Linux – starting oracle 10g on ubuntu, Listener failed to start

I have installed oracle 10g on a ubuntu 10.x, This is my first time installation. After installing I tried to start it with the command below.

tsegay@server-name:/u01/app/oracle/product/10.2.0/db_1/bin$ lsnrctl

LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 29-DEC-2010 22:46:51

Copyright (c) 1991, 2005, Oracle.  All rights reserved.

Welcome to LSNRCTL, type "help" for information.

LSNRCTL> start
Starting /u01/app/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 /u01/app/oracle/product/10.2.0/db_1/network/admin/listener.ora
Log messages written to /u01/app/oracle/product/10.2.0/db_1/network/log/listener.log
Error listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
TNS-12555: TNS:permission denied
 TNS-12560: TNS:protocol adapter error
  TNS-00525: Insufficient privilege for operation
   Linux Error: 1: Operation not permitted

Listener failed to start. See the error message(s) above...

my listener.ora file looks like this:

# 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)
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
      (ADDRESS = (PROTOCOL = TCP)(HOST = acct-vmserver)(PORT = 1521))
    )
  )

I can guess the problem is with permission issue, But i dont know where I have to do the change on permission.

Any help is appreciated …

EDIT##

When i run with the command sudo, i got this

tsegay@server-name:/u01/app/oracle/product/10.2.0/db_1$ sudo ./bin/lsnrctl start

LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 30-DEC-2010 01:01:03

Copyright (c) 1991, 2005, Oracle.  All rights reserved.

Starting ./bin/tnslsnr: please wait...

./bin/tnslsnr: error while loading shared libraries: libclntsh.so.10.1: cannot open shared object file: No such file or directory
TNS-12547: TNS:lost contact
 TNS-12560: TNS:protocol adapter error
  TNS-00517: Lost contact
   Linux Error: 32: Broken pipe