DZone Snippets is a public source code repository. Easily build up your personal collection of code snippets, categorize them with tags / keywords, and share them with the world
Search With Grep In Linux
Searching files grep (r - recursive, s - no messages, n -line number, i - case insensitve, H -with filename)
grep -rsniH your_string
match lines containing the string "I am a cat" or the string "I am a dog".
grep "I am a \(cat\|dog\)"
Search application to find PID (process ID) of a certain application or process,
find application port
netstat -a | grep ftp