When Octave starts, it looks for commands to execute from the files in the following list. These files may contain any valid Octave commands, including function definitions.
octave-home/share/octave/site/m/startup/octavercwhere octave-home is the directory in which Octave is installed (the default is /usr/local). This file is provided so that changes to the default Octave environment can be made globally for all users at your site for all versions of Octave you have installed. Care should be taken when making changes to this file since all users of Octave at your site will be affected. The default file may be overridden by the environment variable OCTAVE_SITE_INITFILE.
octave-home/share/octave/version/m/startup/octavercwhere octave-home is the directory in which Octave is installed (the default is /usr/local), and version is the version number of Octave. This file is provided so that changes to the default Octave environment can be made globally for all users of a particular version of Octave. Care should be taken when making changes to this file since all users of Octave at your site will be affected. The default file may be overridden by the environment variable OCTAVE_VERSION_INITFILE.
~/.octavercThis file is used to make personal changes to the default Octave environment.
.octavercThis file can be used to make changes to the default Octave environment for a particular project. Octave searches for this file in the current directory after it reads ~/.octaverc. Any use of the cd command in the ~/.octaverc file will affect the directory where Octave searches for .octaverc.
If you start Octave in your home directory, commands from the file ~/.octaverc will only be executed once.
startup.mThis file is used to make personal changes to the default Octave environment. It is executed for MATLAB compatibility, but ~/.octaverc is the preferred location for configuration changes.
A message will be displayed as each of the startup files is read if you invoke Octave with the --verbose option but without the --silent option.
© 1996–2018 John W. Eaton
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https://octave.org/doc/interpreter/Startup-Files.html