Added w4it-for-port-open + zram init.

This commit is contained in:
Ole Tange 2012-04-13 00:23:41 +02:00
parent 75bfdd18ba
commit d99234ae95
2 changed files with 139 additions and 0 deletions

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#!/bin/bash
HOST=$1
PORT=$2
usage () {
echo "Usage:"
echo " $0 host [port]"
echo " port defaults to 22 (ssh)"
exit 1
}
print_not_reachable () {
if [ "$NOT_REACHABLE" = "1" ] ; then
echo -n .
else
echo -n $HOST:$PORT is not reachable
NOT_REACHABLE=1
fi
}
print_up_but_port_closed () {
if [ "$PORT_CLOSED" = "1" ] ; then
echo -n .
else
echo -n $HOST is up but port $PORT is closed
PORT_CLOSED=1
fi
}
port_is_open () {
# If tcptraceroute stops working use:
# echo | nc -w 2 $HOST $PORT || failed
OUT=$(tcptraceroute -f 255 -m 255 -q 1 -w 1 $HOST $PORT 2>&1)
if echo "$OUT" | grep 'Destination not reached' >/dev/null ; then
print_not_reachable
OPEN=no
elif echo "$OUT" | grep '\[closed\]' >/dev/null ; then
print_up_but_port_closed
sleep 1
OPEN=no
else
OPEN=yes
fi
}
if [ -z "$HOST" ] ; then
usage
fi
if [ -z "$PORT" ] ; then
PORT=22
fi
port_is_open
while [ "$OPEN" = "no" ] ; do
port_is_open
done
echo

80
zram-init/zram Executable file
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#!/bin/bash
### BEGIN INIT INFO
# Provides: zram
# Required-Start:
# Required-Stop:
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Increased Performance In Linux With zRam (Virtual Swap Compressed in RAM)
# Description: Adapted from systemd scripts at https://github.com/mystilleef/FedoraZram
### END INIT INFO
# Author: tradetaxfree http://crunchbanglinux.org/forums/topic/15344/zram-a-good-idea/
start() {
# get the number of CPUs
num_cpus=$(grep -c processor /proc/cpuinfo)
# if something goes wrong, assume we have 1
[ "$num_cpus" != 0 ] || num_cpus=1
# set decremented number of CPUs
decr_num_cpus=$((num_cpus - 1))
# get the amount of memory in the machine
mem_total_kb=$(grep MemTotal /proc/meminfo | grep -E --only-matching '[[:digit:]]+')
mem_total=$((mem_total_kb * 1024))
# load dependency modules
modprobe zram zram_num_devices=$num_cpus
# initialize the devices
for i in $(seq 0 $decr_num_cpus); do
echo $((mem_total / num_cpus)) > /sys/block/zram$i/disksize
done
# Creating swap filesystems
for i in $(seq 0 $decr_num_cpus); do
mkswap /dev/zram$i
done
# Switch the swaps on
for i in $(seq 0 $decr_num_cpus); do
swapon -p 100 /dev/zram$i
done
}
stop() {
# get the number of CPUs
num_cpus=$(grep -c processor /proc/cpuinfo)
# set decremented number of CPUs
decr_num_cpus=$((num_cpus - 1))
# Switching off swap
for i in $(seq 0 $decr_num_cpus); do
if [ "$(grep /dev/zram$i /proc/swaps)" != "" ]; then
swapoff /dev/zram$i
sleep 0.1
fi
done
sleep 0.1
modprobe -r zram
}
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
stop
sleep 3
start
;;
*)
echo "Usage: $0 {start|stop|restart}"
RETVAL=1
esac
exit $RETVAL