0 Basic Linux Commands

All commands in Linux are case sensitive , so the “ LS “command will be perceived differently by “ ls ”.Now we start with the basic commands that are commonly used in Linux :

ls
This command is a command to display the contents of a directory . This command is similar to the dir command in DOS .
There are several ways to use this command , for example :
 
# ls

# ls - l

To find out more about the ls command , please refer to the manual with the command man ls .

more
more commands can be used to view the contents of a text file to the screen by screen . more to get out of the view by pressing button ‘ q ‘.

cat
This command is used to display the contents of a file to the screen without a screen per-screen display facilities .

Usually used in conjunction with a pipeline or redirection . For example to display the contents of the file / etc / passwd and / etc / group , use the command :

# cat / etc/passwd/ etc/group

cd
This command is similar to the DOS cd command is used to move to a particular directory . Example commands :

# cd /home/whal

To go back to the /home directory , then use the command :

# cd ..

cp
This command is used to copy a file or directory . for example :

# cp whal whal2

The above command will copy the files whal to files whal2 . To copy the entire directory using the command :

# cp - R/home/whal  /home/gue

mv
This command is used to move a file to another location or with a different name . example :

# mv contoh1.php contoh2.php

# mv contoh1.php /home/whal/contoh2.php

rm
This command is used to delete directories or files . This command is similar to the DOS del command . In order to use this command carefully because there is no command in Linux undelete or unerase . Example of use rm as follows :

# rm contoh1.php

To delete a directory, use the command :

# rm /home/whal/temp

mkdir
This command is used to create directories . For example :

# mkdir whal

Pipeline
On Linux and UNIX , the output of a process program can be given as inputs to other processes . For example :

# ls - l /home/whal | more

grep
grep command is used to download the filter input and display in the form of lines corresponding to the pattern you want . example :

# ps ax |grep wvdial

redirection
In Linux or UNIX , you can turn swung standard input , standard output or error toward another goal .
For example, you can skew the standard output of a program to a file or standard input deflect a program from a file .

Distorting the process is called redirection and in UNIX  we used  ‘ > ’ symbols  ( to deflect the standard output to a file ) and the symbol ‘ < ’ ( to deflect from the standard input file ) . example :

To save the contents of the entire display directory /etc to a file , use the command :

# ls - lR /etc > content-etc

To add the contents of the file contents etc with other data , use the symbol >> ( append ) the redirection , for example :

# ls - lR /home/whal >> content-etc

To make the sorting order of data contained in the file contoh.txt can use the command :

# sort < contoh.txt

The above commands are commands that are often used in Linux or UNIX . If you still have trouble please read the manual first. Because it is very important to read the manual if you frequently “ oprek “ Linux or UNIX . from the manual book we can get the solution of the problems.