centos7 下删除 /home 分区

步骤

查看当前的分区结构

[root@localhost ~]# cat /etc/fstab

#
# /etc/fstab
# Created by anaconda on Thu Jun 13 10:26:50 2024
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/centos-root /                       xfs     defaults        0 0
UUID=644e8a4c-b0dd-4fe6-a6d7-f0e06c273aa8 /boot                   xfs     defaults        0 0
/dev/mapper/centos-home /home                   xfs     defaults        0 0
/dev/mapper/centos-swap swap                    swap    defaults        0 0

取消 /home 盘挂载

umount /home/

删除 /home 对应的分区,加到 / 根目录下

lvremove /dev/mapper/centos-home
lvextend -l  +100%free /dev/mapper/centos-root

刷新一下操作

xfs_growfs /dev/mapper/centos-root

注释掉 /etc/fstab 分区中对 home 分区的描述(示例注释的第三行)，避免开机后的从新分区

/dev/mapper/centos-root /                       xfs     defaults        0 0
UUID=644e8a4c-b0dd-4fe6-a6d7-f0e06c273aa8 /boot                   xfs     defaults        0 0
#/dev/mapper/centos-home /home                   xfs     defaults        0 0
/dev/mapper/centos-swap swap                    swap    defaults        0 0

注意

1. lventend 作用是扩展逻辑卷，xfs_growfs 是将xfs 文件系统扩展
2. 该方法只适用于 xfs文件系统，且卸载整个的 /home 目录，而不是按照指定值缩小