![]() b' The -b ( background) option tells sudo to run the givencommand in the background. If no askpass program is available, sudo will exit with an error. For example: # Path to askpass helper program Otherwise,if /etc/nf contains a line specifying the askpassprogram, that value will be used. If the SUDO_ASKPASS environment variable isset, it specifies the path to the helper program. If the -A ( askpass) option isspecified, a (possibly graphical) helper program is executedto read the user's password and output the password to thestandard output. A' Normally, if sudo requires a password, it will read itfrom the user's terminal. If an I/O plugin is configured, the running command's input and output may be Security policies may log successful and failed attempts to use sudo. When invoked as sudoedit, the -e option (described below), is implied. The cached credentials without running a command. By running sudo with the -v option, a user can update Sudoers policy caches credentials for 5 minutes, unless overridden in sudoers(5). Security policies may support credential caching to allow the user to run sudo again for a period of time without requiring authentication. This limit is policy-specific the default password prompt timeout for the sudoers security policy is 5 minutes. If authentication is required, sudo will exit if the user's password is not entered within a configurable Password or another authentication mechanism. The policy may require that users authenticate themselves with a The security policy determines what privileges, if any, a user has to run sudo. See the PLUGINS section for more information. The default security policy is sudoers, which is configured via the file Logging plugins to work seamlessly with the sudo front end. ![]() Third parties can develop and distribute their own policy and I/O Sudo supports a plugin architecture for security policies and input/output logging. Sudo allows a permitted user to execute a command as the superuser or another user, as specified by the security policy.
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