How to resize partitions in CentOS7

Yesterday, I helped someone install a system and forgot to click on the automatic partitioning. The size of the automatic partition was very unsuitable for daily use.

Execute the command: df -h

You can see that the system automatically allocates all the remaining space to the home partition, but we usually use the space under the root partition, so we must move the excess space under home to the root partition.

First, you need to back up the contents of the home folder. Execute the command: cp -r /home/ homebak/ (If no other accounts are created in the new system, you do not need to back up)

Unmount home: umount /home (If there are processes under home, use fuser -m -v -i -k /home to terminate the processes under home, and finally use umount /home to unmount /home)

Delete the home sector: lvremove /dev/mapper/centos-home

Add 100G to the sector where root is located: lvextend -L +100G /dev/mapper/centos-root

Expand the root file system: xfs_growfs /dev/mapper/centos-root

Recreate home lv: lvcreate -L 64G -n home centos (the 64G here is the original space minus the space moved away, not randomly filled)

Create a file system: mkfs.xfs /dev/centos/home

Mount home: mount /dev/centos/home /home

cp the backed up stuff back to home and delete the backup;

The above is the full content of this article. I hope it will be helpful for everyone’s study. I also hope that everyone will support 123WORDPRESS.COM.