===== Swap =====

==== What is Swap? ====

[[https://en.wikipedia.org/wiki/Paging|Wikipedia - Paging]]

=== Create a (temp.) swapfile and add it to swap ===

Create a swapfile with blocksize 1024 and 2GB
<code>dd if=/dev/zero of=/swap/swapfile bs=1024 count=2M</code>
Format the file and set permissions
<code>
mkswap /swap/swapfile
chown root:root /swap/swapfile
chmod 600 /swap/swapfile
</code>
Add the swapfile to swap
<code>
swapon /swap/swapfile
</code>

=== Remove a swapfile from swap ===

List the swapfiles
<code>
swapon -s
</code>
Turn off the swapfile (used swap will be moved to other swap or memory, might take a while)\\
<code>
swapoff /swap/swapfile
</code>

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~~DISCUSSION:closed~~