Lesson 23 / 29
Your First Bash Script
From a text file to an executable script.
The shebang
A script's first line, #!/bin/bash, tells the OS which interpreter should run it — this is the shebang.
Write and run it
Save the script, make it executable, then run it.
#!/bin/bash
echo "Hello, $(whoami)!"Output:
Hello, alice!
chmod +x to run it
Save as greet.sh, run chmod +x greet.sh, then execute with ./greet.sh.