Unable to start listener. Tried everything!!!

Question

Before somone snaps my head off for not researching this problem by searching this forum, I already have tried everything mentioned in all the posts. Here are some of the things going on:
Output of /etc/hosts
xx.255.xxx.xx sis-tor-em10g.concisetech.local sis-tor-em10g
127.0.0.1 localhost.localdomain localhost
Output of listener.ora
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /u01/app/oracle/product/10.2.0/db10g)
(PROGRAM = extproc)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = sis-tor-em10g.concisetech.local)(PORT = 1521))
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
Output of "lsnrctl start"
[oracle@sis-tor-em10g] lsnrctl start
LSNRCTL for Linux: Version 10.1.0.4.0 - Production on 24-APR-2007 14:46:23
Copyright (c) 1991, 2004, Oracle. All rights reserved.
Starting /u01/app/oracle/product/10.2.0/db10g/bin/tnslsnr: please wait...
TNS-12537: TNS:connection closed
TNS-12560: TNS:protocol adapter error
TNS-00507: Connection closed
Linux Error: 29: Illegal seek
Output of "lsnrctl serv"
[oracle@sis-tor-em10g] lsnrctl serv
LSNRCTL for Linux: Version 10.1.0.4.0 - Production on 24-APR-2007 14:46:41
Copyright (c) 1991, 2004, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=sis-tor-em10g.concisetech.local)(PORT=1521)))
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
Linux Error: 111: Connection refused
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC)))
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
Linux Error: 111: Connection refused
Output of "relink all" (Final Output)
make: *** [tnslsnr] Error 1
Output of sqlnet.log (I am putting this here cause I am not seeing any errors in the LISTENER.log file)
Fatal NI connect error 12545, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=tor-imp-db)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=dev9i.torimpdb)(CID=(PROGRAM=java)(HOST=sis-tor-em10g)(USER=oracle))))
VERSION INFORMATION:
TNS for Linux: Version 10.1.0.4.0 - Production
TCP/IP NT Protocol Adapter for Linux: Version 10.1.0.4.0 - Production
Time: 24-APR-2007 14:27:39
Tracing not turned on.
Tns error struct:
ns main err code: 12545
TNS-12545: Connect failed because target host or object does not exist
ns secondary err code: 12560
nt main err code: 515
TNS-00515: Connect failed because target host or object does not exist
nt secondary err code: 0
nt OS err code: 0
Now from reading everyone's posting regarding this issue, what is the problem here since my host file seems to be correct.
HELP!!!! IT WAS WORKING ABOUT 30 MINUTES AGO!!!!

Answer 1

Thanks for everyone's help in this critical matter. So basically I am back at the begining. The listerner will not start. I have made all the changes that people have asked me to do and did a reboot. Also to answer onw question from a posting before, the only thing that changed was I tried to upgrade the DB to 10.2.0.3 and I was unable to. So I then removed the 10.2.0 ORACLE_HOME and I am left with 10.1.0.4.
Here is what I have done so far:
OUTPUT OF /etc/hosts
127.0.0.1 localhost.localdomain localhost
10.255.200.79 sis-tor-em10g.concisetech.local sis-tor-em10g
OUTPUT OF LISTERNER
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /u01/app/oracle/product/10.2.0/db10g)
(PROGRAM = extproc)
(SID_DESC =
(SID_NAME = emrep)
(ORACLE_HOME = /u01/app/oracle/product/10.2.0/db10g)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = xx.255.x0x.xx)(PORT = 1521))
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
OUTPUT OF STARTING DB and LISTENER
[oracle@sis-tor-em10g] sqlplus "/as sysdba"
SQL*Plus: Release 10.1.0.4.0 - Production on Wed Apr 25 09:24:56 2007
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to an idle instance.
SQL> STARTUP
ORACLE instance started.
Total System Global Area 536870912 bytes
Fixed Size 780056 bytes
Variable Size 154147048 bytes
Database Buffers 381681664 bytes
Redo Buffers 262144 bytes
Database mounted.
Database opened.
SQL> exit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.1.0.4.0 - Pr oduction
With the Partitioning, OLAP and Data Mining options
[oracle@sis-tor-em10g] lsnrctl status
LSNRCTL for Linux: Version 10.1.0.4.0 - Production on 25-APR-2007 09:25:34
Copyright (c) 1991, 2004, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=xx.255.x0x.xx)(PORT=1521 )))
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
Linux Error: 111: Connection refused
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC)))
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
Linux Error: 111: Connection refused
[oracle@sis-tor-em10g] lsnrctl start
LSNRCTL for Linux: Version 10.1.0.4.0 - Production on 25-APR-2007 09:25:41
Copyright (c) 1991, 2004, Oracle. All rights reserved.
Starting /u01/app/oracle/product/10.2.0/db10g/bin/tnslsnr: please wait...
TNS-12537: TNS:connection closed
TNS-12560: TNS:protocol adapter error
TNS-00507: Connection closed
Linux Error: 29: Illegal seek
[oracle@sis-tor-em10g]
I hope this help you guys in return to help me out...PLEASE!!!!!