SED - Change

In essence, this is equivalent to Find and Replace.

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Add a leading angle bracket and space to each line (quote a message)

Add commas to numeric strings

Append a string after each line

Case-Insensitive Change

Change ALL instances in a line

Change multiple spaces to a single space

Change 1st instance in a line

Change 4th instance in a line

Change from Nth occurrence in a line

Change last instance in a line

Change lines in a file

Change lines which contain a specific string

Change lines which do NOT contain a specific string

Change next-to-last case

Change related words

Change string on a range of lines

Change string on a specific line number

Parenthesize first character of each word