1. Run the following command to check the size of the existing disk:

   fdisk -l

   In the following example command output, the size of the /dev/vda disk is 100 GiB:

   [root@ecshost ~]# fdisk -l
   Disk /dev/vda: 107.4 GB, 107374182400 bytes, 209715200 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: 0x000bad2b
   
      Device Boot      Start         End      Blocks   Id  System
   /dev/vda1   *        2048    83886046    41941999   83  Linux

2. Run the following command to check the size of the partition and the type of the file system:

   df -Th

   In the following example command output, the size of the /dev/vda1 partition is 40 GiB, and the type of the file system is ext4:

   [root@ecshost ~]# df -Th
   Filesystem     Type      Size  Used Avail Use% Mounted on
   devtmpfs       devtmpfs  869M     0  869M   0% /dev
   tmpfs          tmpfs     879M     0  879M   0% /dev/shm
   tmpfs          tmpfs     879M  460K  878M   1% /run
   tmpfs          tmpfs     879M     0  879M   0% /sys/fs/cgroup
   /dev/vda1      ext4       40G  1.8G   36G   5% /
   tmpfs          tmpfs     176M     0  176M   0% /run/user/0

3. Run the following command to resize partitions:

   growpart <DeviceName> <PartionNumber>

   In the following example command output, the first partition /dev/vda1 of the system disk is resized:

   [root@ecshost ~]# growpart /dev/vda 1
   CHANGED: partition=1 start=2048 old: size=83883999 end=83886047 new: size=209713119 end=209715167

   Note If the unexpected output in sfdisk –version [sfdisk, from util-linux 2.23.2] error is prompted when the growpart /dev/vda 1 command is run, try to change the character encoding to fix the problem. For more information, see FAQ.
4. Resize the file system.
   Use the df -Th command to check the type of the file system. Then, select one of the following methods to resize the file system based on the type of the file system:

   • If the type of the file system is ext* such as ext3 and ext4, run the following command to resize the file system:

     resize2fs <PartitionName>

     In the following example, the file system of the /dev/vda1 partition is resized:

     [root@ecshost ~]# resize2fs /dev/vda1
     resize2fs 1.42.9 (28-Dec-2013)
     Filesystem at /dev/vda1 is mounted on /; on-line resizing required
     old_desc_blocks = 3, new_desc_blocks = 7
     The filesystem on /dev/vda1 is now 26214139 blocks long.

   • If the type of the file system is XFS, run the following command to resize the file system:

     xfs_growfs <mountpoint>

     In the following example, the file system of the /dev/vda1 partition is resized. The mount point of the /dev/vda1 partition is the / root directory.

     [root@ecshost ~]# xfs_growfs /
     meta-data=/dev/vda1              isize=512    agcount=13, agsize=1310656 blks
              =                       sectsz=512   attr=2, projid32bit=1
              =                       crc=1        finobt=1, sparse=1, rmapbt=0
              =                       reflink=1
     data     =                       bsize=4096   blocks=15728379, imaxpct=25
              =                       sunit=0      swidth=0 blks
     naming   =version 2              bsize=4096   ascii-ci=0, ftype=1
     log      =internal log           bsize=4096   blocks=2560, version=2
              =                       sectsz=512   sunit=0 blks, lazy-count=1
     realtime =none                   extsz=4096   blocks=0, rtextents=0
     data blocks changed from 15728379 to 20971259

     Note The commands may vary depending on versions of the xfs_growfs tool. Run xfs_growfs –help to check the corresponding commands.
5. Run the following command to check the size of the disk partition:

   df -h

   The following example shows that the size of the /dev/vda1 partition is 100 GiB. This indicates that the partition is resized.

   [root@ecshost ~]# df -h
   Filesystem      Size  Used Avail Use% Mounted on
   devtmpfs        869M     0  869M   0% /dev
   tmpfs           879M     0  879M   0% /dev/shm
   tmpfs           879M  492K  878M   1% /run
   tmpfs           879M     0  879M   0% /sys/fs/cgroup
   /dev/vda1        99G  1.8G   93G   2% /
   tmpfs           176M     0  176M   0% /run/user/0

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