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Thursday, January 19, 2012

Avocent Cyclades ACS console server password reset or reset unit factory defaults

Avocent Cyclades ACS console server password reset or reset unit factory defaults

The Avocent Cycaldes ACS console servers are great little units that run Linux and even give you full root console access. The root password is “tslinux” by default, but if it has been changed then you can boot the unit into single user mode by supplying the argument “single” to the Linux kernel selection during the boot process (make sure you put a space between the existing Kernel parameters and “single”) which will drop you to a root prompt.
On my unit, this line comes up as right at the start of the boot process:
Linux/PPC load: root=/dev/ram ramdisk=0x0001F000
So you would type ” single” (remember the space!) to give you:
Linux/PPC load: root=/dev/ram ramdisk=0x0001F000 single
Then just hit enter and the unit will boot up into single user mode and give you the root prompt.
At this point, if you want to restore the entire unit to the factory default settings which will erase all of the configuration, then just run “defconf” and then reboot the unit.
If you want to keep the existing configuration intact but just reset the password then you can just use the traditional Linux passwd tool to edit /etc/passwd:
[root@(none) /]# passwd
New password:
Re-enter new password:
Password changed
[root@(none) /]# saveconf
Checking the configuration file list…
Compressing configuration files into /tmp/saving_config.tar.gz … done.
Saving configuration files to flash … done.
[root@(none) /]# reboot
[root@(none) /]# Restarting system.

 Original link : http://new.spheron1.co.uk/2010/11/06/avocent-cyclades-acs-console-server-password-reset-or-reset-unit-factory-defaults/ 


  1. This article clears all the doubts and confusions that will have issues while pretending & not getting there where they want to. Excellent Article!!!
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  2. Thank you so much! This article save me from possibly hours of headaches!

  3. Important! Please pay attention that you must hit the space bar only once!
    Hitting it more times will increase the space between "Linux/PPC load: root=/dev/ram ramdisk=0x0001F000", & the word "single", & the process will fail!

  4. Awesome. Thank you sir! I just ordered one of these on my favorite used equipment site, and wanted to know how to go back to factory defaults before it showed up. This is exactly waht I needed!

  5. !!! Absolut SUPER !!! Thank you so much!!!

  6. This process applies for ACS 5000 ?