Whatis command in Linux

whatis command in Linux is used to get a one-line manual page descriptions. In Linux, each manual page has some sort of description within it. So this command search for the manual pages names and show the manual page description of the specified filename or argument.

What is the use of whatis?
What is the function of command in Linux?
How do I use whats command?
What is a process in Linux?
Why do we use Linux?
How do I use Linux commands?
What can I do in Linux?
What is the whatis command?
What command means?
What are the 5 basic components of Linux?
How do I see processes in Linux?
How do I start a process in Linux?

What is the use of whatis?

Whatis provides several command line options to help user in getting brief information of specific Linux commands as per their need or interest. For example, here is the output of whatis command, when it is run without any option. It displays brief information about “write” from man pages.

What is the function of command in Linux?

Function is a command in linux which is used to create functions or methods. using function keyword : A function in linux can be decalred by using keyword function before the name of the function. Different satements can be separated by a semicolon or a new line.

How do I use whats command?

To access the information of a Linux command from a specific section of the manual page, execute the command with the "-s or --section" option. It will bound the whatis command to display the short description from the specified section of the manual page only. Consider the below command: whatis -s "1","2" cat.

What is a process in Linux?

An instance of a running program is called a process. Every time you run a shell command, a program is run and a process is created for it. ... Linux is a multitasking operating system, which means that multiple programs can be running at the same time (processes are also known as tasks).

Why do we use Linux?

In Linux, UNIX and related operating systems, . denotes the current directory. Since you want to run a file in your current directory and that directory is not in your $PATH , you need the ./ bit to tell the shell where the executable is. So, ./foo means run the executable called foo that is in this directory.

How do I use Linux commands?

Linux Commands

pwd — When you first open the terminal, you are in the home directory of your user. ...
ls — Use the "ls" command to know what files are in the directory you are in. ...
cd — Use the "cd" command to go to a directory. ...
mkdir & rmdir — Use the mkdir command when you need to create a folder or a directory.

What can I do in Linux?

You can do everything including, creating and removing file and directory, browsing the web, sending mail, setting up network connection, format partition, monitoring system performance using the command-line terminal. Compare to other operating systems, Linux gives you a feeling that it is your system and you own it.

What is the whatis command?

What command means?

1 : an order given Obey her command. 2 : the authority, right, or power to command : control The troops are under my command. 3 : the ability to control and use : mastery She has a good command of the language.

What are the 5 basic components of Linux?

Components of Linux System

Kernel − Kernel is the core part of Linux. ...
System Library − System libraries are special functions or programs using which application programs or system utilities accesses Kernel's features. ...
System Utility − System Utility programs are responsible to do specialized, individual level tasks.

How do I see processes in Linux?

Check running process in Linux

Open the terminal window on Linux.
For remote Linux server use the ssh command for log in purpose.
Type the ps aux command to see all running process in Linux.
Alternatively, you can issue the top command or htop command to view running process in Linux.

How do I start a process in Linux?

Starting a process

The easiest way to start a process is to type its name at the command line and press Enter.