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README.md

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Linux Password Generator

Default usage

    ./password_gen.sh

The default password length is 36 characters and the default style includes A-Z, a-z, 0-9.
Both of those defaults are easy to tweak using the optional flags.

Optional flags

Use the optional -h flag for help.

./password_gen.sh -h
./password_gen.sh --help

Use the optional -l flag to set the password Length

Minimum password length: 8
Maximum password length: 100

    ./password_gen.sh -l20   #Sets password length to 20 characters.  
    ./password_gen.sh -l50   #Sets password length to 50 characters.

Use the optional -s flag to modify the Style

    ./password_gen.sh     (Default.  Letters A-za-z numbers 0-9 No symbols)
    ./password_gen.sh -sS (Symbols subset!@+*=#$%&, Letters and Numbers).
    ./password_gen.sh -sH (Hyphens every 4 characters, Letters and Numbers)
    ./password_gen.sh -sL (Letters only)
    ./password_gen.sh -sU (UPPERCASE LETTERS ONLY)
    ./password_gen.sh -sC (Comprehensive:  all printable ASCII characters)

Any style that includes symbols will begin and end with a letter.

White space doesn't matter. These are equivalent:

    "./password_gen.sh -s H"  ==  "./password_gen.sh -sH"

Combine Flags

Use both the -l flag and the -s flag to tailor your password.
Create password of length 40 with Style S:

    ./password_gen.sh -l40 -sS

Create password of length 30 with hyphens

    ./password_gen.sh -l30 -sH

Create password of length 50 using UPPERCASE LETTERS ONLY:

    ./password_gen.sh -l50 -sU

Installation:

  • Copy the password_gen.sh script to your machine.
  • Chmod u+x the script so that it is executable.
  • Store the script in a directory on your path so you can use it from anywhere.

Clipboard and Terminal Cleanup

Be sure to clear your clipboard and terminal buffers after generating passwords.

Changelog

2024-04-14:

  • Deprecated cleanup of clipboard and terminal. Now focuses on password generation.
  • Changed S and C styles to use first/last letter restriction.
  • Loop to generate and print 5 passwords.
  • Print password within added quotation marks.
  • Added AUTO mode for automated operation.

2023-11-22: Adopted auto-clipboard functionality and cleanup.
2023-10-27:

  • Updated README.
  • Documented script.
  • Added COMPREHENSIVE style to script.

2023-09-15: Tweaked README. Still learning markup formatting rules...
2023-06-30:Changed H flag to K. Tweaked notes throughout.
2023-06-10:added -h help flag, and updated this readme.
2022-08-16:Using 'random" instead of "urandom"
2022-08-06 all files adding signature to commit