# Making a Swap File

> sudo mkdir -v /var/cache/swap

> cd /var/cache/swap

> sudo dd if=/dev/zero of=swapfile bs=1K count=4M

This creates a swapfile of (1k x 4M) 4 Gigs.
Change 4M to XM for an XGig swap.

> sudo chmod 600 swapfile

> sudo mkswap swapfile

> sudo swapon swapfile

Test it's working with top

> top -bn1 | grep -i swap

or:

> echo "/var/cache/swap/swapfile none swap sw 0 0" | sudo tee -a /etc/fstab

Test it'll work at boot with:

> sudo swapoff swapfile

> sudo swapon -va

# Partition Swaps

Put this in /etc/fstab:

`UUID=blah-blah none swap sw 0 0`

Then test it works with:

> sudo swapon -va

Test other partitions in fstab with:

> sudo mount -a