oracle-xe ubuntu starting problem

problem:

root@lati:/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/bin# ./oracle_env.sh
/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/bin/nls_lang.sh: 108: /usr/lib/oracle/xe/app/oracle/product/10.2.0/server/bin/nls_lang.sh: [[: not found
/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/bin/nls_lang.sh: 110: /usr/lib/oracle/xe/app/oracle/product/10.2.0/server/bin/nls_lang.sh: [[: not found
root@lati:/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/bin# ./nls_lang.sh
./nls_lang.sh: 108: ./nls_lang.sh: [[: not found
./nls_lang.sh: 110: ./nls_lang.sh: [[: not found

solution:
in /usr/lib/oracle/xe/app/oracle/product/10.2.0/server/bin/nls_lang.sh
change:
#!/bin/sh
to
#!/bin/bash