LinuxQuestions.org - oracle client installation?

hi..
oracle newbie here..

i'm running mand8.2 and oracle 9i,(installation is straight forward)

me and my friends want a nice gui tool ..
tora looks like one we are looking for
however it says i need to have oracle client installation..

i remember i installed 'database' not client in install time.

do i have to install 'client'?
and then how can i install it? i have to run ./runinstaller again? (meaning i need Disk1/2/3
again --)

also i have related question or doubt about options that i gave during
installation.

listner doesn't run automatically when i startup oracle database?
as u can see HOST=beautifulmind.something.org ( changed to something) and
Service "mydb.beautifulmind.org"
which doesn't look right..
will this be a problem sometime? (well i don't know what listener is for)
if so, how can i correct this..

well, now my friends ssh to my comp and do sqlplus..
if i have 'tora' installed, they wouldn't need to ssh and directly connect to my oracle db?
thank you very much

[oracle@beautifulmind oracle]$ lsnrctl start
LSNRCTL for Linux: Version 9.2.0.1.0 - Production on 09-SEP-2002 14:38:57

Copyright (c) 1991, 2002, Oracle Corporation. All rights reserved.

Starting /usr/local/oracle/product/9.2.0/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 9.2.0.1.0 - Production
System parameter file is
/usr/local/oracle/product/9.2.0/network/admin/listener.ora
Log messages written to
/usr/local/oracle/product/9.2.0/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC)))
Listening on:
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=beautifulmind.something.org)(PORT=1521)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 9.2.0.1.0 - Production
Start Date 09-SEP-2002 14:38:58
Uptime 0 days 0 hr. 0 min. 0 sec
Trace Level off
Security OFF
SNMP OFF
Listener Parameter File
/usr/local/oracle/product/9.2.0/network/admin/listener.ora
Listener Log File
/usr/local/oracle/product/9.2.0/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC)))

(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=beautifulmind.something.org)(PORT=1521)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this
service...
Service "mydb.beautifulmind.org" has 1 instance(s).
Instance "test", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
[oracle@beautifulmind oracle]$