:  . `which env_parallel.zsh`
       E.g. by doing:  echo '. `which env_parallel.zsh`' >> $HOME/.zshenv
       Supports: variables, functions, arrays
ash:   Put this in $HOME/.profile:  . `which env_parallel.ash`
       E.g. by doing:  echo '. `which env_parallel.ash`' >> $HOME/.profile
       Supports: variables, aliases
dash:  Put this in $HOME/.profile:  . `which env_parallel.dash`
       E.g. by doing:  echo '. `which env_parallel.dash`' >> $HOME/.profile
       Supports: variables, aliases
fish:  Unsupported
csh:   Unsupported
tcsh:  Unsupported
To install in all shells run:
  parset --install
In a script you need to run this before using parset:
bash:  . `which env_parallel.bash`
ksh:   source `which env_parallel.ksh`
mksh:  source `which env_parallel.mksh`
pdksh: source `which env_parallel.pdksh`
zsh:   . `which env_parallel.zsh`
ash:   . `which env_parallel.ash`
dash:  . `which env_parallel.dash`
For details: see  man parset
  parallel --sqlandworker csv:///%2Ftmp/log.csv \
    seq ::: 10 ::: 12 13 14
  cat /tmp/log.csv
99
Seq,Host,Starttime,JobRuntime,Send,Receive,Exitval,_Signal,Command,V1,V2,Stdout,Stderr
1,:,000000000.000,0.000,0,9,0,0,"seq 10 12",10,12,"10
99
",
2,:,000000000.000,0.000,0,12,0,0,"seq 10 13",10,13,"10
99
",
3,:,000000000.000,0.000,0,15,0,0,"seq 10 14",10,14,"10
99
",
  parallel --results outdir --sqlandworker csv:///%2Ftmp/log2.csv \
    seq ::: 10 ::: 12 13 14
  cat /tmp/log2.csv
Seq,Host,Starttime,JobRuntime,Send,Receive,Exitval,_Signal,Command,V1,V2,Stdout,Stderr
1,:,000000000.000,0.000,0,9,0,0,"seq 10 12",10,12,outdir/1/10/2/12/stdout,outdir/1/10/2/12/stderr
2,:,000000000.000,0.000,0,12,0,0,"seq 10 13",10,13,outdir/1/10/2/13/stdout,outdir/1/10/2/13/stderr
3,:,000000000.000,0.000,0,15,0,0,"seq 10 14",10,14,outdir/1/10/2/14/stdout,outdir/1/10/2/14/stderr
  vendor://[[user][:password]@][host][:port]/[database[/table]
/usr/bin/bash: line 1: vendor://[[user][:password]@][host][:port]/[database[/table]: No such file or directory
  sqlite3:///%2Ftmp%2Fmydatabase/mytable
  csv:///%2Ftmp/log.csv
/usr/bin/bash: line 1: sqlite3:///%2Ftmp%2Fmydatabase/mytable: No such file or directory
/usr/bin/bash: line 2: csv:///%2Ftmp/log.csv: No such file or directory
  DBURL=sqlite3:///%2Ftmp%2Fmydatabase
  DBURLTABLE=$DBURL/mytable
  parallel --sqlandworker $DBURLTABLE echo ::: foo bar ::: baz quuz
foo baz
foo quuz
bar baz
bar quuz
  sql $DBURL 'SELECT * FROM mytable ORDER BY Seq;'
Error:
SELECT * FROM mytable ORDER BY Seq; is not a valid DBURL
sql [-hnr] [--table-size] [--db-size] [-p pass-through] [-s string] dburl [command]
  parallel --sqlmaster $DBURLTABLE echo ::: foo bar ::: baz quuz
parallel: Error: echo is not a valid DBURL
  parallel --sqlworker $DBURLTABLE echo ::: foo bar ::: baz quuz
parallel: Error: echo is not a valid DBURL
  cat num1000000 | parallel --pipe wc
 999999  999999 9999999
  85352   85352  597465
  cat num1000000 | parallel --pipe --block 2M wc
 999999  999999 9999999
  85349   85349  597444
  cat num1000000 | parallel --pipe -j4 --roundrobin wc
 999999  999999 9999999
  cat num1000000 | parallel --pipe -N140000 wc
 140000  140000  868895
 140000  140000  980000
  20000   20000  140001
  cat num1000000 | parallel --pipe -L75 wc
 999999  999999 9999999
  85500   85500  598500
     25      25     176
  cat fixedlen | parallel --pipe --header .{4} --block 3 --recend '' \
    'echo start; cat; echo'
start
  echo /foo, bar/, /baz, qux/, | \
    parallel -kN1 --recend ', ' --pipe echo JOB{#}\;cat\;echo END
/foo, END
bar/, END
/baz, END
qux/,
  echo /foo, bar/, /baz, qux/, | \
    parallel -kN1 --recstart / --pipe echo JOB{#}\;cat\;echo END
/foo, barEND
/, END
/baz, quxEND
/,
  echo /foo, bar/, /baz, qux/, | \
    parallel -kN1 --recend ', ' --recstart / --pipe \
    echo JOB{#}\;cat\;echo END
/foo, bar/, END
/baz, qux/,
  echo foo,bar,_baz,__qux, | \
    parallel -kN1 --regexp --recend ,_+ --pipe \
    echo JOB{#}\;cat\;echo END
foo,bar,_END
baz,__END
qux,
  echo foo,bar,_baz,__qux, | \
    parallel -kN1 --rrs --regexp --recend ,_+ --pipe \
    echo JOB{#}\;cat\;echo END
foo,barEND
bazEND
qux,
  cat num_%header | \
    parallel --header '(%.*\n)*' --pipe -N3 echo JOB{#}\;cat
cat: num_%header: No such file or directory
  cat num_%header | parallel --header 2 --pipe -N3 echo JOB{#}\;cat
cat: num_%header: No such file or directory
  parallel --pipepart -a num1000000 --block 3m wc
 999999  999999 9999999
 126984  126984  888889
  cat input_file | parallel command
/usr/bin/bash: line 1: This is input_file: command not found
  #!/bin/bash
  #!/usr/bin/parallel --shebang -r echo
  foo
  bar
  baz
/usr/bin/bash: line 1: foo: command not found
/usr/bin/bash: line 2: bar: command not found
/usr/bin/bash: line 3: baz: command not found
  cat input_file | parallel command
  parallel command ::: foo bar
/usr/bin/bash: line 1: This is input_file: command not found
/usr/bin/bash: line 1: foo: command not found
/usr/bin/bash: line 1: bar: command not found
  cat input_file | command
  command foo bar
/usr/bin/bash: line 2: foo: command not found
  #!/usr/bin/perl
  print "@ARGV\n"
Warning: unknown mime-type for "@ARGV\n" -- using "application/octet-stream"
Error: no such file "@ARGV\n"
  parallel perl_echo ::: foo bar
/usr/bin/bash: line 1: perl_echo: command not found
  #!/usr/bin/parallel --shebang-wrap /usr/bin/perl
  print "@ARGV\n"
Warning: unknown mime-type for "@ARGV\n" -- using "application/octet-stream"
Error: no such file "@ARGV\n"
  perl_echo foo bar
/usr/bin/bash: line 1: perl_echo: command not found
  #!/usr/bin/parallel --shebang-wrap /usr/bin/perl
  print "Arguments @ARGV\n";
Warning: unknown mime-type for "Arguments @ARGV\n" -- using "application/octet-stream"
Error: no such file "Arguments @ARGV\n"
  #!/usr/bin/parallel --shebang-wrap /usr/bin/python
  print 'Arguments', str(sys.argv)
  #!/usr/bin/parallel --shebang-wrap /bin/bash
  echo Arguments "$@"
Arguments
  #!/usr/bin/parallel --shebang-wrap /bin/csh
  echo Arguments "$argv"
Arguments 
  #!/usr/bin/parallel --shebang-wrap /usr/bin/tclsh
  puts "Arguments $argv"
/usr/bin/bash: line 3: puts: command not found
  #!/usr/bin/parallel --shebang-wrap /usr/bin/Rscript --vanilla --slave
  args <- commandArgs(trailingOnly = TRUE)
  print(paste("Arguments ",args))
  #!/usr/bin/parallel --shebang-wrap ARG={} /usr/bin/gnuplot
  print "Arguments ", system('echo $ARG')
  #!/usr/bin/parallel --shebang-wrap /usr/bin/ruby
  print "Arguments "
  puts ARGV
Warning: unknown mime-type for "Arguments " -- using "application/octet-stream"
Error: no such file "Arguments "
/usr/bin/bash: line 4: puts: command not found
  #!/usr/bin/parallel --shebang-wrap /usr/bin/octave
  printf ("Arguments");
  arg_list = argv ();
  for i = 1:nargin
    printf (" %s", arg_list{i});
  endfor
  printf ("\n");
  #!/usr/bin/parallel --shebang-wrap /usr/bin/clisp
  (format t "~&~S~&" 'Arguments)
  (format t "~&~S~&" *args*)
  #!/usr/bin/parallel --shebang-wrap /usr/bin/php
  <?php
  echo "Arguments";
  foreach(array_slice($argv,1) as $v)
  {
    echo " $v";
  }
  echo "\n";
  ?>
Arguments
/usr/bin/bash: line 2: ?php: No such file or directory
  #!/usr/bin/parallel --shebang-wrap /usr/bin/node
  var myArgs = process.argv.slice(2);
  console.log('Arguments ', myArgs);
  #!/usr/bin/parallel --shebang-wrap /usr/bin/lua
  io.write "Arguments"
  for a = 1, #arg do
    io.write(" ")
    io.write(arg[a])
  end
  print(")
/usr/bin/bash: line 3: io.write: command not found
  #!/usr/bin/parallel --shebang-wrap ARGV={} /usr/bin/csharp
  var argv = Environment.GetEnvironmentVariable("ARGV");
  print("Arguments "+argv);
  sem 'sleep 1; echo The first finished' &&
    echo The first is now running in the background &&
    sem 'sleep 1; echo The second finished' &&
    echo The second is now running in the background
  sem --wait
The first is now running in the background
The first finished
The second is now running in the background
  sem --fg 'sleep 1; echo The first finished' &&
    echo The first finished running in the foreground &&
    sem --fg 'sleep 1; echo The second finished' &&
    echo The second finished running in the foreground
  sem --wait
The first finished
The first finished running in the foreground
The second finished running in the foreground
  sem --id foo -u 'echo Slow started; sleep 5; echo Slow ended' &&
  sem --id foo --semaphoretimeout 1 'echo Forced running after 1 sec' &&
  sem --id foo --semaphoretimeout -2 'echo Give up after 2 secs'
  sem --id foo --wait
Slow started
Forced running after 1 sec
Slow ended
parallel: Warning: Semaphore timed out. Stealing the semaphore.
  parallel --help
Usage:
parallel [options] [command [arguments]] < list_of_arguments
parallel [options] [command [arguments]] (::: arguments|:::: argfile(s))...
cat ... | parallel --pipe [options] [command [arguments]]
-j n            Run n jobs in parallel
-k              Keep same order
-X              Multiple arguments with context replace
--colsep regexp Split input on regexp for positional replacements
{} {.} {/} {/.} {#} {%} {= perl code =} Replacement strings
{3} {3.} {3/} {3/.} {=3 perl code =}    Positional replacement strings
With --plus:    {} = {+/}/{/} = {.}.{+.} = {+/}/{/.}.{+.} = {..}.{+..} =
                {+/}/{/..}.{+..} = {...}.{+...} = {+/}/{/...}.{+...}
-S sshlogin     Example: foo@server.example.com
--slf ..        Use ~/.parallel/sshloginfile as the list of sshlogins
--trc {}.bar    Shorthand for --transfer --return {}.bar --cleanup
--onall         Run the given command with argument on all sshlogins
--nonall        Run the given command with no arguments on all sshlogins
--pipe          Split stdin (standard input) to multiple jobs.
--recend str    Record end separator for --pipe.
--recstart str  Record start separator for --pipe.
GNU Parallel can do much more. See 'man parallel' for details
Academic tradition requires you to cite works you base your article on.
If you use programs that use GNU Parallel to process data for an article in a
scientific publication, please cite:
  
  Zenodo. 
This helps funding further development; AND IT WON'T COST YOU A CENT.
If you pay 10000 EUR you should feel free to use GNU Parallel without citing.
  parallel --version
GNU parallel VERSION
Copyright (C) 2007-2024 Ole Tange, http://ole.tange.dk and Free Software
Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
GNU parallel comes with no warranty.
Web site: https://www.gnu.org/software/parallel
When using programs that use GNU Parallel to process data for publication
please cite as described in 'parallel --citation'.
  parallel --minversion VERSION && \
    echo Your version is at least VERSION.
Your version is at least VERSION.
  parallel --citation
Academic tradition requires you to cite works you base your article on.
If you use programs that use GNU Parallel to process data for an article in a
scientific publication, please cite:

      author       = {Tange, Ole},
      
      year         = 2023,
      note         = {{GNU Parallel is a general parallelizer to run
                       multiple serial command line programs in parallel
                       without changing them.}},
      publisher    = {Zenodo},
      
      url          = {
}

This helps funding further development; AND IT WON'T COST YOU A CENT.
If you pay 10000 EUR you should feel free to use GNU Parallel without citing.
More about funding GNU Parallel and the citation notice:
https://lists.gnu.org/archive/html/parallel/2013-11/msg00006.html
https://www.gnu.org/software/tempfileallel_design.html#citation-notice
https:BASE64-notice-faq.txt
  parallel --number-of-cpus
  parallel --number-of-cores
9
  echo '--nice 17' > ~/.parallel/nicetimeout
  echo '--timeout 300%' >> ~/.parallel/nicetimeout
  parallel --profile nicetimeout echo ::: A B C
  echo '-vv --dry-run' > ~/.parallel/dryverbose
  parallel --profile dryverbose --profile nicetimeout echo ::: A B C
echo A
echo B
echo C
### 3+3 .par files (from --files), 1 .tms-file from tmux attach
A
A
B
B
C
C