Expanding /boot partition
Recently I tried to update my centos 7 test machine. Unfortunatelly, yum update command returned the following error “At least 54MB more space needed on the /boot filesystem.”.
df -h command showed following:
[root@server ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/cl_centos03-root 32G 13G 19G 41% /
devtmpfs 1.9G 0 1.9G 0% /dev
tmpfs 1.9G 0 1.9G 0% /dev/shm
tmpfs 1.9G 9.7M 1.9G 1% /run
tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
/dev/sdb1 79G 7.6G 68G 11% /opt
/dev/sda1 497M 486M 11M 98% /boot
tmpfs 379M 40K 379M 1% /run/user/1000
..........
During installation I did mount /dev/sda1 partition for the /boot with 500M. This storage is almost full (just 11M is free). Therefore, now I should clean up a given partition and enlarge a free space by deleting old and unused packages of the kernel.
!!!! DO NOT DO IT MANUALLY USING rm command!!!!
For erasing unused packages we need package-cleanup utility. It is being installed along with yum-utils package (yum install yum-utils -y).
Running
[root@server ~]# package-cleanup --oldkernels --count=1
Loaded plugins: fastestmirror, langpacks
--> Running transaction check
---> Package kernel.x86_64 0:3.10.0-862.3.3.el7 will be erased
---> Package kernel-debug.x86_64 0:3.10.0-862.3.3.el7 will be erased
---> Package kernel-devel.x86_64 0:3.10.0-862.3.3.el7 will be erased
--> Finished Dependency Resolution
Dependencies Resolved
=============================================================================================================================================
Package Arch Version Repository Size
=============================================================================================================================================
Removing:
kernel x86_64 3.10.0-862.3.3.el7 @updates 62 M
kernel-debug x86_64 3.10.0-862.3.3.el7 @updates 64 M
kernel-devel x86_64 3.10.0-862.3.3.el7 @updates 37 M
Transaction Summary
=============================================================================================================================================
Remove 3 Packages
Installed size: 162 M
Is this ok [y/N]: y
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Erasing : kernel-3.10.0-862.3.3.el7.x86_64 1/3
......................
Removed:
kernel.x86_64 0:3.10.0-862.3.3.el7 kernel-debug.x86_64 0:3.10.0-862.3.3.el7 kernel-devel.x86_64 0:3.10.0-862.3.3.el7
Complete!
Parameters that I used with a command are following:
--oldkernels - to ensure that kernel's and kernel-devel's old packages will be removed
--count=1 - Number of duplicate/kernel packages to keep on the system (default 2)
And the output of df -h command:
[root@server ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/cl_centos03-root 32G 14G 19G 43% /
devtmpfs 1.9G 0 1.9G 0% /dev
tmpfs 1.9G 0 1.9G 0% /dev/shm
tmpfs 1.9G 9.7M 1.9G 1% /run
tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
/dev/sdb1 79G 7.6G 68G 11% /opt
/dev/sda1 497M 211M 287M 43% /boot
tmpfs 379M 40K 379M 1% /run/user/1000
..................
[root@server ~]#
In this output we can see that unused files were removed and it was cleaned up 275 MB.