09 February

Access Control List (ACL)

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) […]

05 February

Scheduling recurring tasks using crontab command

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 […]

24 January

How to Recover a Lost Root Password in Linux

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 […]

20 January

Loops(for while until) in Shell Scripting

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 […]

27 November

How to Access Pen-drive in Windows Sub-System for Linux

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 […]

13 November

Using if-else in Shell Scripting

In the previous post, we learned how to use variables in shell script. Next, we are going to learn about using if-else in shell scripting. The if-else construct is used whenever we want to evaluate a condition i.e., whether some condition is true or false. Syntax if [ condition ] then   statement 1   […]

11 October

Using Variables in Shell Scripting

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 […]

07 October

What is Shell Scripting?

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 […]

22 September

Difference between read write and execute permissions

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. […]