Linux in a Nutshell, Fifth Edition

Group Summary of sed Commands | 759

sed

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afterward in the “Alphabetical Summary” section. Commands marked with a †

are specific to GNU sed.

Basic Editing

Line Information

Input/Output Processing

Yanking and Putting

Command Action

a\ Append text after a line.

c\ Replace text (usually a text block).

i\ Insert text before a line.

d Delete lines.

s Make substitutions.

y Translate characters (like Unix tr).

Command Action

= Display line number of a line.

l Display control characters in ASCII.

p Display the line.

Command Action

e† Execute commands.

n Skip current line and go to the next line.

r Read another file’s contents into the output stream.

R† Read one line from a file into the output.

w Write input lines to another file.

W† Write first line in pattern space to another file.

q Quit the sed script (no further output).

Q† Quit without printing the pattern space.

v† Require a specific version of GNU sed to run the script.

Command Action

h Copy into hold space; wipe out what’s there.

H Copy into hold space; append to what’s there.

g Get the hold space back; wipe out the destination line.

G Get the hold space back; append to the pattern space.

x Exchange contents of the hold and pattern spaces.