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1.6. Post-Installation Setup

1.6.1. Shared Libraries

On some systems that have shared libraries (which most systems do) you need to tell your system how to find the newly installed shared libraries. The systems on which this is not necessary include BSD/OS, FreeBSD, HP-UX, IRIX, Linux, NetBSD, OpenBSD, Tru64 UNIX (formerly Digital UNIX), and Solaris.

The method to set the shared library search path varies between platforms, but the most widely usable method is to set the environment variable LD_LIBRARY_PATH like so: In Bourne shells (sh, ksh, bash, zsh)


or in csh or tcsh

setenv LD_LIBRARY_PATH /usr/local/pgsql/lib

Replace /usr/local/pgsql/lib with whatever you set --libdir to in step 1. You should put these commands into a shell start-up file such as /etc/profile or ~/.bash_profile. Some good information about the caveats associated with this method can be found at

On some systems it might be preferable to set the environment variable LD_RUN_PATH before building.

If in doubt, refer to the manual pages of your system (perhaps or rld). If you later on get a message like

psql: error in loading shared libraries cannot open shared object file: No such file or directory

then this step was necessary. Simply take care of it then.

If you are on BSD/OS, Linux, or SunOS 4 and you have root access you can run

/sbin/ldconfig /usr/local/pgsql/lib

(or equivalent directory) after installation to enable the run-time linker to find the shared libraries faster. Refer to the manual page of ldconfig for more information. On FreeBSD, NetBSD, and OpenBSD the command is

/sbin/ldconfig -m /usr/local/pgsql/lib

instead. Other systems are not known to have an equivalent command.

1.6.2. Environment Variables

If you installed into /usr/local/pgsql or some other location that is not searched for programs by default, you need to add /usr/local/pgsql/bin (or whatever you set --bindir to in step 1) into your PATH. To do this, add the following to your shell start-up file, such as ~/.bash_profile (or /etc/profile, if you want it to affect every user):


If you are using csh or tcsh, then use this command:

set path = ( /usr/local/pgsql/bin $path )

To enable your system to find the man documentation, you need to add a line like the following to a shell start-up file:


The environment variables PGHOST and PGPORT specify to client applications the host and port of the database server, overriding the compiled-in defaults. If you are going to run client applications remotely then it is convenient if every user that plans to use the database sets PGHOST. This is not required, however: the settings can be communicated via command line options to most client programs.