Linux: This Book Includes 4 Manuscripts. The Underground Bible to the unix operating System with Tools On Security and Kali Hacking to Understand Computer Programming, Data Science and Command Line

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Linux This Book Includes 4 Manuscripts The Underground Bible

6) Delete a group
Like the user system, it is also productive to delete the user groups if there
is no use of it anymore. Hackers too evidently use this command to wipe
out a set of user groups that they find easy to be get traced.
Below is the command to delete a user group:
linuxexample @ host : groupdel GID 3453
Remember that every directory and information that is present and related
to every user will be wiped off. There are very fewer chances of getting the
data back unless one uses professional backup and recovery tools.
7) View the User's
There is a special command in Linux called uses that can be used to check
all the users that are present in the system no matter if they are alive or not
at the moment.
Here is the command with an output for the user's command
linuxexample @ host : view UI D
Output:
2443 sample1
8942 example

0987 admin
-----
-----
-----
----
4673 systemuser
8) Finger Command
Finger command is used differently and is used to find the awake user or
group systems at the present moment. This can be highly beneficial when
performing complex system tasks.
Below is the command for the finger functionality with an output:
linuxexample @ host : finger UID
Output:
2443 sample1
8942 exampl e
9) Cron Command
Linux system runs on services. Services are basic tasks that can be used by
operating systems to perform their desired tasks. Cron command is a special
set of commands that can be used to automate tasks like starting an
antivirus automatically when you boot up the system or switching into a
VPN profile when accessing a particular software.
Below we explain with an example about cron command in detail:
service crond start
This starts the cron service and lets us run things.
Service crond status
With this command, you can easily check what is going on.

All of these tasks will be stored in the /etc/crontab directory.
By this, we have explained a detailed explanation about the Linux user
management system and in the next section, we will in detail explain about
file management system which is one of the most pioneer branches that a
hacker should be perfect at. Let us go!

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