Linux 1st time Oracle 11g Ex SQL PLUS login with command line

[root@localhost bin]# . ./oracle_env.sh
[root@localhost bin]# . /u01/app/oracle/product/11.2.0/xe/bin/oracle_env.sh
[root@localhost bin]# $ sqlplus system
bash: $: command not found
[root@localhost bin]# sqlplus system

SQL*Plus: Release 11.2.0.2.0 Production on Mon Aug 19 17:28:51 2013

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Enter password:

Connected to:
Oracle Database 11g Express Edition Release 11.2.0.2.0 - 64bit Production

SQL> connect sys/123456 as sysdba
Connected.
SQL>