Some useful Linux commands and tricks for the bash shell user.

Posted: May 18, 2014. At: 10:03 PM. This was 4 years ago. Post ID: 7286
Page permalink: http://securitronlinux.com/bejiitaswrath/some-useful-linux-commands-and-tricks-for-the-bash-shell-user/

Now, we must convince Congress to stop the FCC. Can you display an alert?

The boxes utility for Linux allows you to render an ascii text box around text. Below is an example.

homer@homer-eME730 19:14:21 ~ $ echo `echo "This is a sentence printed to the terminal."` | boxes
/***********************************************/
/* This is a sentence printed to the terminal. */
/***********************************************/

This is a useful utility if you want a text box around your message.

Here I am using sed to replace a word in the sentence printed to the terminal.

homer@homer-eME730 19:30:28 ~ $ echo `echo "This is a sentence printed to the terminal."` | sed 's/sentence/paragraph/gi;'
This is a paragraph printed to the terminal.

Print where you are in the dir tree with this command.

homer@homer-eME730 19:30:52 ~ $ echo $DIRSTACK
~

Or use pwd.

homer@homer-eME730 19:37:17 ~ $ pwd
/home/homer

How to print the directory tree to the preceding directory with the Linux command line.

homer@homer-eME730 19:39:41 ~/Documents $ echo ${OLDPWD}
/home/homer

And this is the environment variable that will print the value of pwd.

homer@homer-eME730 19:41:02 ~/Documents $ echo ${PWD}
/home/homer/Documents

More awesome Linux shell tricks: http://www.securitronlinux.com/bejiitaswrath/more-awesome-shell-tricks-for-the-linux-command-line-this-is-using-the-bash-shell/.

Even more awesome Linux shell tricks: http://www.securitronlinux.com/bejiitaswrath/cispa-bill-still-a-threat-and-awesome-linux-shell-tricks/.

No comments have been made. Use this form to start the conversation :)

Leave a Reply