![]() ![]() Why does sudo fail with this error message ‘sudo: no tty present and no askpass program specified’?Įrror ‘sudo: no tty present and no askpass program specified’ means you cannot use sudo unless someone logged in as root or the user has been granted permission to run commands without a password for this session. When user larry logs in to the machine, he can run the sudo command to shutdown the machine as shown below. To give user larry the ability to shutdown the machine, add the line below to the sudoers file: larry ALL=(ALL) NOPASSWD: /sbin/shutdown Sorry, user larry is not allowed to execute '/usr/sbin/shutdown' as root on. Without the sudo permission, larry would see this error message: $ sudo shutdown The sudoers file must be edited by running $ sudo visudoįor example, suppose you want to give user larry permission to shutdown a machine. The first match found will be used for sudo command request. The sudoer configuration file is parsed in textual order, so it starts to parse from top to bottom of the document. The sudoers configuration file is located at /etc/sudoers. The sudoers file is a configuration used to configure sudo in Linux. That’s why it’s always a good idea to be cautious when using the “sudo” command, and to make sure you understand what the command is doing before you run it. If you’re not careful, you can accidentally damage your system or expose it to security vulnerabilities. It’s also important to remember that running commands with superuser privileges carries a certain level of risk. This can be useful if you need to run a command with elevated privileges, but you don’t want to run it as the superuser. For example, you can use the “su” command to switch to the superuser account or “sudo -s” to start a new shell session with superuser privileges.Īnother alternative is to use “sudo -u” to run a command as a specific user, rather than the superuser. It’s worth noting that, depending on your specific use case, there may be alternative ways to achieve the same goal without using the “sudo” command in a non-interactive environment. This can be done by checking the user’s permissions in the /etc/sudoers file.
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