The CLI has two modes: operational and configuration. When you log in to the device and the CLI starts, you are at the top level of operational mode.
To view a list of top-level operational mode commands, type a question mark (?) at the command-line prompt.
user@host> ?
Possible completions: clear Clear information in the system configure Manipulate software configuration information file Perform file operations help Provide help information monitor Show real-time debugging information mtrace Trace multicast path from source to receiver ping Ping remote target quit Exit the management session request Make system-level requests restart Restart software process set Set CLI properties, date/time, craft interface message show Show system information ssh Start secure shell on another host start Start shell telnet Telnet to another host test Perform diagnostic debugging traceroute Trace route to remote host
At the top level of operational mode are a number of broad groups of CLI commands that are used to perform the following functions:
To control the CLI environment, see Configuring the CLI Environment. To enter configuration mode, see CLI Configuration Mode. For information about the other CLI operational mode functions, see the JUNOS Software Administration Guide.