Enable serial console: Difference between revisions
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A | A FreeBSD server (especially if it is a headless one) will sometimes need a serial console. The FreeBSD handbook has an excellent [[http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/serialconsole-setup.html article]] on it, the summary can be summarized as such: | ||
Add the following line to <code>/boot/loader.conf</code>: | Add the following line to <code>/boot/loader.conf</code>: | ||
<pre> | <pre> | ||
| Line 21: | Line 21: | ||
A few things to remember: | A few things to remember: | ||
* The serial console allows root logins - to avoid this, remove the word <code>secure</code> from the line above. | * The serial console allows root logins - to avoid this, remove the word <code>secure</code> from the line above. | ||
* Worth noting if the server has a normal VGA/keyboard console: | * Worth noting if the server has a normal VGA/keyboard console: As far as I know, the console is ''either'' VGA or serial - when you reboot after enabling the serial console you will no longer get ''any'' output on the VGA console. | ||
* FreeBSD defaults to a serial console port setting of '''9600/8/n/1/off''' - that is, speed 9600, 8 bits, no parity, 1 stop bit, no flowcontrol. | * FreeBSD defaults to a serial console port setting of '''9600/8/n/1/off''' - that is, speed 9600, 8 bits, no parity, 1 stop bit, no flowcontrol. | ||
Revision as of 02:04, 12 April 2010
A FreeBSD server (especially if it is a headless one) will sometimes need a serial console. The FreeBSD handbook has an excellent [article] on it, the summary can be summarized as such:
Add the following line to /boot/loader.conf:
console="comconsole"
And change the following line in /etc/ttys:
# Serial terminals # The 'dialup' keyword identifies dialin lines to login, fingerd etc. ttyd0 "/usr/libexec/getty std.9600" dialup off secure
To:
# Serial terminals # The 'dialup' keyword identifies dialin lines to login, fingerd etc. ttyd0 "/usr/libexec/getty std.9600" vt100 on secure
A few things to remember:
- The serial console allows root logins - to avoid this, remove the word
securefrom the line above. - Worth noting if the server has a normal VGA/keyboard console: As far as I know, the console is either VGA or serial - when you reboot after enabling the serial console you will no longer get any output on the VGA console.
- FreeBSD defaults to a serial console port setting of 9600/8/n/1/off - that is, speed 9600, 8 bits, no parity, 1 stop bit, no flowcontrol.
