Question

Which option is used with touch command to change the time of last file modification?

(a) -a

(b) -m

(c) -r

(d) -i

I had been asked this question by my school teacher while I was bunking the class.

My question is from Advanced File Handling Commands topic in portion Customizing the Environment & More File Attributes of Unix

Answer 1

Correct option is (b) -m

The explanation is: Touch command when used with -m option and an expression will change the modification time of the file. For example,