Command help needed in linux flavour OS

UNIX for Advanced & Expert Users
1

HI,

My requirement as below

Log with Error

  [INFO 12-03-01:04:10:25] Starting FeedRunner for feed: 200  Product example Items 
[INFO 12-03-01:04:12:40] Error FeedRunner for feed: 200 Product example Items
[INFO 12-03-01:04:20:25] Stopping FeedRunner for feed : 200  Product example Items Feed time taken 231743

Log without Error

[INFO 12-03-01:04:10:25] Starting FeedRunner for feed: 200  Product example Items 
[INFO 12-03-01:04:20:25] Stopping FeedRunner for feed : 200  Product example Items Feed time taken 2743

  1. What is the command to read last 15 minutes logs, for example my current time is 4:15PM and i need to read from 4:00PM to 4:15PM in the log mentioned above.

  2. How to check for 3 strings using grep, for example "200|Product example|Error"

  3. If 3 strings found print "success" or print "failed"

  4. How to call a URL in shell script, for example "http://localhost/mcfeeds/runfeed?feedid=200"

Please help me on this

Regards
Paulwintech