Swap

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Usage

Turn off swap

swapoff --all --verbose

Turn of swap

swapon --all --verbose

Create a swap partition

see fdisk

Enable swap partion

Check that the swap is not used yet

free -m

Set up a swap area. In this case for the create swap partition sda2. Use fdisk -l to list all partitions and find the right one.

mkswap /dev/sda2
swapon /dev/sda2

Save the UUID the command outputs or use blkid to print the UUIDs of all partitions. Add in the file /etc/fstab the line

# <file system> <mount point> <type> <options> <dump> ::<pass>
UUID=<uuid>     none          swap   sw        0      0

Check usage status

Check swap is used

$ swapon --show
NAME      TYPE      SIZE USED PRIO
/dev/sdb3 partition 20G  0B   -1

$ cat /proc/swaps
Filename  Type       Size    Used  Priority
/dev/sa2  partition  681574  0     -1

Tips

Switch swap partion

  • Create a new swap partition and enable it
  • Turn off the swap
  • Delete the entry of the old swap partiton from /etc/fstab and delete the old swap partition
  • Enable the swap

See also

External links