Swap

Enable swap in file

Create large file and set up a Linux swap area, enable file for paging and swapping:

$ dd if=/dev/zero of=/swapfile bs=1024 count=524288
$ mkswap -v1 /swapfile
$ sudo swapon /swapfile
$ sync

Insure that all fine:

$ dmesg | tail
...
$ cat /proc/swaps
 ...

Add line to /etc/fstab:

/swapfile   swap        swap    defaults    0   0