README.md

Bash Cheat Sheet

• Reference
• Cheat Sheet by devhints
• Lint with shellcheck:

find . -name '*.sh' -print0 | xargs -0 shellcheck -s bash

Lib

• echorun
• try

My strict mode

#!/usr/bin/env bash
set -euo pipefail

• See also: redsymbol, disconnected.

rand-str

LC_ALL=C tr -dc A-Za-z0-9 </dev/urandom | head -c 64

Explained

shared_args

shared_args=(
  --some "$value_with_spaces"
  "$etc"
)

if condition
then shared_args+=(--more)
fi

command1 --args1 "${shared_args[@]}"
command2 --args2 "${shared_args[@]}"

Single square brackets silent bug

A=""
if [ -n "$A"]
then echo "not empty"
else echo "empty"
fi

• Detected with shellcheck.