Learn Linux Shell Scripting - Fundamentals of Bash 4.4

Generating a password

Now, you might be wondering what use random characters might have. A prime example is generating passwords. Long, random passwords are always good; they're resistant to brute-force attacks, cannot be guessed, and, if not reused, are very secure. And let's be honest, how cool is it to generate a random password using the entropy from your own Linux system?

Even better, we can use input redirection from /dev/urandom to accomplish this, together with the tr command. A simple script would look like this:

reader@ubuntu:~/scripts/chapter_12$ vim password-generator.sh reader@ubuntu:~/scripts/chapter_12$ cat password-generator.sh #!/bin/bash###################################### Author: Sebastiaan Tammer# Version: v1.0.0# Date: ...