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xiaohanyu/vps-swapon.sh

Created November 16, 2015 07:06
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Turn on swap memory for vps with small memory
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vps-swapon.sh
#!/bin/bash
# run it with sudo
# https://www.digitalocean.com/community/tutorials/how-to-add-swap-on-ubuntu-14-04
SWAPFILE=/swapfile
SWAPSIZE=$1
ls $SWAPFILE && swapoff $SWAPFILE && rm $SWAPFILE
fallocate -l $SWAPSIZE $SWAPFILE
chmod 600 $SWAPFILE
mkswap $SWAPFILE
swapon $SWAPFILE
grep "swapfile" /etc/fstab || echo "$SWAPFILE none swap sw 0 0" >> /etc/fstab
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