adadmin: error while loading shared libraries: libclntsh.so.10.1: cannot open shared object file

uid=501(appdemo) gid=501(dba) groups=50(ftp),501(dba)
$ adadmin
adadmin: error while loading shared libraries: libclntsh.so.10.1: cannot open shared object file: No such file or directory
$ cd  
$ ls
7476500_ZHS  8352586      8522002      afwflic.txt   getPost11510AMESetup.sql  Report_AppId-1.htm  wfstatus.txt
7651091      8352586_ZHS  8522002_ZHS  CUXMXD03.rdf  mbox                      sqlnet.log          wfver.txt
7651091_ZHS  8502056      action.txt   dead.letter   prefs.ora                 SupplierManagement
$ pwd
/home/appdemo
$ vi .profile

# .bash_profile

# Get the aliases and functions

# User specific environment and startup programs

PATH=$PATH:$HOME/bin

export PATH
unset USERNAME
. /install/oracle/VIS/apps/apps_st/appl/APPSVIS_demo.env
~