From 142e46b51d99ffb184ab4debd51649d1c04a12fc Mon Sep 17 00:00:00 2001
From: Christoffer <netravnen@gmail.com>
Date: Tue, 8 Aug 2017 13:03:43 +0200
Subject: [PATCH 1/2] New chapter Linux

---
 main.tex | 1 +
 1 file changed, 1 insertion(+)

diff --git a/main.tex b/main.tex
index 66d2d61..06521e4 100644
--- a/main.tex
+++ b/main.tex
@@ -33,6 +33,7 @@
 \include{chapter/wireless}
 \include{chapter/voip}
 \include{chapter/baseconf}
+\include{chapter/linux}
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %                                                    %

From 292cc891a27bdf2efff5a7eba6c59d7c2b53f948 Mon Sep 17 00:00:00 2001
From: Christoffer <netravnen@gmail.com>
Date: Tue, 8 Aug 2017 13:03:59 +0200
Subject: [PATCH 2/2] Linux chapter: 1st section: upgrading the kernel

---
 chapter/linux.tex | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 chapter/linux.tex

diff --git a/chapter/linux.tex b/chapter/linux.tex
new file mode 100644
index 0000000..9733274
--- /dev/null
+++ b/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}
\ No newline at end of file