OEM一旦建立以后，LINUX的主机名(hosts)就不要去改变。

[oracle@redhat4 ~]$ emctl start dbconsole
OC4J Configuration issue. /u01/app/oracle/product/11.2.0/dbhome_1/oc4j/j2ee/OC4J_DBConsole_redhat4.7_ORCL not found.
[oracle@redhat4 ~]$ cd /u01/app/oracle/product/11.2.0/dbhome_1/oc4j/j2ee/
[oracle@redhat4 j2ee]$ ls -l
total 72
-rw-r--r--   1 oracle oinstall 1006 Oct  6 16:20 deploy_db_wf.ini
drwxr-xr-x  14 oracle oinstall 4096 Oct  6 16:17 home
drwxr-xr-x   3 oracle oinstall 4096 Oct  6 16:15 oc4j_applications
drwxr-x---   6 oracle oinstall 4096 Oct  6 16:15 OC4J_DBConsole
drwxr-x---  10 oracle oinstall 4096 Oct  6 17:36 OC4J_DBConsole_redhat4.7_ora11g
drwxr-x---  10 oracle oinstall 4096 Oct  6 16:27 OC4J_DBConsole_redhat4.7_orcl
drwxr-xr-x   5 oracle oinstall 4096 Oct  6 16:15 OC4J_Workflow_Component_Container
drwxr-xr-x   5 oracle oinstall 4096 Oct  6 16:15 OC4J_Workflow_Management_Container
drwxr-xr-x   2 oracle oinstall 4096 Oct  6 16:17 utilities
[oracle@redhat4 ~]$ vi .bash_profile

# .bash_profile

# Get the aliases and functions
if [ -f ~/.bashrc ]; then
        . ~/.bashrc
fi

# User specific environment and startup programs

PATH=$PATH:$HOME/bin

export PATH
unset USERNAME

export ORACLE_BASE=/u01/app/oracle
export ORACLE_HOME=/u01/app/oracle/product/11.2.0/dbhome_1
export ORACLE_SID=orcl
#export ORACLE_SID2=ora11g
export NLS_LANG=AMERICAN_AMERICA.ZHS16GBK
export PATH=$PATH:$ORACLE_HOME/bin:.
export ORACLE_UNQNAME=$ORACLE_SID

[oracle@redhat4 ~]$ source .bash_profile
[oracle@redhat4 ~]$ emctl status dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.2.0.1.0
Copyright (c) 1996, 2009 Oracle Corporation.  All rights reserved.
https://redhat4.7:1158/em/console/aboutApplication
Oracle Enterprise Manager 11g is running.
------------------------------------------------------------------
Logs are generated in directory /u01/app/oracle/product/11.2.0/dbhome_1/redhat4.7_orcl/sysman/log

[oracle@redhat4 ~]$ export ORACLE_SID=ora11g
[oracle@redhat4 ~]$ emctl status dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.2.0.1.0
Copyright (c) 1996, 2009 Oracle Corporation.  All rights reserved.
https://redhat4.7:5500/em/console/aboutApplication
Oracle Enterprise Manager 11g is running.
------------------------------------------------------------------
Logs are generated in directory /u01/app/oracle/product/11.2.0/dbhome_1/redhat4.7_ora11g/sysman/log

https://redhat4.7:1158/em/

https://redhat4.7:5500/em/

[oracle@redhat4 ~]$ netstat -tulnp|grep 1158  #port
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
tcp        0      0 :::1158                     :::*                        LISTEN      9936/java
[oracle@redhat4 ~]$ netstat -tulnp|grep 5500   #port
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
tcp        0      0 :::5500                     :::*                        LISTEN      22639/java

[oracle@redhat4 ~]$ w
21:06:10 up  7:43,  4 users,  load average: 0.05, 0.06, 0.07
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT
root     192.168. 192.168.10.1     13:28    0.00s  0.00s  0.13s /usr/bin/gnome-session
root     :0       -                14:22   ?xdm?  16:10   0.06s /usr/bin/gnome-session
root     pts/1    192.168.10.1:0.0 19:40    4:25   0.07s  0.07s -bash
root     pts/2    192.168.10.1     20:59    0.00s  0.00s  0.00s w