Take a minute to review what you’ve learned about bash scripting.

• Any command that can be run in the terminal can be run in a bash script.
• Variables are assigned using an equals sign with no space (greeting="hello").
• Variables are accessed using a dollar sign (echo $greeting).
• Conditionals use if, then, else, fi syntax.
• Three types of loops can be used: for, while, and until.
• Bash scripts use a unique set of comparison operators:
  • Equal: -eq
  • Not equal: -ne
  • Less than or equal: -le
  • Less than: -lt
  • Greater than or equal: -ge
  • Greater than: -gt
  • Is null: -z
• Input arguments can be passed to a bash script after the script name, separated by spaces (myScript.sh “hello” “how are you”).
• Input can be requested from the script user with the read keyword.
• Aliases can be created in the .bashrc or .bash_profile using the alias keyword.