centos 磁盘扩容: 将/dev/mapper/centos-home的磁盘扩容到/dev/mapper/centos-root中。

# 卸载 /dev/mapper/centos-home
sudo umount /dev/mapper/centos-home

# 移除逻辑卷 /dev/mapper/centos-home 并自动确认
echo "y" | sudo lvremove /dev/mapper/centos-home

# 扩展根分区 /dev/mapper/centos-root
sudo lvextend -l +100%FREE /dev/mapper/centos-root

# 扩展文件系统
sudo resize2fs /dev/mapper/centos-root