How to use mkdir, tar and kill commands efficiently in Linux

To use mkdir, tar and kill commands efficiently in Linux

In this tutorial how to use mkdir, tar and kill commands efficiently in Linux command efficiently is illustrated with examples.

Using mkdir create directory tree

[root@linuxhelp Desktop]# mkdir folder
[root@linuxhelp Desktop]# cd folder
[root@linuxhelp folder]# mkdir image
[root@linuxhelp folder]# cd image/
[root@linuxhelp image]# mkdir video
[root@linuxhelp image]# cd video
[root@linuxhelp Desktop]# tree folder
folder
??? image
    ??? video
2 directories, 0 files

The above method is very long process to create the directory tree.

Create the directory tree efficiently

mkdir with option -p will create the long directory tree in single command.

[root@linuxhelp Desktop]# mkdir -p mydir/dir/a1/b2/c3
[root@linuxhelp Desktop]# tree mydir
mydir
??? dir
    ??? a1
        ??? b2
            ??? c3

4 directories, 0 files

To create and view the files

To create the file use touch command.

[root@linuxhelp Desktop]# touch my.txt

Once the text file is created, add the contents by using editor like vim ,vi ,nano&hellip etc.

[root@linuxhelp Desktop]# vim my.txt
Centos
Redhat
Ubuntu

Now the next step if you want to view your created file by using same editors use the following command.

[root@linuxhelp Desktop]# vim my.txt

So this method also takes some time to create the file and add the contents to that file.

To create the file using cat command

Using cat command it will simple to create the file and also easy view the created file.

[root@linuxhelp Desktop]# cat < <  EOF >  file.txt
linux
window

To view the content of created files

[root@linuxhelp Desktop]# cat file.txt
linux
window

We often deal with archives on Linux and in several cases we use TAR ball on some location other than the downloads folder.
In such a situation we normally do the following method

First we start copy or move the tar ball and extract it at the destination.

[root@linuxhelp Desktop]# cp folder.tar /root/Documents/
[root@linuxhelp Desktop]# cd  ../Documents
[root@linuxhelp Documents]# ls
folder.tar
[root@linuxhelp Documents]# tar -xvf folder.tar
folder/
folder/image/
folder/image/video/

So these method will take little longer steps. The below command will overcome this issue.

[root@linuxhelp Desktop]# tar -xvf mydir.tar.gz -C /root/Downloads
mydir/
mydir/music/
mydir/music/s2/
mydir/music/s1/
mydir/dir/
.
.
.
mydir/{number/
mydir/{number/a1/
mydir/{number/a1/b1}/

Option C is used to mention the destination path

[root@linuxhelp Desktop]# cd ../Downloads/
[root@linuxhelp Downloads]# ls
mydir

To kill the process and view the status

Usually we first list all the process using ps -A and pipeline it with grep to find a process or a service:

[root@linuxhelp Desktop]# ps -A | grep -i python
 3059 ?        00:00:01 python

Now let us kill the above process id.

[root@linuxhelp Desktop]#kill 3059
[root@linuxhelp Desktop]# ps -A | grep -i python

To view the process details and delete the process

To view the process details and delete the process by using pgrep and pkill commands.
You may find relevant information about a process just by using pgrep. To kill a process, just type pkill followed by the process to kill.

[root@linuxhelp Desktop]# ps -A | grep -i gnote
 3032 ?        00:00:01 gnote
[root@linuxhelp Desktop]# pgrep gnote
3032
[root@linuxhelp Desktop]# pgrep -l gnote
3032 gnote
[root@linuxhelp Desktop]# pkill gnote
[root@linuxhelp Desktop]# pgrep -l gnote