rcsdiff

Compare working file with latest revision

$ rcsdiff [file]

$ rcsdiff -r[1.1] -r[1.2] [file]

$ rcsdiff -u [file]

$ rcsdiff -c [file]

$ rcsdiff -r[1.5] [file]

$ rcsdiff -y [file]

rcsdiff [-r rev1] [-r rev2] [-u] [-c] file

rcsdiff compares revisions of files managed by the Revision Control System (RCS). Without a -r flag, it compares the current working file against the latest checked-in revision, showing local modifications. With one -r flag it compares the working file against a specific revision, and with two -r flags it compares two historical revisions directly.
The tool supports all standard diff output formats including unified (-u), context (-c), side-by-side (-y), and normal diff. It passes through options to the underlying diff command, making it a convenient wrapper for comparing version-controlled file histories.

-r REV

Revision to compare.

Unified diff output.

Context diff output.

Side by side.

Quiet mode.

RCS format output.

RCS is legacy system. Consider Git instead. File-level versioning only.

rcsdiff is part of RCS (Revision Control System), created by Walter Tichy in 1982 at Purdue University.

rcs(1), ci(1), co(1), diff(1)