Basic Commands - 2.1

To View the calender

Example : To see the current month

[root@localhost ~] # cal

     August 2011  
Su Mo Tu We Th Fr Sa
    1  2  3  4  5  6
 7  8  9 10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29 30 31

Example : -   TO see the past, current and next month

[root@localhost ~] # cal -3
 
     July 2011            August 2011         September 2011 
Su Mo Tu We Th Fr Sa  Su Mo Tu We Th Fr Sa  Su Mo Tu We Th Fr Sa
                1  2      1  2  3  4  5  6               1  2  3
 3  4  5  6  7  8  9   7  8  9 10 11 12 13   4  5  6  7  8  9 10
10 11 12 13 14 15 16  14 15 16 17 18 19 20  11 12 13 14 15 16 17
17 18 19 20 21 22 23  21 22 23 24 25 26 27  18 19 20 21 22 23 24
24 25 26 27 28 29 30  28 29 30 31           25 26 27 28 29 30 
31                                                             

Example :- To see the calender of the current year

[root@localhost ~] # cal -y

Example: To see the calender for the month of December for the year 2010

[root@localhost ~] # cal 12 2010

Example: To see the calender for the full year 2009

[root@localhost ~] # cal 2009

To View help for a command (manual Pages)


Syntax :-


[root@localhost ~] # man <command>


To See the help for the command mkdir

[root@localhost ~] # man mkdir

To View the top 10 lines of a file

Example :- 

[root@localhost ~] # head anaconda-ks.cfg

To View the top 5 lines of a file

Example :-


[root@localhost ~] # head -5 anaconda-ks.cfg

To view the bottom 10 lines of a file

Example :-

[root@localhost ~] # tail anaconda-ks.cfg

To view the bottom 3 lines of a file

Example :-

[root@localhost ~] # tail -3 anaconda-ks.cfg