In Today’s world of IT , Linux has come as the master of all operating system , so powerful , so natural , so skillful , so many commands and for this a administrator who wants to be a knowledgeable and skillful should have a basic hand in all different linux operating systems. Today , I am going to tell you some basic commands that can add some more knowledge to your database. These commands are sorted from A TO Z as follows.
A way to run a command or a series of Unix commands using a shorter name than those that are usually associated with such commands.
A portable, fast, open source program used to compress and decompress files at a high rate.
A Unix/Linux command that can read, modify or concatenate text files. Cat commands are most commonly used for displaying the contents of a file.
The cd command changes the current directory in Linux and can toggle between directories conveniently. Cd is similar to the CD and CHDIR commands in MS-DOS.
Chmod changes the access mode (permissions) of one or more files. Only the owner of a file or a privileged user may change the access mode.
Df displays the amount of disk space available on the file system containing each file name argument. With no file name, available space on all currently mounted file systems is shown.
Date sets a system’s date and time. This is also a useful way to output/print current information when working in a script file.
Echo allows a user to repeat, or “echo,” a string variable to standard output.
Find searches the directory tree to find particular groups of files that meet specified conditions, including –name and –type, -exec and –size and –mtime and –user.
Free displays the total amount of free and used physical memory and swap space in the system, as well as the buffers and cache used by the kernel.
Ifconfig is used to configure the kernel-resident network interfaces. It is used at boot time to set up interfaces. After that, it is usually only needed when debugging or when system tuning is needed.
The less command lets an admin scroll through configuration and error log files, displaying text files one screen at a time, with backward or forward moving available in files. There is more mobility within files.
Short for “manual,” man allows a user to format and display the user manual built into Linux distributions which documents commands and other aspects of the system.
Passwd updates a user’s authentication tokens (changes their current password).
The pwd (print working directory) command displays the name of the current working directory. This is a basic Linux command.
Red Hat Package Manager (RPM) is a command-line-driven program capable of installing, uninstalling and managing software packages in Linux.
Managing packages with RPM.
Sudo allows a system admin to give certain users the ability to run some (or all) commands at the root level and logs all commands and arguments.
The tar program provides the ability to create archives from a number of specified files or to extract files from such an archive.
Uname displays the name of the current operating system and can print information about the system.
Vi is a text editor that allows a user to control the system by solely using the keyboard instead of a combination of mouse selections and keystrokes.
Wget is a network utility that retrieves files from the web that support http, https and ftp protocols. Wget works non-interactively in the background while a user is logged off. This can create local versions of remote websites, re-creating directories of original sites.
So here they are all useful commands infront of you , a Linux administrator uses all these commands in his career. They cannot live by the GUI alone. That’s why I’ve compiled the most essential Linux commands into this blog. This is designed specifically for Linux managers and system administrators for only the most useful utilities. By learning how to use a few simple tools, command-line cowards can become scripting commandos, getting the most out of Linux by executing kernel and shell commands. Enjoy this blog and be sure to post your own Linux questions or browse Linux answers in our page.
- -Alin Parashar,RHCSA,RHCE,
Online trainer, GRRAS Solutions (P) Ltd., Jaipur