It is open-source, free to use, and works on many systems. pwgen is more than a random password generator however, it is a professional password generating tool that can create classical cryptographically-secure passwords, pattern-based passwords, list-based passwords, and more, all using the random pool technique to generate random data. While /dev/urandom can be used anywhere and comes built-in, you can also use pwgen to generate a random password. Head /dev/urandom | tr -dc A-Za-z0-9 | head -c 10 Using pwgen To get a password that is longer than eight characters, simply change the value of -c 8 in the above command to your desired length, for example the following for a ten-character long password: The final pipe again uses head to cut the output into eight characters. We used the options -dc to delete and use the complement of the given set with A-Za-z0-9 to get uppercase, lowercase, and numerical characters. This command translates the input string into a new one based on the options given to it. The above command, broken down, uses the head to get the first few lines of the dev/urandom file, then pipes the output to the command tr. Head /dev/urandom | tr -dc A-Za-z0-9 | head -c 8 We can use /dev/urandom to generate a password that is eight characters long and is made up of random uppercase and lowercase letters and numbers (you may need to use sudo): Note that this is different than the popular /dev/random that you likely know already, which is a true random number generator unlike the pseudo-randomness of /dev/urandom. The below command uses /dev/urandom, which is a special file that uses the internal random number generator to produce pseudo-random bits. We start off simple with a method that can be used on any Linux/Unix system in order to generate a random string. 1 Server ( Cloud Server or Dedicated Server) running Linux.In order to complete this tutorial, you need the following: This guide will show how you can generate a random password for yourself on any Linux/Unix system.
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