/dev/mapper/centos-root 满了

home 减少容量

卸载逻辑卷 home

umount /dev/mapper/centos-home

检测磁盘错误

e2fsck -f /dev/mapper/centos-home

缩减文件系统大小

resize2fs /dev/mapper/centos-home 522.70G

缩小逻辑卷

lvresize -L 522.70G /dev/mapper/centos-home

再次挂载

mount /dev/mapper/centos-home /home

root增加容量

首先，我们卸载掉root卷

# umount /dev/mapper/centos-root

然后，设置卷的大小为100G

# lvresize -L 100G /dev/mapper/centos-root

接下来，检查磁盘错误

# e2fsck -f /dev/mapper/centos-root

运行以下命令扩展文件系统以后，ext4信息就更新了。

# resize2fs //dev/mapper/centos-root

# xfs_growfs /dev/mapper/centos-root

参考：

https://linux.cn/article-3218-1.html

https://www.cnblogs.com/xs104/p/4642406.html

https://blog.51cto.com/dreamfire/1084729

https://www.cnblogs.com/feiyun126/p/7680534.html