Added tool to clean up old kernel images in /boot on ubuntu

Author: Mike Seidle

.gitignore

@@ -15,3 +15,7 @@
 *.exe
 *.out
 *.app
+
+# editor artifacts
+\#*\#
+*~

README.md

@@ -1,4 +1,13 @@
 bash
 ====
+Misc. useful bash scripts that are useful to me, and maybe someone else.
+
+License
+-------
+GNU GPL V2 - http://www.gnu.org/licenses/gpl-2.0.html
+
+What's In This Repo?
+--------------------
+* /ubuntu - Ubuntu specific scripts
+  * clean-kernel-images.sh - Script for removing old kernels from /boot. In other news, Ubuntu server defaults to a tiny /boot partition and aftere 5-10 upgrades it runs out of space. 
 
-Misc. useful bash scripts

ubuntu/clean-kernel-images.sh

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+#!/bin/bash
+
+# clean-kernel-images.sh
+# ----------------------
+# removes old kernel images from /boot 
+# 
+# does so by creating a list of kernel images in /tmp/oldimages and 
+# then calling apt-get purge for each. Use this two ways:
+#
+# Get rid of all but the current Kernel:
+# 
+# $ sudo cleankernelimages
+#
+# Create a list of kernels, review and then remove.
+#
+# $ sudo createkernellist
+#
+# edit /tmp/oldimages with your favorite text editor
+#
+# sudo removeoldkernels
+#
+
+function createkernellist()
+{
+    dpkg -l ‘linux-*’ | sed ‘/^ii/!d;/’”$(uname -r | sed “s/\(.*\)-\([^0-9]\+\)/\1/”)”‘/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d’ >/tmp/oldimages
+}
+
+function removeoldkernels()
+{
+    cat /tmp/file | xargs sudo apt-get -y purge
+}
+
+function cleankernelimages()
+{
+    cleankernelimages
+    removeoldkernels
+}