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--- ubuntu:kernel:delete_old_kernel_images [2019/12/15 22:27] – peter
+++ ubuntu:kernel:delete_old_kernel_images [2020/07/15 09:30] (current) – external edit 127.0.0.1
@@ Line 87: / Line 87: @@
 </code>
- * **rc**: means package is in remove/deinstall state and only config file exists.
+  * **rc**: means package is in remove/deinstall state and only config file exists.
- * **ii**: means package is in install state and it is 100% installed on the system.
+  * **ii**: means package is in install state and it is 100% installed on the system.
 ----
@@ Line 117: / Line 117: @@
 Note that all **rc** states have gone.
+----
+===== Deleting all old kernels easily =====
+Get a list of kernels.
+<code bash>
+# Get kernel version.
+v="$(uname -r | awk -F '-virtual' '{ print $1}')"
+# Create ignore list to avoid deleting the running kernel.
+i="linux-headers-virtual|linux-image-virtual|linux-headers-${v}|linux-image-$(uname -r)"
+# Display the list.
+echo dpkg --list | egrep -i  'linux-image|linux-headers' | awk '/ii/{ print $2}' | egrep -v "$i"
+</code>
+To delete it simply run it as follows:
+<code bash>
+v="$(uname -r | awk -F '-virtual' '{ print $1}')"
+i="linux-headers-virtual|linux-image-virtual|linux-headers-${v}|linux-image-$(uname -r)"
+apt --purge remove $(dpkg --list | egrep -i  'linux-image|linux-headers' | awk '/ii/{ print $2}' | egrep -v "$i")
+</code>
+----
+===== Easy way to delete all old kernels =====
+<code bash>
+sudo apt-get purge $(dpkg -l linux-{image,headers}-"[0-9]*" | awk '/ii/{print $2}' | grep -ve "$(uname -r | sed -r 's/-[a-]+//')")
+</code>
+----
+===== Simple way to delete all old kernels =====
+<code bash>
+sudo purge-old-kernels
+</code>