Programming

Here our requirement is to remove all the whitespace from the leading and ending space per line of a file. Our sample file /tmp/file    This is line one   This is line two  

In my last articles I had shown you the arguments to be used with sed to add or append any character in the beginning or end of the line and to ignore whitespace while grepping

Here our requirement is that we have a file where we have to perform a string replacement but based on line number. Below is our sample data /tmp/file 1 This is line one 2 This

Here our requirement is to replace a line with our content when a match is found with in the file Our sample file /tmp/file This is line one This is line two This is line

Before is the requirement for this example. I have a sample file with below content at /tmp/file This is line one This is line two This is line three This is line four Here in

In my last articles I had shared the arguments with sed which can be used to perform case insensitive actions (search, replace..) in a file and to delete all blank lines from the file. Before starting with some command

How to append a string after a match? For eg I have a text line "This is not test" where I would like to insert "really" after matching "is" Command: echo "This is not test"