learn-shell

shell scripts for DevOps

This repo is for DevOps journey....

list of shell commands topics

1.Printing 2.Variables 3.Conditions 4.Functions 5.Loops 6.SED Editor

sed

1.Delete a line 2.Add aline 3.Change a line 4.Search and replace a word

Sed is availabele in two forms

1. Display the changes on screen

sed 'ACTION ' file

2. Edit the file

sed -i 'ACTION' file

Action criteria can be picked in two ways

1.Line Number based 2.String search based

Example like , if we wan to delete a line.

For line no criteria

For search string criteria

sed '/word/ d' file 

Both the above examles will be just displaying the output, However if we want to edit the file

Edit the file

sed -i 'ld' file
sed -i '/word/ d'file