13/12/13

Linux command

1. Kiểm tra lại dung lượng các HDD đã có:

[root@centos ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 14G 5.9G 7.4G 45% /
/dev/sda1 190M 11M 170M 7% /boot
tmpfs 252M 0 252M 0% /dev/shm

2. Fdisk ổ đĩa mới thêm vào. (Chú ý : phải dùng User: root)

[root@centos /]# fdisk /dev/sdb
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel. Changes will remain in memory only,
until you decide to write them. After that, of course, the previous
content won't be recoverable.
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
Command (m for help): m
----------
Command (m for help): p
Disk /dev/sdb: 2147 MB, 2147483648 bytes
255 heads, 63 sectors/track, 261 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
-------------------
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
----------------------

3. Tạo hệ thống file, sau khi phân vùng đã được tạo

[root@centos /]# mkfs -V -t ext3 /dev/sdb
mkfs (util-linux 2.13-pre7)
mkfs.ext3 /dev/sdb
mke2fs 1.39 (29-May-2006)
/dev/sdb is entire device, not just one partition!
Proceed anyway? (y,n) y
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
262144 inodes, 524288 blocks
26214 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=536870912
16 block groups
32768 blocks per group, 32768 fragments per group
16384 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912
Writing inode tables: done
Creating journal (16384 blocks): done
Writing superblocks and filesystem accounting information:
done
This filesystem will be automatically checked every 21 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.