Extending partition

extending_partition.txt

# fdisk -l
Disk /dev/vda: 200 GiB, 214748364800 bytes, 419430400 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
Disklabel type: dos
Disk identifier: 0xa236c89b

Device     Boot     Start       End   Sectors Size Id Type
/dev/vda1  *         2048 201326591 201324544  96G 83 Linux
/dev/vda2       201326592 209715199   8388608   4G 82 Linux swap / Solaris

# swapoff /dev/vda2

# fdisk /dev/vda
# d - delete both partitions
# n - create primary partition 1 with ext4 (type 83), side +196G
# a - mark partition as bootable
# n - create 2 primary partition
# t - change type partition 2 to swap (type 82)

Command (m for help): p
Disk /dev/vda: 200 GiB, 214748364800 bytes, 419430400 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
Disklabel type: dos
Disk identifier: 0xa236c89b

Device     Boot     Start       End   Sectors  Size Id Type
/dev/vda1  *         2048 411043839 411041792  196G 83 Linux
/dev/vda2       411043840 419430399   8386560    4G 82 Linux swap / Solaris

Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
Re-reading the partition table failed.: Device or resource busy

The kernel still uses the old table. The new table will be used at the next reboot or after you run partprobe(8) or kpartx(8).

# reboot

# resize2fs /dev/vda1
resize2fs 1.42.13 (17-May-2015)
Filesystem at /dev/vda1 is mounted on /; on-line resizing required
old_desc_blocks = 6, new_desc_blocks = 13
The filesystem on /dev/vda1 is now 51380224 (4k) blocks long.

# blkid          
/dev/vda1: UUID="ed850358-01f6-4bb0-9121-7632dd3970d8" TYPE="ext4" PARTUUID="a236c89b-01"
/dev/vda2: PARTUUID="a236c89b-02"

# cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
UUID=ed850358-01f6-4bb0-9121-7632dd3970d8 /               ext4    errors=remount-ro 0       1
/dev/fd0        /media/floppy0  auto    rw,user,noauto,exec,utf8 0       0
UUID=c6a66cfd-4502-45a6-88aa-09db16f1342b none swap sw 0 0
  
# mkswap /dev/vda2
Setting up swapspace version 1, size = 4 GiB (4293914624 bytes)
no label, UUID=ce27b1d2-b933-4270-95a9-fdadfba0d205

# blkid
/dev/vda1: UUID="ed850358-01f6-4bb0-9121-7632dd3970d8" TYPE="ext4" PARTUUID="a236c89b-01"
/dev/vda2: UUID="ce27b1d2-b933-4270-95a9-fdadfba0d205" TYPE="swap" PARTUUID="a236c89b-02"

# swapon -U ce27b1d2-b933-4270-95a9-fdadfba0d205

# mcedit /etc/fstab

# cat /etc/fstab 
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
UUID=ed850358-01f6-4bb0-9121-7632dd3970d8 /               ext4    errors=remount-ro 0       1
/dev/fd0        /media/floppy0  auto    rw,user,noauto,exec,utf8 0       0
UUID=ce27b1d2-b933-4270-95a9-fdadfba0d205 none swap sw 0 0