"Re-mount Disk space" Linux System/home disk space is re-attached to/root

The following is a centos7 test done on the version
Use the following command to view disk usage
ls -lh

 file system capacity used% mount point Devtmpfs  3.9G 0 3.9G 0%/devtmpfs  3.9G 0 3.9G 0%/dev/shmtmpfs  3.9G 2.9M 3.9G 1%/runtmpfs 3.9g 0 3.9G 0%/sys/fs/cgroup /dev/mapper/fedora-root 60G 46G 12G 8 1%/tmpfs  3.9G 400K 3.9G 1%/tm     P /dev/sda1 477M 141M 307M 32%/boottmpfs 787M  0 787M 0%/run/user/0/dev/mapper/fedora-home 141G 60M 134G 1%/Home 

/dev/mapper/fedora-homeThe corresponding mount directory is/home
/dev/mapper/fedora-rootThe corresponding mount directory is/root
From the list above /dev/mapper/fedora-home , we can see that the catalogue is very large, but we are /dev/mapper/fedora-root very small now, how can we move the space in the past? Use the following actions

The following steps demonstrate the space size of mobile/home 1G to/root canceling the/home directory mount

Umount-v/Home

check the disks to be transferred

E2fsck-ff  /dev/mapper/fedora-home# 5 Steps for this command operation result must all be passed

The results are shown below

E2fsck 1.42.13 (17-may-20154: Checking reference counts 5th step: Check Cluster summary information /dev/mapper/fedora-home:130190/ 10838016 files (0.1% non-contiguous), 8077341/43338752 blocks

Change the/dev/mapper/fedora-home disk size

Calculation steps: 141G-Transfer 1g = 140G

Resize2fs/dev/mapper/fedora-home  140G

Cut disk space

Lvreduce-l -1g/dev/mapper/fedora-home

Re-mount Home/home

Mount-v/Home

Transfer to/root

Lvextend-l+1g/dev/mapper/fedora-root

Make/root space Effective

Resize2fs/dev/mapper/fedora-root

"Re-mount Disk space" Linux System/home disk space is re-attached to/root