1. Download oracle-xe-client_10.2.0.1-1.0_i386.deb;
2. Click and wait installation completed;
3. cd /usr/lib/oracle/xe/app/oracle/product/10.2.0/client/bin
4. sudo vi nls_lang.sh, and replace "#!/bin/sh" by "#!/bin/bash", wq;
it will report errors if this step not ran:
./nls_lang.sh: 112: [[: not found
./nls_lang.sh: 112: [[: not found
5. ./sqlplus UNAME/PASSWORD@HOST/SERVICE_NAME
6. or run "connect UNAME/PASSWORD@HOST/SERVICE_NAME" after click on sqlplus shortcut from "Application" menu;