Linux touch -r option
This command will update time with reference to the other mentioned command. There are two ways to use this command. Both works the same.
In below example, we want to change time-stamp of 'Demo.txt' with reference to 'demo.txt'. Firstyou can write it as,
First we'll see the status of both the files before using touch comand.
Now after using touch -r demo.txt Demo.txt command, time of Demo.txt has been changed wit reference to time of demo.txt