Quick Bash: Check Argument Count

Brandon Rozek

December 15, 2020

I’ve been writing more bash scripts recently and I noticed that I often check for the number of arguments before validating them in my scripts. I’ll share that small snippet here for my future self.


set -o errexit
set -o nounset
set -o pipefail

show_usage() {
    echo "Usage: script [arg1]"
    exit 1

# Check argument count
if [ "$#" -ne 1 ]; then