linux无法启动netmgr
才装好oracle11g，sqlplus可以正常使用，netmgr却启动不了，报以下错误:
[oracle@Henry ~]$ netmgr
正在退出
java.lang.NullPointerException
  at oracle.ewt.lwAWT.BufferedApplet.<init>(Unknown Source)
  at oracle.sysman.emSDK.client.appContainer.WebApplication.<init>(WebApplication.java:752)
  at oracle.net.mgr.container.NetApplication.<init>(Unknown Source)
  at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
  at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
  at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
  at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
  at java.lang.Class.newInstance0(Class.java:350)
  at java.lang.Class.newInstance(Class.java:303)
  at oracle.sysman.emSDK.client.appContainer.WebApplication.main(WebApplication.java:3316)
.bash_profile文件内容:
export PATH
export ORACLE_BASE=/home/oracle/app/oracle

export ORACLE_HOME=$ORACLE_BASE/product/11.2.0/dbhome_1

export ORACLE_SID=orcl

export ORACLE_TERM=xterm

export NLS_LANG=AMERICAN

export ORA_NLS33=$ORACLE_HOME/common/nls/admin/data

export LD_LIBRARY_PATH=$ORACLE_HOME/lib:/usr/lib:/lib

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib

export LD_LIBRARY_PATH

export PATH=$PATH:$ORACLE_HOME/bin
export DISPLAY=127.0.0.1:0.0

求高手指点

------解决方案--------------------
请参考：http://www.linuxidc.com/Linux/2010-05/26291.htm