Linux series Part-3


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##You should be careful with the spaces between the commands. If not, it just throws you an error.

In this article, you will learn about handy commands like whatis and apropos. Some commands every Linux user must know are explained in a friendly manner. We had given the file names and directory names also as you don’t need to think of new names. Try those commands, you will get an idea of executing commands.

Before reading this article, refer to our previous posts. — Linux series part-1 — Linux series part-2

let’s go…

whatis command: It displays one-line manual page descriptions. See the picture below. Try out for other commands.

apropos command: If you don’t know the command to start with and which man page to read, the co31mmand apropos is available to give you the related commands which are matched with the command you entered. See the picture below.

Some commands you should be thorough:

Try these commands in your Linux Command Line Interface (CLI) with available options to attain some knowledge about the usage of commands. Whatever the command, Learn from the man, help, info pages, etc. about that command.

These commands are useful when you are executing file management, User management, Filtering, and Programming with Linux, File security, Networking, etc. Not only managing but also every user should know these commands.

## Some examples are explained in this blog.

ls: Listing directory contents with sorting.

pwd: prints the current working directory.

cd: Changing directory.

man: Display manual pages about a particular command.

mkdir: Create directories, can create multiple directories at a time, and can create nested folders.

Ex. mkdir dev1 #Creating directory

mkdir dev2 dev3 dev4 #Creating multiple directories

mkdir -p dev/{u1/{v1,w1} u2/{v2} u3} #Creating nested directories

rmdir: Remove empty directories and can remove the multiple directories at a time.

Ex. rmdir dev1 #Removing empty directory

mv: Moving the files from the current path to a new path

Ex. mv current_directory new_directory #Moving files

cp: To copy a file. Use -r option, if to copy the directory contents.

Ex. cp f1 f3 #Copying files

cp f1 /D1 #Copying file to directory

cp -r /D1 D2 # Copying directories

rm: To remove a file

Ex. rm f3 # Removing file

rm -r dev # Removing directory

file: Determines the file type whether ASCII text, bash script, etc.

Ex. file f3 # Tells you the type of file.

touch: Creates an empty file

Ex. touch f2 # Creates an empty file named f2

clear: Clears the terminal.

Ex. clear

nano: It is an editor without modes so that beginners can type characters directly, the file can be edited.

Ex. nano file_name #opens nano editor to write

vim: The file can be edited using this editor especially by programmers.

Ex. vim file_name #opens vim editor to write

emacs: The file can be edited using this editor and it is regarded as an awesome editor in Unix systems.

Ex. emacs file_name #opens emacs editor to write

Tip: If you don’t know the appropriate usage of the command, do apropos or whatis. These commands will tell you about the given command.

Next week, you will learn some more commands. stay connected ❤