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Don Burleson Blog 







UNIX user identification - who command, listener
Oracle Tips by Burleson Consulting

UNIX user identification

The UNIX who command can be used to show all users who are currently signed-on to the UNIX server. Note that the who command does not show Oracle users who have connected via the Oracle listener:

root> who|head -20
root ttyp1 Aug 31 19:09
tlmason ttyp2 Sep 4 08:31
dbogstad ttyp3 Sep 4 06:33
clarson ttyp4 Sep 4 07:20
mgeske ttyp5 Sep 4 06:35
vogden ttyp6 Sep 4 06:45
crmoore ttyp7 Sep 4 06:45
yliu ttyp8 Sep 4 06:47
mbell ttyp9 Sep 4 06:54
acook ttypa Sep 4 06:58
rwestman ttypb Sep 4 08:06
eboyd ttypc Sep 4 06:58
lhovey ttypd Sep 4 07:00
mepeter ttype Sep 4 07:10
klong ttypf Sep 4 07:02
ldoolitt ttyq0 Sep 4 07:36
dwilken ttyq1 Sep 4 08:16

We can enhance the who command to include a count of all users on our Oracle server. In this example, we see that there are 145 UNIX users connected to this Oracle server.

root> who|wc -l

The above is an excerpt from the "Oracle9i UNIX Administration Handbook" by Oracle press, authored by Donald K. Burleson.




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