Hi.. I badly need some help. Ive spent over 2 days going over every suggestion online and cant figure it out.
I have ORACLE 10 g installed on my linux box. Iam trying to connect using SQL Developer. All worked fine till yesterday when I did the reboot..
Symptoms are that I can connect to the local db using sqlplus. But I cant connect using Sql Dev. I get the following error:

Status: Failure -ORA 01034, ORA 27101, Error 2: No such file or directory

This is what my listner.ora looks like:
# listener.ora Network Configuration File: /u01/app/oracle/product/10.2.0/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /u01/app/oracle/product/10.2.0/db_1/)
(PROGRAM = extproc)
)
(SID_DESC =
(SID_NAME = specter)
(ORACLE_HOME = /u01/app/oracle/product/10.2.0/db_1/)
)
)


LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost.localdomain)(PORT = 1521))
)
)



And tnsnames.ora
SPECTER =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost.localdomain)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = specter)
)
)


EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
)
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
)
)