1) $ grep -n '^ South' DataFile
3: Southwest SW Lewis Dalsass 2.7
2) $ grep -i 'Pat' DataFile
Pat Huang Yuxiao
PS: The -i Option Turns Off Case Sensitivity (Nomatter LowerCase Or Uppercase).
3) $ GREP -V 'Li' Datefile
PS: The -v Option Prints All Lines Not Contain The Pattern 'Li'.
4) $ GREP -L 'SE' *
PS: The --l Option Only Prints The FileNames Where The Pattern is found.
5) $ grep -c 'West' DataFile
PS: The -c Option Causes Grep To Print How much line Which
Matches the pattern. (but if the pattern matches three Times in a line, IT
ONLY Count One Time)
6) $ grep -w 'north' DataFile
Ps: The -w Option Causees Grep To Find The Pattern Only IT IS A Word, Not
Part of Word. Only the line contain The Word North Is Printed, Not
Northwest.
Summary: grep can use combine with regular expression, so it's a powerful
Tool of UNIX.
GREP [-V] [-l] [-w] [-c] [-] [] [] [] [] []
