Linux SED Command | SED Tutorial in Hindi | Linux for Beginners #6

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Linux SED (Stream Editor) Command Tutorial Hindi, SED Tutorial

Document link for commands – https://docs.google.com/document/d/1bDRq0TUUs-tqPjOpvWdGsqN9_txHmWVFQH3FC-FFy5g/edit?usp=sharing

Hi Guys,

sed (“stream editor”) is a Unix utility that parses and transforms text, using a simple, compact programming language.

sed is a line-oriented text processing utility: it reads text, line by line, from an input stream or file, into an internal buffer called the pattern space. Each line read starts a cycle.
To the pattern space, sed applies one or more operations which have been specified via a sed script. sed implements a programming language with about 25 commands that specify the operations on the text.

For each input line, after running the script, sed ordinarily outputs the pattern space (the line as modified by the script) and begins the cycle again with the next line.

Other end-of-script behaviors are available through sed options and script commands, e.g. d to delete the pattern space, q to quit, N to add the next line to the pattern space immediately, and so on.

Thus a sed script corresponds to the body of a loop that iterates through the lines of a stream, where the loop itself and the loop variable (the current line number) are implicit and maintained by sed.

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