search string command
 

1.i want to know command for search a string in file without opening file from vi editor.
2nd question.when i open file with vi editor in linux, i can search string by (in esc mode) "/search_string" command. This will search string from starting of file what will be command if i want to search string from "end of file" in "vi opened file".

1. grep.

please please describe in proper syntax and what is answer of 2nd question

You can use various utitlities to search file---eg GREP, SED, AWK

As for the VI question, does the manual (or man page) say anything about this?

You don't need the cat - grep pattern file works.

What do you mean by "proper syntax"? I don't see any syntax mistakes here. For any of these commands, the man page will give you the syntax.

Do you have some kind of reference material? (e.g. the Bash Guide for Beginners)

1. grep string file
2. :?string-to-find (? = search backwards)