I built a couple bash scripts this week after my server crashed Thursday at 11pm

#linux #bash

My disk hit 100% on a Thursday night. Just a silent crash and a bunch of errors I found the next day.
I had nothing running in the background watching for problems.

Disk space warning** The script I needed before that Thursday happened.

`#!/bin/bash
THRESHOLD=80
USAGE=$(df / | awk 'NR==2{print $5}' | tr -d '%')

if [ "$USAGE" -gt "$THRESHOLD" ]; then
  echo "⚠ Disk at ${USAGE}% — time to act"
else
  echo "✓ Disk OK: ${USAGE}% used"
fi`

I just happened to be doing some brushing up on crontab a bit lately so I automated the script before I did anything else, so this wouldn't happen again.
Full script with email alerts → bashsnippets.xyz/snippets/disk-space-warning.html

2. Killing Processes
I also found myself continuing to fall into a ps aux | grep ""
loop after cleaning up the disk and new there was a one-word command out there that made it easier, but I couldn't recall...
I had to google it a few times before it stuck with me:

pkill/pgrep <--- turned a 4 command work-flow into a one-word workflow:
My loop was this:

ps aux | grep myapp   # find it
kill 12345            # copy/paste PID
ps aux | grep myapp   # confirm it died

After, it was this:

pgrep -l myapp
pkill -x myapp

Where this went:

So, of course, these and a few more, like error handling, turned into a free, and growing script library at bashsnippets.xyz — copy-paste ready, explained line by line, no signup.

I also started turning each one into a short video on YouTube (@bashsnippets). Hoping to gain some traction in the beginner bash communities!

Hope someone can find some use of this, but What are you automating? Drop it in the comments.