I've read some questions on here about purging old kernels to make room in /boot. The recommendation is to run something like this: sudo apt-get purge linux-image-x.x.x-{xx,xx,xx}-generic but there is no mention of linux-image-extra-x.x.x-xx-generic.
Should I be purging these as well?
For example here is my current output of dpkg -l | grep linux-image:
ii linux-image-3.13.0-55-generic 3.13.0-55.94 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii linux-image-3.13.0-57-generic 3.13.0-57.95 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-44-generic 3.13.0-44.73 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-45-generic 3.13.0-45.74 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii linux-image-extra-3.13.0-55-generic 3.13.0-55.94 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii linux-image-extra-3.13.0-57-generic 3.13.0-57.95 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii linux-image-generic 3.13.0.57.64 amd64 Generic Linux kernel image