To see currently running
process
|
ps
|
$ps
|
List the process using most CPU
|
Top , htop
|
$top
|
To stop any process by PID i.e. to
kill process
|
kill {PID}
|
$kill 1012
|
To stop processes by name i.e. to
kill process
|
killall {Process-name}
pkill
xkill
|
$killall httpd
|
To get information about all
running process
|
ps -ag
|
$ps -ag
|
To stop all process except your
shell
|
kill 0
|
$kill 0
|
For background processing (With
&, use to put particular command and program in background)
|
linux-command &
|
$ls / -R | wc -l &
|
To display the owner of the
processes along with the processes
|
ps aux
|
$ps aux
|
To see if a particular process is
running or not. For this purpose you have to use ps command in combination
with the grep command
|
ps ax |
grep process-U-want-to see
|
For e.g. you want to see whether
Apache web server process is running or not then give command
$ ps ax
| grep httpd
|
To see currently running processes
and other information like memory and CPU usage with real time updates.
|
top
|
$top
Note that to exit from top command press q. |
To display a tree of processes
|
pstree
|
$pstree
|
Search Process id of a process
|
pgrep
|
$pgrep firefox
|
Changing Priority of a process
|
nice , renice
|
$renice 19 PID
|
Bash shell scripts in Linux are text files that contain a series of commands that can be executed by the Bash shell. Bash (Bourne Again Shell) is a popular shell in Linux and UNIX systems, and shell scripts are used to automate tasks, configure systems, or perform a sequence of operations. How to Write a Bash Shell Script Create a New File: You can create a new script using any text editor like nano , vim , or gedit . gedit myscript.sh Write the Script: A basic shell script begins with a "shebang" ( #!/bin/bash ) to specify the interpreter that will be used to execute the script. The rest of the file contains the commands to be run. Example of a simple script: #!/bin/bash # This is a comment echo "Hello, World!" # Print "Hello, World!" #!/bin/bash : Specifies that the script will be executed using the Bash shell. echo "Hello, World!" : A command that prints the string "Hello, World!" to the terminal. Comments: Any line starting ...
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