basic linux commands ubuntu

What are commands in Ubuntu?
Commands are given by specifying the name of a program and there are many standard Linux tools installed by default in Ubuntu 20.04. Some tools are for navigating the file system, others are for installing software packages, and others are used to configure the system and applications.
Does Linux have a manual?
All Linux systems come with a manual for the commands. It’s called manpage, and you can access the manual page of an installed command with the following: Understanding the manpage can be overwhelming for new users, but it comes quite handy. It gives you the generic syntax and description of a command's options.

LS Command: List The Contents of A Folder

This is among the first few commands a new Linux user learns. This command lets you see what files and folders are in your current folder. You can use the long listing option ls -l to see details like file size, permission, modified time, etc. You can sort and control these options if you want to. Related Read: ls command examples itsfoss.com

CD Command: Change The Directory

By default, you start in your home directory. You’ll often require to change the directoryand move to another one. For example, you downloaded a deb file or script. Now you want to run it. You can do that from your present working directory by providing the full path but switching to that location makes things easier. The cd command stands for chan

Cat Command: Read A Text File

If you quickly want to see the contents of a text file in Linux, catis the command you use. It displays the contents on the screen. You can also use the cat command to create new files or add more text to existing files. Recommended Read: cat command examples itsfoss.com

Less Command: Read A Large Text File

The cat command is good enough for viewing small text files. But I won’t recommend using cat if you have a huge text file with hundreds of lines. It will flood your screen with all the text, and you will have difficulty with it. This is where the less command comes into the picture. When you open a file with less, it opens the file in pages. You ca

Touch Command: Create New Files

There are multiple ways of creating new files in the Linux terminal. The cat command you saw above can also create new files. However, I prefer the touch command for this purpose. If you use it with existing files, their timestamps will be modified. Also Read: touch command examples itsfoss.com

mkdir Command: Make New Folders

While there is no specific command for creating new files, there is a dedicated command for making new folders (or directories, as we call them in Linux). Explore More Here: mkdir command examples itsfoss.com

CP Command: Copy Files and Folders

Copying files and folders in the command line is also one of the common tasks you will encounter. The cp command, short for copy, is used for this purpose. Imagine that you have to modify a configuration file. A smart move will be to copy the file with another name. This way, you’ll have a backup of the file. You can use the same cp command for cop

MV Command: Cut-Paste Or Rename Files and Folders

The mv command stands for ‘move’. When you copy a file to another location, it remains in its original place. The mv command moves the files and folders to the other location. You can think of it as a cut-paste operation. You can use the mv command to rename the file as well. The same mv command also moves or renames folders without any special opt

RM Command: Remove Files and Folders

You use the rm (short for remove) command to delete files in the Linux terminal. There is no undo option after you delete files in the command line. This is why you should be extremely careful while deleting files. If you are afraid of deleting the wrong file, use the interactive mode with option -i, which gives you an additional prompt to confirm

Nano: Edit Files

Sooner or later, you’ll be required to make changes to the contents of a file. Imagine that you have to change a configuration file of SSH, grub, or some other application. There are command line-based text editors for this purpose. Ubuntu comes with Nano editor preinstalled, and it is relatively easier to use than Vim, Emacs, etc. If you are curio

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