OHS2 on Ubuntu (error loading shared libraries)

Trying to install the Oracle HTTP Server powered by Apache 2, I got the following errors:

/oracle/as/10.1.3/ohs/bin/apachectl startssl: execing httpd
/oracle/as/10.1.3/ohs/bin/httpd: error while loading shared libraries: libgdbm.so.2: cannot open shared object file: No such file or directory

That can be resolved by:

sudo ln -s /usr/lib/libgdbm_compat.so.3.0.0 /usr/lib/libgdbm.so.2

The next error on the opmn http log will be:

/oracle/as/10.1.3/ohs/bin/apachectl startssl: execing httpd
/oracle/as/10.1.3/ohs/bin/httpd: error while loading shared libraries: libdb-3.3.so: cannot open shared object file: No such file or directory

In order to resolve that, execute:

sudo ln -s /usr/lib/libdb-4.7.so /usr/lib/libdb-3.3.so