Welcome

#!/bin/bash
NAME='Hoang'
echo 'Hi, I was learned BASH SCRIPT in there!'
echo "I'm $NAME"

Reference:

• https://devhints.io/bash
• https://www.macs.hw.ac.uk/~hwloidl/Courses/LinuxIntro/t1.html
• https://ryanstutorials.net/bash-scripting-tutorial/bash-script.php
• http://linuxcommand.org/lc3_wss0010.php
• http://matt.might.net/articles/bash-by-example/
• https://www.shellscript.sh/index.html

Debug:

• https://www.peterbe.com/plog/set-ex
• https://kvz.io/blog/2013/11/21/bash-best-practices/