Cymen's Blog » console http://blog.cymen.org Fri, 03 Feb 2012 17:53:55 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Linux – Securely redirecting console to virtual terminal for logging http://blog.cymen.org/2008/10/16/linux-securely-redirecting-console-to-virtual-terminal-for-logging/?utm_source=rss&utm_medium=rss&utm_campaign=linux-securely-redirecting-console-to-virtual-terminal-for-logging http://blog.cymen.org/2008/10/16/linux-securely-redirecting-console-to-virtual-terminal-for-logging/#comments Thu, 16 Oct 2008 22:43:53 +0000 Cymen http://blog.cymen.org/?p=18 I want to be able to log a ssh session to a unused virtual terminal (/dev/ttyX) so that I can leave something running yet not allow any intrusion into the ssh session by unauthorized users at the keyboard. This is what I ended up doing:

  1. Give user write access to /dev/tty devices.
  2. Install screen and script.
  3. Run screen with simple “screen”.
  4. Run script with output to virtual terminal and flushing option: “script -f /dev/ttyX”.
  5. Do regular ssh session and begin whatever it is you want to monitor.
  6. Disconnect from screen’ed session (CTRL-a d).
  7. Switch to virtual terminal script is dumping to.
This works out quite well in practice — I’m not noticing any issues and it is fairly simple to accomplish. On my debian etch install, I had to add my user to the root group (or I could have given all users write access to /dev/tty devices).
]]> http://blog.cymen.org/2008/10/16/linux-securely-redirecting-console-to-virtual-terminal-for-logging/feed/ 0