BIG-IP Forgotten password

[Alain1]

Hello,

i am running F5 BIG-IP on vmware. i forgot the password for the root username.  by that i am not able to access F5 GUI through it's management IP address. how to change the root password from the CLI note that i am not able to login.

[Mohamed_Ahmed_Kansoh]

Hello @Alain1 , 

Please follow these KBs : 

https://support.f5.com/csp/article/K73551536
https://support.f5.com/csp/article/K4178 

> you need to reboot and go to single user mode.  

follow each step in within these KBs
Regards 

[Alain1]

[Mohamed_Ahmed_Kansoh]

@Alain1 , 
After getting single user mode prompt : 
Follow This KB : https://support.f5.com/csp/article/K35811337

Regards

[Mohamed_Ahmed_Kansoh]

Hi @Alain1 , 
I will summarize here all needed procedures to recover root password : 
After following these KBs : 
https://support.f5.com/csp/article/K73551536
https://support.f5.com/csp/article/K4178 
if it doesn’t with you. 
you should follow this KB as well : 
https://support.f5.com/csp/article/K35811337

I followed it and it worked as expected and Recovered the root password Back. 
this is the result : 

I hope it works with you. 
Regards 

[Alain1]

thank you mohamad, i did this step and password changed succesfully but when reboot and try to login with my new password it's not working

[Mohamed_Ahmed_Kansoh]

Could you please repeat the steps located in this KB : https://support.f5.com/csp/article/K35811337
maybe there are some missing points , as I followed it and tested it on my lab and it worked great. 

> also make sure with your bootlocation such as "HD1.1 or HD1.2 .... " to mount 

mount /dev/mapper/vg--db--sda-set.2._config /sysroot/config
mount /dev/mapper/vg--db--sda-set.2._var /sysroot/var

there are platforms uses vda instead of sda so you need to change it in each mount script. 

Try it and keep me updated