Linux Centos7把/home空间合并到/(根目录)

# 1.查看挂载磁盘
df -h

# 2.卸载/home
umount /home

# 3.删除/home所在的lv
lvremove /dev/mapper/centos-home

# 4.查看物理卷
vgdisplay
# Free  PE / Size这项就是你可分配容量

# 5.扩展根目录lv
lvextend -L +50G /dev/mapper/centos-root
xfs_growfs /dev/mapper/centos-root

# 6.检查是否成功
df -h