Shell

• UNIX & Linux コマンド・シェルスクリプト リファレンス
  • http://www.geocities.jp/geo_sunisland/

• 【永久保存版】シェルスクリプト完全攻略ガイド
  • https://qiita.com/osw_nuco/items/a5d7173c1e443030875f

• Shebang

ノウハウ

• Tips: 実行中のシェルスクリプトを書きかえるときには
  • https://qiita.com/kitsuyui/items/d0048eeaa50293a92a60

• The first two statements of your BASH script should be…
  • https://ashishb.net/all/the-first-two-statements-of-your-bash-script-should-be/

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

“set -e” which ensures that your script stops on first command failure. By default, when a command fails, BASH executes the next command. Looking at the logs, you might feel that the script executed successfully while some commands might have failed. Caveat: Be careful about applying it to existing scripts.

“set -u” which ensures that your script exits on the first unset variable encountered. Otherwise, bash replaces the unset variables with empty default values.

“set -o pipefail” which ensures that if any command in a set of piped commands failed, the overall exit status is the status of the failed command. Othe

• bash スクリプトの実行中上書き動作について
  • https://zenn.dev/mattn/articles/5af86b61004bdc