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→Using the sed Utility
'''Syntax: sed [-n] 'address instruction' filename'''
'''Address:'''
*Note: when using regular expressions, you must delimit them with a forward-slash"/" default address (if none is specified) will match every line
[[Image:sed.png|thumb|right|500px|Instructions to take action if text matches an address.]]
'''Instruction:'''
*Action to take for matched line(s)
