Starting SQLPlus in linux

How do you start sqlplus in linux? I know this is a service in windows.

From serverfault sandos

• Ah, it seems its this easy:

  isqlplusctl start'
  

  This requires the environment to be setup properly, which is often done in the login scripts of the oracle user:

   isqlplusctl stop
   ORACLE_HOME=/u01/app/oracle/product/10.1.0/db_1
   ORACLE_SID=test
   export ORACLE_HOME ORACLE_SID
   isqlplusctl start
  

  From sandos

• If you need console version of sqlplus, then:
  
  1) Install appropriate version of Oracle client downloaded from oracle.com
  2) Add this strings to your .bashrc (if shell is bash) in home folder
  

  ORACLE_HOME=/opt/oracle/product/11  #Change this if other
  export ORACLE_HOME
  
  TNS_ADMIN=$ORACLE_HOME/network/admin
  export TNS_ADMIN
  
  ORACLE_BASE=/opt/oracle
  export ORACLE_BASE
  
  LD_LIBRARY_PATH=$ORACLE_HOME/lib
  export LD_LIBRARY_PATH
  

  
  3) Run

  $ sqlplus /nolog
  SQL> connect sys@DBNAME as sysdba
  

  From dba.in.ua