Return
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Title
Error when using Sudo "sudo: no tty present and no askpass program specified" or "sudo: sorry, you must have a tty to run sudo" -
Description
When performing a "Check Password" or "Reset Password" you receive the error "sudo: no tty present and no askpass program specified" or "sudo: sorry, you must have a tty to run sudo" -
Cause
1. Configuration of sudo is incorrect. Instead of running the commands sudo is trying to request the users password. This fails as TPAM runs the commands interactively.
2. Sudo has been setup to require a tty. eg.
Defaults requiretty -
Resolution
CAUSE 1
- Ensure that the functional account commands are set with the NOPASSWD option and the sudoers is correctly setup.Eg:funcacct ALL=(root) NOPASSWD: /bin/grepfuncacct ALL=(root) NOPASSWD: /usr/bin/passwd
- Ensure that the Delegation Prefix in TPAM is correct, and includes the full path to the correct version of sudo.- Ensure that visudo is editing the same version of sudoders that sudo is using.
CAUSE 2
- Disable requiretty for the specific functional user by adding a default override
Defaults:funcacct !requiretty
Refer to KB 225796 "How is a functional account configured to leverage sudo on Linux/Unix systems in TPAM 2.5.x (225796)" for sudo configuration