Linux centos7 终端下使用cfdisk创建新的文件系统分区

上次aws给的云主机硬盘一般系统分区只占用一小部分，这就意味着要自己手动合理分区，如下：

[root@ip-172-31-28-5 ]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/xvda1 40G 1.1G 37G 3% /
devtmpfs 7.3G 0 7.3G 0% /dev
tmpfs 7.2G 0 7.2G 0% /dev/shm
tmpfs 7.2G 8.3M 7.2G 1% /run
tmpfs 7.2G 0 7.2G 0% /sys/fs/cgroup
tmpfs 1.5G 0 1.5G 0% /run/user/22585
[root@ip-172-31-28-5 ]# fdisk -l

Disk /dev/xvda: 859.0 GB, 858993459200 bytes, 1677721600 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 label type: dos
Disk identifier: 0x000273a4

Device Boot Start End Blocks Id System
/dev/xvda1 * 2048 83886079 41942016 83 Linux

我们通过lsblk查看一下：

[root@ip-172-31-28-5 ]# lsblk 
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
xvda 202:0 0 800G 0 disk 
└─xvda1 202:1 0 40G 0 part /

如上，/dev/xvda这块硬盘一共859G，系统只是占用了不到50G，这时，就需要我们来重新划分剩余的空间到新分区

我这里是通过CFdisk 创建一个基本的 Linux 分区，如下：

cfdisk /dev/xvda

我们再通过上下键滑动到空闲的部位，如下图：

请使用箭头键选择 [ NEW ]，然后按 Enter 键

然后按 Enter 键

我这里默认只要一个区，所有我直接把所有剩余空间全给了，按Enter键

选到write这一项，按Enter键

输入yes,按Enter键

通过左右键，先到Quit，按Enter键

然后，通过命令查看一下，新的分区好了没，如下：

[root@ip-172-31-28-5 xubo-iri]# fdisk -l

Disk /dev/xvda: 859.0 GB, 858993459200 bytes, 1677721600 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 label type: dos
Disk identifier: 0x000273a4

Device Boot Start End Blocks Id System
/dev/xvda1 * 2048 83886079 41942016 83 Linux
/dev/xvda2 83886080 1677721599 796917760 83 Linux

然后我们使用partprobe命令加载一下新分区，如下：

[root@ip-172-31-28-5 ]# partprobe
[root@ip-172-31-28-5 ]# ls /dev/xvda*
/dev/xvda /dev/xvda1 /dev/xvda2

然后格式化/dev/xvda2(刚才创建的新分区)

[root@ip-172-31-28-5 ]# mkfs.ext4 /dev/xvda2
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
49807360 inodes, 199229440 blocks
9961472 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2346713088
6080 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks: 
 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 
 4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, 
 102400000

Allocating group tables: done 
Writing inode tables: done 
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

然后挂载新分区

[root@ip-172-31-28-5]# mount /dev/xvda2 /data
[root@ip-172-31-28-5]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/xvda1 40G 1.1G 37G 3% /
devtmpfs 7.3G 0 7.3G 0% /dev
tmpfs 7.2G 0 7.2G 0% /dev/shm
tmpfs 7.2G 8.3M 7.2G 1% /run
tmpfs 7.2G 0 7.2G 0% /sys/fs/cgroup
tmpfs 1.5G 0 1.5G 0% /run/user/22585
/dev/xvda2 748G 73M 710G 1% /data

好，到处结束