cli-sedHow can I use sed command line options to modify text files?

The sed command line tool can be used to modify text files. It works by reading a file line-by-line and applying a set of operations on each line that matches a given pattern.

For example, the following code will replace all occurrences of the word hello with goodbye in the file hello.txt:

sed 's/hello/goodbye/g' hello.txt

The code consists of the following parts:

• sed: The sed command line tool.
• s/hello/goodbye/g: The s stands for substitution, hello is the pattern to be replaced, goodbye is the replacement, and g stands for global, meaning all occurrences of the pattern should be replaced.
• hello.txt: The file to be modified.

For more information about the sed command line tool, see the following resources:

• Sed Tutorial
• Sed Command in Linux/Unix with Examples

Edit this code on GitHub