The pwgen program generates passwords which are designed to be easily memorized by humans, while being as secure as possible. Human-memorable passwords are never going to be as secure as completely completely random passwords.
This tutorial explains how to install pwgen on Raspberry Pi.
Use SSH to connect to Raspberry Pi. Update the package lists and install pwgen by using the following commands:
sudo apt update sudo apt install -y pwgen
Now simply type the pwgen command:
By default, pwgen generates 160 passwords which are 8 characters in length.
Run pwgen -c followed by the character length to generate a password with at least one capital letter:
user@raspberrypi:~ $ pwgen -c 5 4 ko0Ku Ain4e Thoa3 GeiF8
- -0, –no-numerals
- Don’t include numbers in the generated passwords.
- Print the generated passwords one per line.
- -A, –no-capitalize
- Don’t bother to include any capital letters in the generated passwords.
- -a, –alt-phonics
- This option doesn’t do anything special; it is present only for backwards compatibility.
- -B, –ambiguous
- Don’t use characters that could be confused by the user when printed, such as ‘l’ and ‘1’, or ‘0’ or ‘O’. This reduces the number of possible passwords significantly, and as such reduces the quality of the passwords. It may be useful for users who have bad vision, but in general use of this option is not recommended.
- -c, –capitalize
- Include at least one capital letter in the password. This is the default if the standard output is a tty device.
- Print the generated passwords in columns. This is the default if the standard output is a tty device.
- -N, –num-passwords=num
- Generate num passwords. This defaults to a screenful if passwords are printed by columns, and one password.
- -n, –numerals
- Include at least one number in the password. This is the default if the standard output is a tty device.
- -H, –sha1=/path/to/file[#seed]
- Will use the sha1’s hash of given file and the optional seed to create password. It will allow you to compute the same password later, if you remember the file, seed, and pwgen’s options used. ie: pwgen -H ~/firstname.lastname@example.org gives a list of possibles passwords for your pop3 account, and you can ask this list again and again.
- The passwords generated using this option are not very random. If you use this option, make sure the attacker can not obtain a copy of the file. Also, note that the name of the file may be easily available from the ~/.history or ~/.bash_history file.
- -h, –help
- Print a help message.
- -s, –secure
- Generate completely random, hard-to-memorize passwords. These should only be used for machine passwords, since otherwise it’s almost guaranteed that users will simply write the password on a piece of paper taped to the monitor…
- -v, –no-vowels
- Generate random passwords that do not contain vowels or numbers that might be mistaken for vowels. It provides less secure passwords to allow system administrators to not have to worry with random passwords accidentally contain offensive substrings.
- -y, –symbols
- Include at least one special character in the password.