Adjust the home partition in Centos 7 to expand the root partition.

Adjust the home partition in Centos 7 to expand the root partition.

Back up/home content, delete the logical volume of the/home file system, expand/root file system, create/home, and restore/home content

1. View partitions

df -h

2. Back up the home partition File

tar cvf /tmp/home.tar /home

3. Uninstall/home. If uninstallation fails, terminate the process of using the/home file system.

fuser -km /home/umount /home 

4. Delete the lv of/home

lvremove /dev/mapper/centos-home

5. Increase the lv of the extended/root instance by 800 GB.

 lvextend -L +800G /dev/mapper/centos-root

6. Extended/root file system

xfs_growfs /dev/mapper/centos-root

7. Recreate home lv

lvcreate -L 73G -n /dev/mapper/centos-home 

8. Create a File System

 mkfs.xfs  /dev/mapper/centos-home

9. Mount home

mount /dev/mapper/centos-home

10. Restore the home file

tar xvf /tmp/home.tar -C /home/cd /home/home/mv * ../