.CD "sed \(en stream editor"
.SX "sed\fR [\fB\(enegn\fR]\fR [\fB\(enf \fIscript_file\fR]\fR [\fIedit_script\fR] [\fIfile\fR]"
.FL "\(ene" "Accept multiple commands commands on the commands line"
.FL "\(enf" "The following argument contains the edit script"
.FL "\(eng" "Set the global flag on all substitute commands"
.FL "\(enn" "Only output selected lines"
.EX "sed \(enf script <file" "Run a sed script on \fIfile\fR"
.EX "sed \(fm/pig/s//hog/g\(fm <file" "Replace \fIpig\fR by \fIhog\fR in the file"
.PP
\fISed\fR is a stream editor.
It takes an edit script either from its argument or a file, and performs
an edit session on a named file or \fIstdin\fR, producing output 
on \fIstdout\fR.



.SP 1