由于修改了操作系统的时间区域，在运行emctl start dbconsole的时候会出现如下信息：
Timezone mismatch: The agentTZRegion value (US/Eastern) in
/oracle/product/10.2.0/db_1/localhost.localdomain_test/sysman/config/emd.properties
does not match the current environment TZ setting(PRC).
The dbconsole cannot run with this mismatch.
If US/Eastern is the correct timezone, set your timezone environment variable to US/Eastern and repeat the 'emctl start dbconsole' operation.
If US/Eastern is not the correct timezone, make sure that the timezone in your environment is correct, and then run the following command in your local Oracle Home: 'emctl resetTZ agent'
The output of this command will include detailed instructions to follow, to correct the mismatch.
我们按上面的提示，运行emctl resetTZ agent，再次运行emctl start dbconsole就正常了。
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