The use of DevOps concepts may assist teams in delivering higher-quality software more quickly, while also fulfilling customer expectations for rapid access and 24-hour availability. DevOps is rapidly becoming the industry standard for software development as a consequence.
This blog will cover the Important Linux Commands for devops in depth, but before that let us also understand devops, linux , why is linux used for devops and why it is so popular.
Infrastructure automation is one of the primary procedures that the vast majority of information technology organisations engage in. Linux is a very popular choice for usage in the field of infrastructure automation. Linux makes the process of creating instances and running processes far more efficient, so both of these benefits go to the user.
Benefits of using Linux
The curl command is an extremely useful piece of software that may be used to get data from URLs or online repositories.
The id command is used in Linux to get user names, group names, and numerical IDs (UID or group ID) for the currently logged-in user as well as any other users that are using the server. This includes both the user ID and the group ID.
This is one of the strongest Linux networking commands often used to determine which process is listening on a certain port; however, do you know how to print the process id of a listening process? This is when netstat -p comes in handy. It outputs the process id and programme name associated with each socket. This is helpful since you may now terminate the procedure if you so want.
While working on a Linux/Unix system, many files and folders may be in use, with some being visible and others not. List Of Open File is the meaning of lsof. This command offers a list of all opened files. It provides the information necessary to determine which process opened particular files. On a single operation, all open files are listed in the output console.
The ifconfig command, which stands for "interface configuration," is what's used to configure the network interfaces that are resident in the kernel. At the moment of booting, it is utilised to set up the interfaces in the appropriate manner. After then, you will often only utilise it when necessary during the debugging process or when you need to tune the system. Additionally, you may use this command to activate or disable a particular interface, as well as provide an IP address and netmask to an interface.
Sed is a text editor that allows editing operations to be carried out in a manner that is not interactive. For the purpose of carrying out an editing action on a file, the sed command obtains its input either from the standard input or a file. It is possible to do a large number of file modifications with the help of sed, which is a highly powerful application. I will discuss the significant operation that you would wish to do with a text file in the following paragraphs.
If you want to alter some text in a file by searching for it in the file, you may use the sed command with the substitution "s" option to search for the specified pattern and change it. This is useful if you want to replace some text in a file by looking for it in the file.
The history command is used to see the command that was run before this one. In the Bourne shell, this functionality was not accessible at any time. Both Bash and Korn have support for this feature, which states that each command that is carried out is considered to be an event and is given an event number. Using this number, the commands may be retrieved and altered as necessary. These commands are recorded in a history file for future reference. The history command in the Bash shell displays the whole list of commands.
What exactly is Shell?
The Kernel and the Shell are the two most important parts of an operating system.
A Kernel may be compared to the centre of a computer. It facilitates communication between hardware and software. The Kernel is the most fundamental component of an operating system, whereas the shell is the most superficial.
A shell in the Linux operating system accepts user input in the form of commands, processes it, and then produces output. It serves as the user's interface for working with programmes, commands, and scripts. A terminal provides access to the shell and executes commands.
When the terminal is started, the Shell displays a command prompt (often $) where you may enter your input; the terminal then executes it when you press the Enter key. The terminal will then print the results of your instructions.
The Shell serves as a protective shell for an Operating system's fragile inside, preventing inadvertent harm. This is why the name is Shell.
What is the Shell Scripting ?
Shell scripting involves creating a set of executable commands for the shell. It may integrate complex and repeated command sequences into a single, simple script. This script may be saved and executed anytime desired. This drastically minimises the amount of work needed by the end-user.
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