Tips & Tricks

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Some Cool Linux Tricks for The Beginners

Linux is a Operating system that is increasing its users by its benefits.
but to become expert it is necessary to learn all the basic and needy Tricks/Commands for linux. So, I will write some Tricks 

1.How to Empty a file using ‘>’ operator ?
                                  Suppose you want to empty a file from command line.
Here is how easily you can do it :

   $ > [complete file path]
For example :

   $ > ./logfile

This will delete all the contents of the file ‘logfile’ and empty it.


2.How to search man pages for a particular string?

You might have used Linux man pages to understand more about a command, function etc. But, what if you want to know which man pages discuss about a particular topic. For example, what if I want to know that which man pages discuss about ‘login’?

Well, there exists an option -k through which you can do this. Here is an example :
$ man -k login
 access.conf (5)                      - the login access control table file 
add-shell (8)                           - add shells to the list of valid login shells 
chsh (1)                                 - change login shell
 faillog (5)                               - login failure logging file 
faillog (8)                              - display faillog records or set login failure limits 
getlogin (3)                            - get username 
getlogin_r (3)                       - get username 
gnome-session-properties (1)             - Configure applications to start on login 
hotot (7)                              - lightweight & opensource microbloging client
issue (5)                               - prelogin message and identification file
lastlog (8)                              - reports the most recent login of all users or of a given user
 login (1)                                  - begin session on the system
login (3)                                - write utmp and wtmp entries
login.defs (5)                            - shadow password suite configuration
login_tty (3)                             - tty utility functions
logname (1)                              - print user's login name


So we see that all the man pages that discuss about ‘login’ were displayed in the output.

3.How to simulate on-screen typing just like you see in movies?

Well, to simulate typing just like you see in movies, use ‘pv’ command.

Try this out : echo "You can simulate on-screen typing just like in the movies" | pv -qL 10

Check the output for yourself.

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