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NAME | SYNOPSIS | DESCRIPTION | CONFIGURATION DIRECTORIES AND PRECEDENCE | CONFIGURATION FORMAT | SEE ALSO | COLOPHON |
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ENVIRONMENT.D(5) environment.d 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
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 files are read from directories in /etc/, /run/, and
/usr/lib/, in order of precedence. Each configuration file in these
configuration directories shall be named in the style of
filename.conf. Files in /etc/ override files with the same name in
/run/ and /usr/lib/. Files in /run/ override files with the same name
in /usr/lib/.
Packages should install their configuration files in /usr/lib/. Files
in /etc/ are reserved for the local administrator, who may use this
logic to override the configuration files installed by vendor
packages. All configuration files are sorted by their filename in
lexicographic order, regardless of which of the directories they
reside in. If multiple files specify the same option, the entry in
the file with the lexicographically latest name will take precedence.
It is recommended to prefix all filenames with a two-digit number and
a dash, to simplify the ordering of the files.
If the administrator wants to disable a configuration file supplied
by the vendor, the recommended way is to place a symlink to /dev/null
in the configuration directory in /etc/, with the same filename as
the vendor configuration file. If the vendor configuration file is
included in the initrd image, the image has to be regenerated.
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.
EachKEY must be a valid variable name. Empty lines and lines
beginning with the comment character "#" are ignored.
Example
Example 1. 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/}
systemd(1), systemd-environment-d-generator(8),
systemd.environment-generator(7)
This page is part of the systemd (systemd system and service manager)
project. Information about the project can be found at
⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have a bug
report for this manual page, see
⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩. This
page was obtained from the project's upstream Git repository
⟨https://github.com/systemd/systemd.git⟩ on 2018-02-02. (At that
time, the date of the most recent commit that was found in the repos‐
itory was 2018-02-02.) If you discover any rendering problems in
this HTML version of the page, or you believe there is a better or
more up-to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not part
of the original manual page), send a mail to man-pages@man7.org
systemd 234 ENVIRONMENT.D(5)
Pages that refer to this page: systemd.directives(7), systemd.index(7)
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