How many connections are in use?

PostgreSQL: 8.2.4

OS: Linux Enterprise 4

Is there a way to log into PostgreSQL and determine how many database connections are in use?  I know how many I have allocated in the postgresql.conf file.  I would think there is some command in SQL or command line parameter that would tell me how many connections are currently being used.

Thanks,

Lance Campbell

Project Manager/Software Architect

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University of Illinois

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