swap

Making a Swap File

1cd /var/cache/

1sudo 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.

1sudo chmod 600 swapfile

1sudo mkswap swapfile

1sudo swapon swapfile

Test it's working with top

1top -bn1 | grep -i swap

or:

1echo "/var/cache/swapfile none swap sw 0 0" | sudo tee -a /etc/fstab

Test it'll work at boot with:

1sudo swapoff swapfile

1sudo swapon -va

Put this in /etc/fstab:

UUID=blah-blah none swap sw 0 0

Then test it works with:

1sudo swapon -va

Test other partitions in fstab with:

1sudo mount -a