Console Output and Serial Terminals: Difference between revisions
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To get the serial console status for this device use the '''systemctl''' command as follows: | A user login prompt should now be active on serial device: "'''/dev/ttyUSB0'''". To get the serial console status for this device use the '''systemctl''' command as follows: | ||
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<div class="userInput"><span class="prompt">[root@probe ~]# </span>systemctl status serial-getty@ttyUSB0.service</div> | <div class="userInput"><span class="prompt">[root@probe ~]# </span>systemctl status serial-getty@ttyUSB0.service</div> | ||
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To make this configuration permanent add the following: | To make this configuration permanent add the following: | ||
Revision as of 06:14, 21 May 2011
Overview
This page describes different methods for setting up a serial console post booting up an NST system. See Getting Started - Server Boot for setting up a serial console initially during a NST Live boot.
Serial Console On NST 2.13.0
Use the following command to manually enable the serial console on NST versions 2.13.0 using upstart. This example will set the serial baud rate to: "57600" and use serial device: "/dev/ttyS0".
[root@probe ~]#
Serial Console On NST 2.15.0 or Above
systemctl Bash Completion
Add Serial Console On Device: /dev/ttyS0
Use the following command to manually enable the serial console on NST versions 2.15.x or above using systemd. This example will use the current baud rate (agetty -s option) set typically during a boot time and use serial device: "/dev/ttyS0". If one needs to adjust the baud rate, send a break character on your communications application to cycle through the baud rate list (i.e., In this example: 115200, 38400 and 9600).
[root@probe ~]#
A user login prompt should now be active on serial device: "/dev/ttyS0". To get the serial console status use the systemctl command as follows:
serial-getty@ttyS0.service - Serial Getty on ttyS0
Loaded: loaded (/lib/systemd/system/serial-getty@.service)
Active: active (running) since Tue, 17 May 2011 16:59:56 -0400; 5min ago
Main PID: 31524 (agetty)
CGroup: name=systemd:/system/serial-getty@.service/ttyS0
└ 31524 /sbin/agetty -s ttyS0 115200 38400 9600
[root@probe ~]#
Add An Additional Serial Login Device: /dev/ttyUSB0
One can add an additional Serial user login session on a serial device. If your NST system does not have a physical serial port, you can add a USB To Serial Converter for user login. In this example we are adding a USB To Serial Converter which attaches as device: "ttyUSB0". Simply start a serial login on this device as follows:
[root@probe ~]#
A user login prompt should now be active on serial device: "/dev/ttyUSB0". To get the serial console status for this device use the systemctl command as follows:
serial-getty@ttyUSB0.service - Serial Getty on ttyUSB0 Loaded: loaded (/lib/systemd/system/serial-getty@.service) Active: active (running) since Fri, 20 May 2011 21:13:55 -0400; 3min 24s ago Main PID: 1273 (agetty) CGroup: name=systemd:/system/serial-getty@.service/ttyUSB0 └ 1273 /sbin/agetty -s ttyUSB0 115200 38400 9600 [root@probe ~]#
To make this configuration permanent add the following:
[root@probe ~]#
