how to change TACACS password

Experts ,please  explain me ,hot to change a TACACS password.I was given the permission of read acces on all cisco switches and routers .

when i telnet to a switch i will be promted to enter user name and password,then
it will be in the usedmode.
ex: Core-SW1B>
and i can check the configurations of the switch and router,

how can i change the password after doing the telnet session,and after entering my username ,i want a new password to set up.For accesing this user promt.
Core-SW1B>

please explain me
anumitAsked:
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Don JohnstonInstructorCommented:
You will need priviliged level access to change the configuration.

Whoever assigned you the username/password will need to either raise your priviledge level or add config mode to your current priviledge level.

-Don
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mikebernhardtCommented:
If it is using TACACs then it is not stored on the router and you don't need to have config mode. You need to talk to the administrator of the TACACs server to find out how to change your password.
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noctotCommented:
You might need to bribe him with Mountain Dew. Admins love Mountain Dew.
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MarkDozierCommented:
NO, is Hot Dr. Pepper
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mikebernhardtCommented:
Starbucks venti mocha frappucino. That'll do it for sure.
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campbelcCommented:
I 2nd the Mountain Dew vote. Prefer the green dew over the red.
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fullermsCommented:
Experts correct me if i am wrong.

On logging in, the device throws up the TACACS user name prompt. If you enter the username and hit enter WITHOUT entering the password, the system should prompt you to change the password? You just enter the old password and then the new password twice.

Hope this helps.
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