Getting CLI help

Procedure

To show the available commands that you can execute in the current command context, enter the ? symbol.
For example:
```
switch# ?
  boot          Reboot all or part of the system
  checkpoint    Checkpoint information
...
switch#
```
The ? symbol does not display on the screen when you enter it.

The commands that are available to you depend on your authority and the command context. In a given command context, you can list and execute the commands available in that context.
To show the available parameters for a command, enter the command followed by a space and then enter the ? symbol.
For example:
```
switch(config)# access-list ?
  all        All access-lists
  ip         Internet Protocol v4 (IPv4)
  ipv6       Internet Protocol v6 (IPv6)
  log-timer  Set ACL log timer length (frequency)
  mac        Ethernet MAC Protocol
switch(config)# access-list
```
After the CLI displays the information, it automatically displays the text you entered before you entered the ? symbol.

If there is no <cr> symbol at the end the command help output, the command is not complete as displayed. You must specify one of the listed parameters.

The <cr> symbol alone in the command help output indicates that there are no additional parameters and that you must press the enter key to complete the command. For example:
```
switch# list ?
  <cr>
switch# list 
```
The <cr> symbol at the end of the command help output indicates that the parameters preceding the <cr> are optional and you can enter the command as is displayed. For example:
```
switch# configure ?
  terminal    Configuration terminal (default)
  <cr>
switch# configure 
```

To show information about a parameter for a command, enter the command and parameter followed by a space, then enter the ? symbol.

For example:

switch(config)# access-list log-timer ?
  <30-300>  Specify value (in seconds)
  default   Default value (300 seconds)
switch(config)# access-list log-timer