TNS-01201: Listener cannot find executable

After configured the listener file, i tried to start my listener following error occurs, 

LSNRCTL> start
Starting /home/oracle/oracle/product/10.2.0/db_1/bin/tnslsnr: please wait…  

TNSLSNR for Linux: Version 10.2.0.1.0 – Production
System parameter file is /home/oracle/oracle/product/10.2.0/db_1/network/admin/listener.ora
Log messages written to /home/oracle/oracle/product/10.2.0/db_1/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost.localdomain)(PORT=1521)))
TNS-01201: Listener cannot find executable /home/oracle/oracle/product/10.2.0/db_1/bin/orcl for SID orcl Listener failed to start. See the error message(s) above… 

 This is my listener.ora file 

SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /home/oracle/oracle/product/10.2.0/db_1)
(PROGRAM = extproc)
)
(SID_DESC =
(SID_NAME = orcl)
(ORACLE_HOME = /home/oracle/oracle/product/10.2.0/db_1)
(PROGRAM= orcl)
)
(SID_DESC =
(SID_NAME = mydb)
(ORACLE_HOME = /home/oracle/oracle/product/10.2.0/db_1)
(PROGRAM= mydb)
)
) LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost.localdomain)(PORT = 1521))
)
) 

 Tnsnames.ora file 

MYDB =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost.localdomain)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = mydb)
)
) ORCL =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost.localdomain)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = orcl)
)
) 

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

My mistake was when i configured the listener file, I couldnot change the SID_NAME where PROGRAM located in listener file. 

 (SID_DESC =
(SID_NAME = orcl)
(ORACLE_HOME = /home/oracle/oracle/product/10.2.0/db_1)
(PROGRAM= orcl)
)
(SID_DESC =
(SID_NAME = mydb)
(ORACLE_HOME = /home/oracle/oracle/product/10.2.0/db_1)
(PROGRAM= mydb)
) 

Here We should be put it SID_NAME here.
 

(SID_DESC =
(SID_NAME = orcl)
(ORACLE_HOME = /home/oracle/oracle/product/10.2.0/db_1)
(SID_NAME= orcl)
)
(SID_DESC =
(SID_NAME = mydb)
(ORACLE_HOME = /home/oracle/oracle/product/10.2.0/db_1)
(SID_NAME= mydb)
) 

Now my listener started and I could be able to connect with string. 

Status: 

Service “PLSExtProc” has 1 instance(s).
Instance “PLSExtProc”, status UNKNOWN, has 1 handler(s) for this service…
Service “mydb” has 1 instance(s).
Instance “mydb”, status UNKNOWN, has 1 handler(s) for this service…
Service “orcl” has 1 instance(s).
Instance “orcl”, status UNKNOWN, has 1 handler(s) for this service…
The command completed successfully