Created
April 27, 2016 06:49
-
-
Save Repox/fab1cbe21d2a20b628d2caee27ea383c to your computer and use it in GitHub Desktop.
Shell script for adding swap to Linux
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/bin/sh | |
# size of swapfile in megabytes | |
swapsize=1024 | |
# does the swap file already exist? | |
grep -q "swapfile" /etc/fstab | |
# if not then create it | |
if [ $? -ne 0 ]; then | |
echo 'swapfile not found. Adding swapfile.' | |
fallocate -l ${swapsize}M /swapfile | |
chmod 600 /swapfile | |
mkswap /swapfile | |
swapon /swapfile | |
echo '/swapfile none swap defaults 0 0' >> /etc/fstab | |
else | |
echo 'swapfile found. No changes made.' | |
fi | |
# output results to terminal | |
df -h | |
cat /proc/swaps | |
cat /proc/meminfo | grep Swap |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
You should use dd, not fallocate! This will cause the swapfile to have holes, making it slower.