linux挂载分区

 [root@localhost ~]# df -h
 Filesystem            Size  Used Avail Use% Mounted on
 /dev/xvda2             36G  .3G   32G   % /
 tmpfs                  15G        15G   % /dev/shm
 [root@localhost ~]# fdisk -l

 Disk /dev/xvda: 42.9 GB,  bytes
  heads,  sectors/track,  cylinders
 Units = cylinders of  *  =  bytes
 Sector size (logical/physical):  bytes /  bytes
 I/O size (minimum/optimal):  bytes /  bytes
 Disk identifier: 0x00014faa

     Device Boot      Start         End      Blocks   Id  System
 /dev/xvda1                                  Linux swap / Solaris
 Partition  does not end on cylinder boundary.
 /dev/xvda2   *                          Linux

 Disk /dev/xvde: 493.9 GB,  bytes
  heads,  sectors/track,  cylinders
 Units = cylinders of  *  =  bytes
 Sector size (logical/physical):  bytes /  bytes
 I/O size (minimum/optimal):  bytes /  bytes
 Disk identifier: 0x00000000

 [root@localhost ~]# fdisk /dev/xvde
 Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
 Building a new DOS disklabel with disk identifier 0xb28f7207.
 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  will be corrected by w(rite)

 WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
          switch off the mode (command 'c') and change display units to
          sectors (command 'u').

 Command (m for help): p^H

 Disk /dev/xvde: 493.9 GB,  bytes
  heads,  sectors/track,  cylinders
 Units = cylinders of  *  =  bytes
 Sector size (logical/physical):  bytes /  bytes
 I/O size (minimum/optimal):  bytes /  bytes
 Disk identifier: 0xb28f7207

     Device Boot      Start         End      Blocks   Id  System

 Command (m for help): m
 Command action
    a   toggle a bootable flag
    b   edit bsd disklabel
    c   toggle the dos compatibility flag
    d   delete a partition
    l   list known partition types
    m   print this menu
    n   add a new partition
    o   create a new empty DOS partition table
    p   print the partition table
    q   quit without saving changes
    s   create a new empty Sun disklabel
    t   change a partition's system id
    u   change display/entry units
    v   verify the partition table
    w   write table to disk and exit
    x   extra functionality (experts only)

 Command (m for help): n
 Command action
    e   extended
    p   primary partition (-)
 p
 Partition number (-):
 First cylinder (-, default ):
 Using default value
 Last cylinder, +cylinders or +size{K,M,G} (-, default ):
 Using default value 

 Command (m for help): w
 The partition table has been altered!

 Calling ioctl() to re-read partition table.
 Syncing disks.
 [root@localhost ~]# partprobe
 Warning: WARNING: the kernel failed to re-read the partition table on /dev/xvda (Device or resource busy).  As a result, it may not reflect all of your changes until after reboot.
 Warning: Unable to open /dev/sr0 read-write (Read-only file system).  /dev/sr0 has been opened read-only.
 [root@localhost ~]# fdisk -l

 Disk /dev/xvda: 42.9 GB,  bytes
  heads,  sectors/track,  cylinders
 Units = cylinders of  *  =  bytes
 Sector size (logical/physical):  bytes /  bytes
 I/O size (minimum/optimal):  bytes /  bytes
 Disk identifier: 0x00014faa

     Device Boot      Start         End      Blocks   Id  System
 /dev/xvda1                                  Linux swap / Solaris
 Partition  does not end on cylinder boundary.
 /dev/xvda2   *                          Linux

 Disk /dev/xvde: 493.9 GB,  bytes
  heads,  sectors/track,  cylinders
 Units = cylinders of  *  =  bytes
 Sector size (logical/physical):  bytes /  bytes
 I/O size (minimum/optimal):  bytes /  bytes
 Disk identifier: 0xb28f7207

     Device Boot      Start         End      Blocks   Id  System
 /dev/xvde1                              Linux
 [root@localhost ~]# mkfs.ext3 /dev/xvde1
 mke2fs 1.41. (-May-)
 Filesystem label=
 OS type: Linux
 Block size= (log=)
 Fragment size= (log=)
 Stride= blocks, Stripe width= blocks
  inodes,  blocks
  blocks (5.00%) reserved for the super user
 First data block=
 Maximum filesystem blocks=
  block groups
  blocks per group,  fragments per group
  inodes per group
 Superblock backups stored on blocks:
     , , , , , , , , ,
     , , , , , , , 

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

 This filesystem will be automatically checked every  mounts or
  days, whichever comes first.  Use tune2fs -c or -i to override.
 [root@localhost ~]# fdisk -l

 Disk /dev/xvda: 42.9 GB,  bytes
  heads,  sectors/track,  cylinders
 Units = cylinders of  *  =  bytes
 Sector size (logical/physical):  bytes /  bytes
 I/O size (minimum/optimal):  bytes /  bytes
 Disk identifier: 0x00014faa

     Device Boot      Start         End      Blocks   Id  System
 /dev/xvda1                                  Linux swap / Solaris
 Partition  does not end on cylinder boundary.
 /dev/xvda2   *                          Linux

 Disk /dev/xvde: 493.9 GB,  bytes
  heads,  sectors/track,  cylinders
 Units = cylinders of  *  =  bytes
 Sector size (logical/physical):  bytes /  bytes
 I/O size (minimum/optimal):  bytes /  bytes
 Disk identifier: 0xb28f7207

     Device Boot      Start         End      Blocks   Id  System
 /dev/xvde1                              Linux
 [root@localhost ~]# vim /etc/fstab
 [root@localhost ~]# cat /etc/fstab 

 #
 # /etc/fstab
 # Created by anaconda on Tue Mar  ::
 #
 # Accessible filesystems, by reference, are maintained under '/dev/disk'
 # See man pages fstab(), findfs(), mount() and/or blkid() for more info
 #
 UUID=5056bbc2-cf00-4f7c-95e1-35be323fc523 /                       ext3    defaults
 UUID=c2a7b4a1-c806-46e5-a97d-b9a964fc9e05 swap                    swap    defaults
 tmpfs                   /dev/shm                tmpfs   defaults
 devpts                  /dev/pts                devpts  gid=,mode=
 sysfs                   /sys                    sysfs   defaults
 proc                    /proc                   proc    defaults
 /dev/xvde1              /opt/                   ext3    defaults
 [root@localhost ~]# mount -a
 [root@localhost ~]# df -h
 Filesystem            Size  Used Avail Use% Mounted on
 /dev/xvda2             36G  .3G   32G   % /
 tmpfs                  15G        15G   % /dev/shm
 /dev/xvde1            453G  199M  430G   % /opt