Merge branch '13-document-upgrading-linux-kernel' into 'master'

Resolve "Document Upgrading Linux Kernel"

Closes #13

See merge request !8

chapter/linux.tex

@@ -0,0 +1,34 @@
+\chapter{Linux}
+
+\section{Kernel Upgrades}
+
+\begin{txt}
+    # LIST KERNELS ON /boot PARTITION
+    
+    dpkg --list | grep linux-image
+    dpkg --list | grep linux-headers
+\end{txt}
+
+\begin{txt}    
+    # REMOVE SELECTED KERNEL VERSIONS FROM BOOT PARTITION
+    
+    sudo apt-get purge linux-image-4.4.0-{75,78,79}
+    sudo apt-get purge linux-image-extra-4.4.0-{75,78,79}
+    sudo apt-get purge linux-headers-4.4.0-{75,78,79}
+    
+    or
+    
+    sudo apt autoremove [-f]
+\end{txt}
+    
+\begin{txt}
+    # My one-liner to remove old kernels (this also frees up disk space)
+    # https://askubuntu.com/a/254585
+    
+    dpkg --list | grep linux-image | awk '{ print \$2 }' | sort -V | sed -n '/'`uname -r`'/q;p' | xargs sudo apt-get -y purge
+\end{txt}
+    
+\begin{txt}    
+    # Remember to update grub2 configuration
+    sudo update-grub2
+\end{txt}

main.tex

@@ -33,6 +33,7 @@
 \include{chapter/wireless}
 \include{chapter/voip}
 \include{chapter/baseconf}
+\include{chapter/linux}
 
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