* When using regular expressions, you must use forward slash(es) /

* If NO address is present, the instruction will apply to ALL lines

[[Image:sed.png|thumb|right|500px|'''Common instructions''' to take action if text matches an address.]]

*'''Action''' to take for matched line(s)

*Refer to table on right-side for list of some '''common instructions''' and their purpose

===Using the awk Utility===