environment.d

systemd
Developer Ray Strode rstrode@redhat.com
environment.d 5
environment.d Definition of user session environment

`~/.config/environment.d/*.conf`

`/etc/environment.d/*.conf`

`/run/environment.d/*.conf`

`/usr/lib/environment.d/*.conf`

`/etc/environment`

## Description

The `environment.d` directories contain a list of "global" environment variable assignments for the user environment. systemd-environment-d-generator 8 parses them and updates the environment exported by the systemd user instance to the services it starts.

It is recommended to use numerical prefixes for file names to simplify ordering.

For backwards compatibility, a symlink to `/etc/environment` is installed, so this file is also parsed.

## Configuration Format

The configuration files contain a list of `KEY=VALUE` environment variable assignments, separated by newlines. The right hand side of these assignments may reference previously defined environment variables, using the `${OTHER_KEY}` and `$OTHER_KEY` format. It is also possible to use `${FOO:-DEFAULT_VALUE}` to expand in the same way as `${FOO}` unless the expansion would be empty, in which case it expands to DEFAULT_VALUE, and use `${FOO:+ALTERNATE_VALUE}` to expand to ALTERNATE_VALUE as long as `${FOO}` would have expanded to a non-empty value. No other elements of shell syntax are supported.

Each KEY must be a valid variable name. Empty lines and lines beginning with the comment character `#` are ignored.

### Example

Setup environment to allow access to a program installed in `/opt/foo`

`/etc/environment.d/60-foo.conf`:

            FOO_DEBUG=force-software-gl,log-verbose
            PATH=/opt/foo/bin:$PATH
            LD_LIBRARY_PATH=/opt/foo/lib${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}
            XDG_DATA_DIRS=/opt/foo/share:${XDG_DATA_DIRS:-/usr/local/share/:/usr/share/}

## See Also

systemd 1, systemd-environment-d-generator 8, systemd.environment-generator 7