I want to export
LD_LIBRARY_PATH to system services and all users.
System services are run before login, so
.bashrc is not applicable.
How to achieve this?
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You don't need to. Add the directory to
/etc/ld.so.conf or a new file in
/etc/ld.so.conf.d/, depending on distro.
After that, you must run (at least on Redhat)
ldconfig as root.
As a word of caution, you need to be careful which libraries you add to the system shared library path (via the environment, ld.so.conf, or putting in /usr/local/lib). In particular, you beware of two different versions of the same library with the same soname. E.g., if you have a libfoo.0.1 (soname libfoo.0) installed via dpkg/rpm/etc., you don't want a libfoo.0.2 (also soname libfoo.0) in your custom library directory.
(It's actually not that easy to pull off a system-wide environment variable. You can get most user logins with
/etc/environment. Scripts will depend on your init system, but (for example) with sysv init on Debian, you could put it in
/etc/default/rcS. Anything run straight out of inittab, well, I don't think you can.)
You can add every path in the file in
/etc/ld.so.conf.d then run :
Then load them.