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→Using the sed Utility
*'''Note:''' when using regular expressions, you must delimit them with a forward-slash"/"<br>default address (if none is specified) will match every line
[[Image:sed.png|thumb|right|500px|Instructions '''Common instructions''' to take action if text matches an address.]]
'''Instruction:'''
*'''Action ''' to take for matched line(s)*Refer to table on right-side for list of some '''common instructions ''' and their purpose
'''Examples:'''
===Using the awk Utility===