缩减AWS根磁盘

1.创建一个与旧系统同样系统的虚拟机,选择最小化配置省钱。

2.停止新虚机,把磁盘解除挂载。

3.将磁盘挂载到老虚机上

4.建立挂载点,挂载磁盘:

mkdir /new
mount /dev/nvme1n1p1 /new

4.删除/new/中除了”/dev/*”,”/proc/*”,”/sys/*”,”/tmp/*”,”/run/*”,”/mnt/*”,”/media/*”,”/lost+found”,”/new”,”/var/lock/*”,”/boot/*”, “/etc/fstab” 之外的所有文件、目录。

5.拷贝所有内容到新磁盘:

rsync -aAXv / --exclude={"/dev/*","/proc/*","/sys/*","/tmp/*","/run/*","/mnt/*","/media/*","/lost+found","/new","/var/lock/*","/boot/*", "/etc/fstab"} /new

6.将新磁盘挂回新虚机,更新重新安装内核。

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