Write the commands on Linux/Unix to perform the following networking tasks:

(i) change the value of MTU
(ii) shows number of hops taken to reach destination
(iii) display routing table information
(iv) shows and manipulate IP routing table

Write a shell script that searches the file contents in a directory and its sub-directories for a text string given by the user. It list all such file names having that given string and store in a temp file “example_dir”