Cisco IOS commands available at the PRIVILEDGED MODE prompt:

Cisco Internetwork Operating System Software
IOS (tm) C2600 Software (C2600-I-M), Version 12.2(12k), 
    RELEASE SOFTWARE (fc1)

Router>enable

Router#?
Exec commands:
  access-enable    Create a temporary Access-List entry
  access-profile   Apply user-profile to interface
  access-template  Create a temporary Access-List entry
  archive          manage archive files
  bfe              For manual emergency modes setting
  cd               Change current directory
  clear            Reset functions
  clock            Manage the system clock
  configure        Enter configuration mode
  connect          Open a terminal connection
  copy             Copy from one file to another
  debug            Debugging functions (see also 'undebug')
  delete           Delete a file
  dir              List files on a filesystem
  disable          Turn off privileged commands
  disconnect       Disconnect an existing network connection
  enable           Turn on privileged commands
  erase            Erase a filesystem
  exit             Exit from the EXEC
  help             Description of the interactive help system
  isdn             Run an ISDN EXEC command on a BRI interface
  lock             Lock the terminal
  login            Log in as a particular user
  logout           Exit from the EXEC
  monitor          Monitoring different system events
  more             Display the contents of a file
  mrinfo           Request neighbor and version information 
                    from a multicast router
  mrm              IP Multicast Routing Monitor Test
  mstat            Show statistics after multiple multicast 
                    traceroutes
  mtrace           Trace reverse multicast path from 
                    destination to source
  name-connection  Name an existing network connection

  
  no               Disable debugging functions
                   (no XXXX -> removes XXXX command from your 
                   running-config ! XXXX must match by param!)

  pad              Open a X.29 PAD connection
  ping             Send echo messages
  ppp              Start IETF Point-to-Point Protocol (PPP)
  pwd              Display current working directory
  reload           Halt and perform a cold restart
  rename           Rename a file
  restart          Restart Connection
  resume           Resume an active network connection
  rlogin           Open an rlogin connection
  rsh              Execute a remote command
  rtr              RTR Exec Configuration
  send             Send a message to other tty lines
  setup            Run the SETUP command facility
  show             Show running system information
  slip             Start Serial-line IP (SLIP)
  squeeze          Squeeze a filesystem
  start-chat       Start a chat-script on a line
  systat           Display information about terminal lines
  telnet           Open a telnet connection
  terminal         Set terminal line parameters
  test             Test subsystems, memory, and interfaces
  traceroute       Trace route to destination
  tunnel           Open a tunnel connection
  udptn            Open an udptn connection
  undebug          Disable debugging functions 
                    (see also 'debug')
  upgrade          Upgrade firmware
  verify           Verify a file
  where            List active connections
  write            Write running configuration to memory, 
                    network, or terminal
  x28              Become an X.28 PAD
  x3               Set X.3 parameters on PAD