Unix utility SED provides an effective and versatile way of deleting one or more lines from a designated file to match the needs of the user. This Unix command is used for command line processing.

I want to do something like grep a file and then delete all the lines that are returned while leaving the rest of the lines intact. I know this should be fairly simple, but for some reason I can't ...

Carriage returns go back a long way – as far back as typewriters on which a mechanism or a lever swung the carriage that held a sheet of paper to the right so that suddenly letters were being typed on ...