I cannot access my Oracle Enterprise Manager. I get an error Address not found. firefox can't find the server at localhost.localdomain_orcl. I was able to access the db fine yesterday. Then I changed the host address and now I cannot access the db. I tried setting the Oracle environment then seeing if the agent was running using emctl. I get an error "$ORACLE_HOME/bin/emctl EM Configuration issue. /u01/app/oracle/product/11.1.0/db_1/mission01 not found.
Where do I fix this problem?