How do i add file swap space to ubuntu?

giantpanda

Create a file for your swap space, using fallocate. fallocate man page: http://bit.ly/2qcsRnB

$ sudo fallocate -l 1G /swapspace

Make that file into a linux swap area. mkswap man page: http://bit.ly/2pFr5Kt

$ sudo mkswap /swapspace
Setting up swapspace version 1, size = 1024 MiB (1073737728 bytes)
no label, UUID=a80e9iedb-bdaf-4f44-9882-6e877bc79643

Secure & Activate the swap space. swapon man page: http://bit.ly/2r977c9

$ sudo chmod 600 /swapspace
$ sudo swapon /swapspace

Make it permanent to ensure swap is enabled on reboot. Edit /etc/fstab and a line.

/swapspace            none swap    sw              0       0