First, we have to understand what is the Fibonacci sequence, which forms a sequence, such that each number is the sum of the two preceding ones, starting from 0 and 1.

The Carriage Return character is \r (0x0D), the CR character moves the cursor to the beginning of the line without advancing to the next line.

In this post how to replace and remove one or more lines in a file using sed command with example.

If you may get an error when you install packages in your system like, Ubuntu, CentOS, Fedora, Debian and so on.

Sometimes it is useful to change the current shell for any users. chsh command can help you to manage your login shell.

You may get an error when starting ssh on terminal, touch: cannot touch `'/var/lock/subsys/sshd': No space left on device