MySQL合并列concat后再regexp怎么区分大小写？

Starting Oracle Net Listener...Done
Configuring Database...Done
Starting Oracle Database 10g Express Edition Instance...Done
Installation Completed Successfully.
/etc/init.d/oracle-xe: line 177: /etc/sysconfig/oracle-xe: No such file or directory
To access the Database Home Page go to "http://127.0.0.1:8080/apex"

1.安装完成后，倒数第二行报错：/etc/init.d/oracle-xe: line 177: /etc/sysconfig/oracle-xe: No such file or directory怎么回事？
2.http://127.0.0.1:8080/apex能进去，可是在终端输入sqlplus，找不到命令！

高手帮忙！