Script to get the ID of a Docker container by its name

getcontainerid.sh

#!/bin/bash

containername=$1
# Feed the list of currently running containers into an Awk script that declares the container name a variable and then gets the outputs of running it as a regex pattern, printing the first word
id=$(docker ps | awk -v containername="$containername" '$0 ~ containername{print $1}');
# Check if there is an image ID or not
if [[ -z $id ]]; then
	echo "No images match that pattern. Try broadening your search, you can enter regex patterns to this command to if you'd like, but be aware of Awk syntax.";
else
	echo "$id";
fi