An introduction to writing Bash

Lesson 1 · On the house

echo and the prompt

Print text in the shell.

Lesson 2

Variables

name=value and $name.

Lesson 3

Arguments $1 and $@

Positional parameters.

Lesson 4

exit status $?

Success is zero.

Lesson 5

if and test

Branches in Bash.

Lesson 6

for loops

Iterate words.

Lesson 7

pipes |

Connect stdout to stdin.

Lesson 8

redirects

> >> 2> and <.

Lesson 9

chmod +x and scripts

Runnable files.

Lesson 10

A small script

Args, if, and echo.