The command in Unix is actually the mean of communication while working through the terminal. It is comprised of numerous commands that facilitate users’ interaction with the hardware. Unix is an operating system popular for its command-line interface. The keywords or arguments have to be followed by - while writing in the command line. In the below image, we will see all the arguments that could be used with the chmod command. In order to check which arguments are there for any specific command, you can use –help the argument. For instance, the ls command can be used to check which file and directories are available at your current location, but it could be used as -an argument to uncover all the hidden files at the same location.Įvery command has some of the argument allocated to it that could be used with those particular commands.
Though the commands are very few in the count, they could be used with several arguments to perform some of the complex tasks. We have to use the Sudo command to make it work. Here we will be executing a command that could lead to making some changes in the system, and hence it couldn’t be executed with other users. There are some commands that the only root is authorized to execute. We will use the chmod command to give all permission to everyone. The file has read and run permission to the owner, read permission to the group and read permission to others. The chmod command is used when we have to change the permission of any file. The user name can be seen in the red text on the left side of the dollar mark. In the below picture, we will be able to see that the current user is Vishal, and after we used the su command to login as root, the user name will be changed. Su command is used when we need to switch the user. Please note that if you try to move the file in the same folder, it will rename it, and if you try to move it to another directory, it will get moved there. Here we will rename the page.html file to newpage.html. The mv command can be used for two purposes, for renaming and for moving file or folder. In the second line, it shows test.css present there, but after running the rm command, that file has been removed. In our case, we are at Desktop that has the test.css file Now, we will try to delete that file using the rm command. The rm command is used to delete the files at your current location. Here we will add extra data in the test.css file. Regardless of the size and type of the file, we can edit those using the Vi command if they have text written on it. Vi command is the most useful command that is used to fetch the data written on any file on the terminal and also let us make the changes at the same time.
We will see what is written on that file using the cat command. We have seen that in the desktop location, we have a file names test.css. It could also be used to append the data in the file and can overwrite on it.
In the below image, you can see that in the second line, the newdir is present, but after we executed the rmdir command, it has deleted the newdir folder.Ĭat command is used to read the data written on any file. This command will be used to remove the directory. The directory could be witnesses in blue color. In the below image, we are at the Desktop and using the mkdir command to create a directory named “newdir” there. This Unix command is used to make a new directory at your current location. Ubuntu operating system is a version of Unix which lets us do all the work that Unix is supposed to do. In simple terms, it’s also a multiuser operating system. Unix is a multitasking operating system that also provides an opportunity for multiple users to utilize its feature. It is developed in the C language by Dennis Ritchie. Unix is as an operating system that offers both GUI and CLI-based interaction. which can be used to perform complex tasks. An operating system offering both Graphical User Interface (GUI) and Command Line Interface (CLI) based interaction developed by Dennis Ritchie, Ken Thompson, Brian Kernighan, Joe Ossanna and Douglas Mcllroy at Bell laboratory in the year 1970 known as a multi-tasking operating system allowing multiple users to work on the operating system simultaneously and provides commands for the users to interact with the application through Command Line Interface (CLI) like ls command, clear command, mkdir command, rmdir command, cat command, vi commands, rm command, mv command, su command, chmod command, sudo command etc. The following article provides an outline for Unix Commands.
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