this is for unix, can you break it down step?

$3-$ Edit "myservices.txt$"$ using VI$/$VIM$,$ and go to the last line. Append the

following to the file:This is sample comment$4-$ Copy the content from line $205$ to $210,$ and past it just before the comment

inserted in $2).$

$5-$ Search for entry "remotefs" in the document, and remove all the rest of the

content of that line $($not "remotefs"$).$

$6-$ Issue the command to search and replace string $"540"$ with string $"541"$ in the

entire document.

$7-$ Locate the comment you inserted in $3),$ and delete all of it$.$

$8-$ Save the file and exit.