After installation of oracle xe at the following in the .profile of the oracle users home dir:
export ORACLE_HOME=/usr/lib/oracle/xe/app/oracle/product/10.2.0/server
export PATH=$PATH:$ORACLE_HOME/bin
export ORACLE_SID=XE
Enable the web interface on other port than: 127.0.0.1:
exec dbms_xdb.setListenerLocalAccess(l_access => FALSE);