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.

A key point to these tools (from a practical point ) is that they are very memory efficient and allow work on just a "line".

The only thing wrong with sed is that most of us barely grasp how powerful it is. We use it in pipes to change "this" to "that", but we rarely consider it for the big editing jobs where it could save ...

The Linux expand and unexpand commands can turn tabs into spaces and spaces into tabs, and the sed and awk commands can help. The Linux expand and unexpand commands sound like they can make files ...

Apropos of nothing in particular, I remember back in the 80's Byte magazine having an article about using monode (single pole) semi-conductors to implement WOM (Write Only Memory). The 8bit I/O chips ...