磁盘合并

cd / && tar -zcvf home.tar.gz /home
umount /home
fuser -m /dev/mapper/cl-home
kill -9 "上边带m的数字杀掉"
umount /home
lvremove /dev/cl/home
lvextend -l +100%FREE /dev/cl/root
xfs_growfs /dev/cl/root
tar -zxvf home.tar.gz
ll home
vim /etc/fstab
将 home 挂载点注释或删除，保存并退出即可。
#/dev/mapper/cl-home /home xfs defaults 0 0