Ubuntu Trusty Partial Updates on New Install?

[Cavsfan]

I use a script on my headless server to remove old kernels, that works well for me:

dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed "s/\(.*\)-\([^0-9]\+\)/\1/")"'/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d' | xargs sudo apt-get purge

Does a dry run, without removing anything, if everything looks good, then run:

dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed "s/\(.*\)-\([^0-9]\+\)/\1/")"'/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d' | xargs sudo apt-get -y purge

Note: the only difference between the two commands is that the -y option is added before the purge option in the second command.

Interesting.... Is that supposed to remove the previous kernel as I have 2 kernels installed at present - 3.13.0-8-generic and 3.13.0-7-generic.
When I ran the first part it said it was going to remove the 3.13.0-7-generic which would leave me with only one.

You would probably only use this if you knew a new kernel was just installed and you had 3 at the time you ran the script. Is that accurate?
That is pretty nice.

[cariboo]

I usually ignore my server, and just use it, it's only when I log into via ssh that I see a new kernel has been installed. I also only reboot, when I think about it. There is no access to this server from the outside world, so there's no problem with only rebooting occasionally. As you can see from the uprecords output, I've had several kernals installed:

uprecords
     #               Uptime | System                                     Boot up
----------------------------+---------------------------------------------------
     1    98 days, 19:58:28 | Linux 3.2.0-53-generic    Wed Sep 11 20:20:19 2013
     2    54 days, 07:33:04 | Linux 3.2.0-39-generic    Thu Mar 28 14:00:52 2013
     3    48 days, 00:51:53 | Linux 3.2.0-57-generic    Thu Dec 19 15:19:27 2013
     4    43 days, 11:40:26 | Linux 3.2.0-34-generic    Fri Dec  7 11:24:15 2012
     5    32 days, 01:57:36 | Linux 3.2.0-39-generic    Sat Aug 10 18:22:56 2013
     6    25 days, 21:37:33 | Linux 3.2.0-36-generic    Sun Jan 20 15:05:28 2013
     7    21 days, 03:24:31 | Linux 3.2.0-39-generic    Thu Jul 11 17:41:29 2013
     8    12 days, 22:32:40 | Linux 3.2.0-37-generic    Fri Feb 15 12:42:21 2013
     9    12 days, 17:49:17 | Linux 3.2.0-38-generic    Sat Mar  2 16:05:51 2013
    10    11 days, 19:51:40 | Linux 3.2.0-39-generic    Sun Jun  2 19:38:53 2013
----------------------------+---------------------------------------------------
->  16     4 days, 02:47:31 | Linux 3.2.0-58-generic    Wed Feb  5 16:09:46 2014
----------------------------+---------------------------------------------------
1up in     0 days, 16:34:33 | at                        Mon Feb 10 11:31:49 2014
t10 in     7 days, 17:04:10 | at                        Mon Feb 17 12:01:26 2014
no1 in    94 days, 17:10:58 | at                        Thu May 15 13:08:14 2014
    up   424 days, 12:05:30 | since                     Fri Dec  7 11:24:15 2012
  down     4 days, 19:27:32 | since                     Fri Dec  7 11:24:15 2012
   %up               98.879 | since                     Fri Dec  7 11:24:15 2012

The last time I cleaned out old kernels, there were three to be removed after I determined that it booted into the latest one successfully.

[Cavsfan]

I usually ignore my server, and just use it, it's only when I log into via ssh that I see a new kernel has been installed. I also only reboot, when I think about it. There is no access to this server from the outside world, so there's no problem with only rebooting occasionally. As you can see from the uprecords output, I've had several kernals installed:

uprecords
     #               Uptime | System                                     Boot up
----------------------------+---------------------------------------------------
     1    98 days, 19:58:28 | Linux 3.2.0-53-generic    Wed Sep 11 20:20:19 2013
     2    54 days, 07:33:04 | Linux 3.2.0-39-generic    Thu Mar 28 14:00:52 2013
     3    48 days, 00:51:53 | Linux 3.2.0-57-generic    Thu Dec 19 15:19:27 2013
     4    43 days, 11:40:26 | Linux 3.2.0-34-generic    Fri Dec  7 11:24:15 2012
     5    32 days, 01:57:36 | Linux 3.2.0-39-generic    Sat Aug 10 18:22:56 2013
     6    25 days, 21:37:33 | Linux 3.2.0-36-generic    Sun Jan 20 15:05:28 2013
     7    21 days, 03:24:31 | Linux 3.2.0-39-generic    Thu Jul 11 17:41:29 2013
     8    12 days, 22:32:40 | Linux 3.2.0-37-generic    Fri Feb 15 12:42:21 2013
     9    12 days, 17:49:17 | Linux 3.2.0-38-generic    Sat Mar  2 16:05:51 2013
    10    11 days, 19:51:40 | Linux 3.2.0-39-generic    Sun Jun  2 19:38:53 2013
----------------------------+---------------------------------------------------
->  16     4 days, 02:47:31 | Linux 3.2.0-58-generic    Wed Feb  5 16:09:46 2014
----------------------------+---------------------------------------------------
1up in     0 days, 16:34:33 | at                        Mon Feb 10 11:31:49 2014
t10 in     7 days, 17:04:10 | at                        Mon Feb 17 12:01:26 2014
no1 in    94 days, 17:10:58 | at                        Thu May 15 13:08:14 2014
    up   424 days, 12:05:30 | since                     Fri Dec  7 11:24:15 2012
  down     4 days, 19:27:32 | since                     Fri Dec  7 11:24:15 2012
   %up               98.879 | since                     Fri Dec  7 11:24:15 2012

The last time I cleaned out old kernels, there were three to be removed after I determined that it booted into the latest one successfully.

Pretty sweet! I'll keep this in mind.