grepa code code example

Example 1: grep and

# EXAMPLE: displays any lines that contain either "include this string" or "this works too" 
egrep "include this string|this works too" *

# SYNTAX:
# egrep "<pattern-1>|<pattern-2>" *

# egrep is combined with the "|" character (pipeline: normally the shift alternative to the "\" on the keyboard)

Example 2: how to grep

grep 'word' filename
fgrep 'word-to-search' file.txt
grep 'word' file1 file2 file3
grep 'string1 string2'  filename
cat otherfile | grep 'something'
command | grep 'something'
command option1 | grep 'data'
grep --color 'data' fileName
grep [-options] pattern filename
fgrep [-options] words file