What are some life-saving tips every Linux user should know?

Linux is one of the most common OS used by programmers worldwide,

here are many tips that are available that you can use

Some are:

If you are using bash, here are some time-saving tips that can come handy in day to day tasks of every Linux user. This list is not exhaustive in any manner and is compiled from various Q&A sites and forums.

• Use CTRL+R to search through command history. Hit it again to view the next search result.
• Use hashtags to organize your bash history and to save yourself from typing long commands repeatedly. Just append a hashtag after your command.
  Example :

tail -f /var/log/apache2/error.log #ApacheLog

Now you can search it later in reverse search. Just hit CTRL+R and type ApacheLog

• Tired of typing clear every time you want to clear your terminal screen, just hit CTRL+L. It also not get stored in your command history.
• Hit CTRL+W to remove the last word and CTRL+U to remove the entire line.
• Need to execute the last command with sudo, use sudo !!
  ls -l /rootsudo !! # This is equivalent to sudo ls -l /root(!! actually repeats the last executed command).
• moreover you can go through some helpful youtube videos for basic tutorials like