The standard Linux permissions are suitable for most situations but they have their own limitations. The standard permissions limit access to file owner, group owner and others. But, what-if we want to grant specific permission to another named user, other than the user-owner or another named group other than the group-owner. Access Control List (ACL) […]
As a user if you want to schedule certain activities which should repeat themselves on their own at some time in the future i.e., you want to schedule recurring tasks then use the crontab command. In this post we will learn scheduling recurring tasks using crontab command There are different ways to use the crontab […]
At times we forget the root user password that we have set on our Linux machine. In this post, we will learn how to recover a lost root password in Linux. The procedure is most suitable of RedHat, Fedora and CentOS operating systems. Follow the below mentioned procedure: Step 1: Reboot the machine and stop […]
Loops(for, while, until) in shell scripting are used to perform an operation multiple time. A loop is a portion of code that repeats (iterates) a set of commands till the loop control condition is true. For Loop in Shell Scripting The for loop in shell script has two syntax: Syntax 1: for variable in values […]
At times, we require to transfer contents to or from the pendrive from WSL(Windows Subsystem for Linux). So, in this tutorial we will learn How to Access Pen-drive in Windows Sub-System for Linux To access Pen-drive in Windows Sub-System for Linux, we have to mount the pendrive. So, follow the below mentioned steps: Step1: Plugin […]
Variables are nothing but a placeholder for storing some value or data. Referencing the value of the variable is called variable referencing. Next, we will learn about using variables in shell scripting. How to assign value to a variable? The synatx for using a variable in shell scripting is simple variable_name=value Remember: Never give space […]
A Shell script is a nothing but a sequence of commands written to achieve a specific task. For example: echo “script to create a file”touch File1echo “File created” What is the need of Shell Script? A script helps to automate tasks. For instance, if you are required to execute 20 commands every day, you will […]
The topic of this post may seem trivial, but many students do not understand the difference between read, write and execute permissions for file and directory. For example, what is the point of assigning execute permission to directory? It’s never going to run. So, in this discussion we are going to clarify all such doubts. […]
The output of a process can be either redirected to a file or to another process i.e., the output of a command will not appear on the screen but will be saved in a file or it can act as an input of another command. The redirection operators like >, >>, &>, 2> etc are […]
Links in Linux are like Short-cuts in Windows. We create a shortcut for a file/folder in Windows so that the original file can be accessed from multiple locations. The same concept goes for links. Links help to access the file from multiple directories. Before we learn how to create links using ln command in Linux, […]