sed stands for stream editor. It is a very essential tool for text processing, and a marvelous utility to play around with regular expressions. A well-known usage of the sed command is for text replacement. This recipe will cover most of the frequently-used sed techniques.
sed can be used to replace occurrences of a string with another string in a given text.
It can be matched using regular expressions.
$ sed 's/pattern/replace_string/' fileOr:
$ cat file | sed 's/pattern/replace_string/'This command reads from
stdin.By default,
sedonly prints the substituted text. To save the changes along with the substitutions to the same file, use the-ioption. Most of the users follow multiple redirections to save the file after making a replacement as follows:$ sed 's/text/replace/' file >newfile $ mv newfile file
However...