====== FreeBSD: swap on file ======
\\

Create the swap file:

<file bash>
dd if=/dev/zero of=/swap0 bs=1m count=300
chmod 0600 /swap0
echo  "md99	none	swap	sw,file=/usr/swap0,late	0	0" >> /etc/fstab
</file>

\\ The md(4) device md99 is used, leaving lower device numbers available for interactive use.
\\ Swap space will be added on system startup. 
\\ To add swap space immediately, use swapon(8):
<file bash>
swapon -aL
</file>

<note warning>Remember to remove from /etc/fstab any unused swap entry.</note>


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