How to delete lines in text files using the Sed command

The command-line environment in Linux and Unix-like operating systems provides a plethora of tools for text processing. One such tool is sed, short for Stream EDitor. sed is an efficient and versatile tool that can parse and transform text. It's frequently used for a wide variety of text manipulation tasks in shell scripts. One common use case for sed is to delete lines in a text file.

Source: FOSS Linux