A bash script to check whether a string satisfies the requirements for a username.

This repo contains a zip.sh bash script that checks whether a string is a valid 5 digit zip code. It is to be used as the starting point for a script to check whether a string satisfies the requirements for a username.

The requirements for a username are:

• The only characters that can be used are
  • lower case letters,
  • digits, and
  • the underscore character
• It must start with a lower case letter
• It must contain at least three but no more than 12 characters

Copy the zip.sh file to a file named username.sh Edit the username.sh file so that it:

• Contains your name as the author
• Contains the correct name of the file
• Displays the rules to the user
• Prompts to user to type a username
• Checks to see if the string typed by the user obeys the rules.
• Prompts the user to try again if it does not.