This document describes how to connect to the host UART console from an OpenBMC management system.
The console infrastructure allows multiple shared connections to a single host UART. UART data from the host is output to all connections, and input from any connection is sent to the host.
To connect to an OpenBMC console session remotely, just ssh to your BMC on port 2200. Use the same login credentials you would for a normal ssh session:
$ ssh -p 2200 [user]@[bmc-hostname]
If you're already logged into an OpenBMC machine, you can start a console session directly, using:
$ obmc-console-client
To exit from a console, type:
return ~ .
Note that if you're on an ssh connection, you'll need to 'escape' the ~ character, by entering it twice:
return ~ ~ .
This is because obmc-console-client is an ssh session, and a double ~ is required to escape the "inner" (obmc-console-client) ssh session.
Console logs are kept in:
/var/log/obmc-console.log
This log is limited in size, and will wrap after hitting that limit (currently set at 16kB).