Linux Bash Scripting: How to combine two lines by removing newline character using sed

In this post we will see how to remove the newline character and combine two lines in a text file using "sed". In sed, we have single line version and multi-line version of few commands. One...

Linux Bash Scripting: How to create directories for each day of the current month

 In this post I have written a script that creates an empty directory for each day of the current month. I used cal command to get the date and month instead of using date command. The reason...

Linux Bash Scripting: How to remove a blank line after a particular line using sed

Removing a blank line after a particular line can be achieved using the single-line next command (n) of the sed editor. The lowercase n command tells the sed editor to move to the next line of...

Linux Bash Scripting: How to modify the ls command output using pr command

I have received the below question in our "Ask a question" section of this blog. Q: Using set -A write a script to print the output of the ls command in 5 columns with two spaces between each...

Linux Bash Scripting: Standard file descriptors STDIN, STDOUT and STDERR and input/ouput redirection

  Linux system handles every object as a file. This includes input and output processes also. The linux identifies each file using a file descriptor. What is a file descriptor? A file descriptor...

Linux Bash Scripting: how to rename or delete a file which has special characters in its filename

Suppose if you have created a file with a special character in its name because of a typo, you may not be able to access it. You may not even be able to delete the file. For example, see the below...

Linux Bash Scripting: Perform floating point calculation/arithmetic/operation using BC

  As we have discussed on performing Arithmetic operations on our previous post, now we will look at the floating point operations in the shell script in this post. You might want to look at...

Linux Bash Scripting: How to ignore specific commands from being stored in the history in Linux

If you see the history of your commands using the "history" command, you can see all the commands that you executed in the command line. If you don't want certain basic commands to be stored in...