一、查看当前已经分配磁盘的空间情况 df -h root@******# df -h Filesystem Size Used Avail Use% Mounted on udev 126G 0 126G 0% /dev tmpfs 26G 35M 26G 1% /run tmpfs 126G 0 126G 0% /dev/shm /dev/sdb1 454G 31G 401G 8% / tmpfs 5.0M 0 5.0M 0% /run/lock tmpfs 126G 0 126G 0% /sys/fs/cgroup tmpfs 26G 28K 26G 1% /run/user/117 tmpfs 26G 28K 26G 1% /run/user/1000 发现新加的硬盘并没有挂载上来， 其中，系统默认磁盘是在/dev/sdb1上 二、查看当前磁盘的大小 fdisk -l root@****# fdisk -l Disk /dev/sda: 3.7 TiB, 4000787030016 bytes, 7814037168 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk /dev/sdb: 3.7 TiB, 4000787030016 b...