Once in the Linux shell, user can use the command pica_sh or cli (under /pica/bin) to launch the L2/L3 CLI (or XORP CLI).
To come back to the Linux Shell from the L2/L3 CLI (or XORP CLI), use the exit command.
PICOS go2cli Version
For PICOS go2cli version, the operation is different.
For PICOS go2cli version, users go to PICOS CLI prompt after log in:
At PICOS CLI prompt, run “start shell sh” to enter Linux shell.
If you want to return from the Linux shell back to the CLI prompt, run "exit".