Linux/Ubuntu/LinuxMint: Set up a swap file

I forgot to set up a swap partition during setup, so figured I'd use a swap file instead, in case I messed up the Mac OSX boot partition.

First, create an empty file. To know how much you need, see here. In this example, I'm using a 1GB (1024mb) swap file. Use the following command to make it:

sudo mkdir /swapfile

sudo dd if=/dev/zero of=/swapfile/1024mb.swap bs=1024 count=1048576

Now convert it into a swapfile by typing:

sudo mkswap /swapfile/1024mb.swap

Now to install it!

sudo swapon /swapfile/1024mb.swap

Check if it works. The file should now be listed after typing:

swapon -s

And lastly, automate it so it's used after ever reboot.

sudo vi /etc/fstab

Add in the following line at the end (each part is separated by tabs)

/swapfile/1024mb.swap    none    swap    sw    0    0

You now have more power! 


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