[CentOS] /dev/md1 => 93% Used. Warning. Disk Filling up. - what would be safe to delete in /boot ?

Wed Feb 7 09:41:44 UTC 2018
Alexander Farber <alexander.farber at gmail.com>

Thank you Pete for the very insightful answer!

This has worked like a charm -

On Wed, Feb 7, 2018 at 10:16 AM, Pete Biggs <pete at biggs.org.uk> wrote:

>
> In fact there are a number of tools to help you.  By default yum keeps
> 5 versions of old kernels (which is usually too many for the default
> /boot size - good joined-up thinking there!), that number is specified
> in /etc/yum.conf as "installonly_limit=5" - change that to a suitable
> number for you, personally I use '3', some people have '2' - don't put
> it at '1' because then you'll not be able to use an old version to boot
> in to in emergency.
>
> The package yum-utils has the package-cleanup command to deal with
> various yum issues, including sorting out old kernels. Do
>
>    package-cleanup --oldkernels --count=3
>
> to clean everything to do with old kernels leaving 3 versions on your
> system.
>


I had:

    /dev/md1                        488M  428M   34M  93% /boot

Then I after running

# package-cleanup --oldkernels --count=3
Loaded plugins: fastestmirror
--> Running transaction check
---> Package kernel.x86_64 0:3.10.0-693.2.2.el7 will be erased
---> Package kernel.x86_64 0:3.10.0-693.5.2.el7 will be erased
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
 Package       Arch          Version                      Repository
Size
================================================================================
Removing:
 kernel        x86_64        3.10.0-693.2.2.el7           @updates
59 M
 kernel        x86_64        3.10.0-693.5.2.el7           @updates
59 M

Transaction Summary
================================================================================
Remove  2 Packages

Installed size: 119 M
Is this ok [y/N]: y
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Erasing    : kernel.x86_64
1/2
  Erasing    : kernel.x86_64
2/2
  Verifying  : kernel-3.10.0-693.5.2.el7.x86_64
1/2
  Verifying  : kernel-3.10.0-693.2.2.el7.x86_64
2/2

Removed:
  kernel.x86_64 0:3.10.0-693.2.2.el7     kernel.x86_64 0:3.10.0-693.5.2.el7

Complete!

I've ended up with comforting

    /dev/md1                        488M  279M  184M  61% /boot

Have a nice day!
Alex