一、分区扩容
思路：parted先删除原有分区， 重建分区，用e2fsck检查一下分区， 再用resize2fs扩容分区文件系统
[root@kvm ~]# fuser -m -k /home //结束占用home的进程，可以加一个-i 参数，杀死一个程序前，会询问
[root@kvm ~]# umount /home
[root@kvm ~]# parted /dev/sdc
GNU Parted 3.1
Using /dev/sdc
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted)print
Model: VMware, VMware Virtual S (scsi)
Disk /dev/sdc: 21.5GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 1049kB 5000MB 4999MB ext4
(parted) rm 1 //删除分区重建
(parted) mkpart
Partition name? []?
File system type? [ext2]?
Start? 1049kB
End? 100%
(parted) print
Model: VMware, VMware Virtual S (scsi)
Disk /dev/sdc: 21.5GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 1049kB 21.5GB 21.5GB ext4
(parted) quit
Information: You may need to update /etc/fstab.
[root@kvm ~]# e2fsck -f /dev/sdc1 //检查分区
e2fsck 1.42.9 (28-Dec-2013)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
/dev/sdc1: 12/305216 files (0.0% non-contiguous), 56703/1220352 blocks
[root@kvm ~]# resize2fs /dev/sdc1 //扩容分区
resize2fs 1.42.9 (28-Dec-2013)
Resizing the filesystem on /dev/sdc1 to 5242368 (4k) blocks.
The filesystem on /dev/sdc1 is now 5242368 blocks long.
[root@kvm ~]# mount /dev/sdc1 /home //重新挂载分区
[root@kvm ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 899M 0 899M 0% /dev
tmpfs 910M 0 910M 0% /dev/shm
tmpfs 910M 50M 861M 6% /run
tmpfs 910M 0 910M 0% /sys/fs/cgroup
/dev/mapper/centos-root 9.0G 2.1G 6.9G 23% /
/dev/sda1 1014M 187M 828M 19% /boot
tmpfs 182M 0 182M 0% /run/user/0
/dev/sdc1 20G 26M 19G 1% /home
