I have tried login as an admin and then tried
bigip shell
user <username> password none <newpassword>
But it doesn't seem to work.
I have tried login as an admin and then tried
bigip shell
user <username> password none <newpassword>
But it doesn't seem to work.
The software is NOT the RedHat. BigIP has its own OS which is based on Redhat/CentOS, but RedHat ways won't work on BIGIP. Run version
in bpshell (or show sys version
in tmsh) to get the actual version of the software. Also search http://ask.f5.com for info like this. (eg. SOL3350).
Given the platform, it would likely be either v9.x.x or v10.x.x.
After you log in, just use "passwd" can change it: