OUI-25031 error troubleshooting prompt when installing Oracle 10.2.0.1 grid control

The Web Cache Configuration Assistant check failed when installing Oracle 10.2.0.1 grid control in Configuration Assistants (Configuration Detection), prompting a OUI-25031 error, the solution is as follows:
 
The following error is reported:

Then, we can determine whether the http server of our default web site has a problem. Enter the command./opmnctl status to view it as follows:
 
Processes in Instance: EnterpriseManager0.xupeng. localdomain
------------------- + -------------------- + ---------
Ias-component | process-type | pid | status
------------------- + -------------------- + ---------
DSA | N/A | Down
HTTP_Server | N/A | Down
LogLoader | logloaderd | N/A | Down
Dcm-daemon | N/A | Down
Productname | home | 18846 | Alive
WebCache | 18857 | Alive
WebCache | WebCacheAdmin | 18848 | Alive

Http_server is not started. Normally, we will run one when installing gc. the/opmnctl start command starts these key services. We didn't see them here. The problem can be analyzed from now on. I feel that I have found the problem. I'm so excited.
 
Next, let's take a look at the http_server log, in/u01/app/oracle/OracleHomes/oms10g/opmn/logs/HTTP_Server ~ 1
 
An error occurred:/u01/app/oracle/OracleHomes/oms10g/Apache/bin/httpd: error while loading shared libraries: libdb. so.2: cannot open shared object file: No such file or directory. The error is that Apache does not find libdb on the local OS. to generate a library file for so.2, select a library file and run the command ln-s/usr/lib/libgdbm. so.2.0.0/usr/lib/libdb. so.2 generate soft link, OK!
 
Go back to the installation page and click retry. The system is excited ....
 
Http_server service Alive status
 
./Opmnctl status
 
Processes in Instance: EnterpriseManager0.xupeng. localdomain
------------------- + -------------------- + ---------
Ias-component | process-type | pid | status
------------------- + -------------------- + ---------
DSA | N/A | Down
HTTP_Server | 7129 | Alive
LogLoader | logloaderd | N/A | Down
Dcm-daemon | N/A | Down
Productname | home | 7130 | Alive
Productname | OC4J_EMPROV | 7131 | Alive
Productname | OC4J_EM | 7133 | Alive
WebCache | 25662 | Alive
WebCache | WebCacheAdmin | 7134 | Alive

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