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The PATH environment variable
[You can skip this section if you use a package manager like
MacPorts to install LilyPond; PATH should already be set up
correctly.]
Throughout the LilyPond manuals, examples simply show
lilypond as the program to call. However, this only
works if the PATH environment variable is adjusted so that
LilyPond’s binary directory is included.
Assuming that you have unpacked a LilyPond binary package for
version 2.25.15 within a directory /home/me, the binary
directory to be added to PATH is
/home/me/lilypond-2.25.15/bin
On Windows, a typical directory might be
C:\Users\me\lilypond-2.25.15\bin
Please consult the documentation for your operating system (or do
a search in the internet) how to actually modify PATH. In
case you are updating from an older LilyPond version you should
ensure that the old LilyPond binary directory is removed from
PATH; after everything is done you can check with a call to
lilypond --version whether the correct version gets found
on the command line.
If, for whatever reason, adjusting PATH is not possible or
appropriate, or if you have multiple LilyPond versions installed
in parallel, use the full path to the binary, for example
/home/me/lilypond-2.25.15/bin/lilypond music.ly