Unlike typical Linux servers where you can append init=/bin/bash to the kernel boot line, F5’s proprietary TMOS (Traffic Management Operating System) requires a specific procedure using the and the boot manager . Prerequisite: This method requires physical or out-of-band (iLO/iDRAC/IPMI) console access to the device. It will not work over SSH. Method 1: The Standard Recovery (SINGLE User Mode) This is the safest method and works for BIG-IP versions 11.x through 17.x. Step 1: Access the Console & Reboot Connect via serial console. If the device is running, issue the command:
chroot /mnt/sysimage Now reset the password: F5 Recover Root Password
While recovering a lost root password is stressful, F5’s reliance on standard Linux bootloaders makes it straightforward. before your production system locks you out on a change control Friday night. Disclaimer: The information provided is for administrative use on systems you own or have explicit permission to manage. Unauthorized password recovery attempts may violate security policies and laws. Unlike typical Linux servers where you can append
Introduction
If you booted into "single" user mode, the mcpd (Management Control Process) likely did not start. After logging in normally with your new password, run: Method 1: The Standard Recovery (SINGLE User Mode)
mount -o remount,rw / Type passwd and enter your new root password twice: