![]() ![]() The -t option makes sure a terminal is provided for this process. Hence, we’ll take a look at the second solution which is to use the ssh -t option: $ ssh -t _host "sudo reboot"įrom the example above, we are rebooting the remote machine _host via SSH. Fixed: sudo: no tty present and no askpass program specified. What if we want a user’s password input? For this reason, we would require a terminal. This ensures the user peter doesn’t get a prompt to input a password while using sudo. ![]() Note that this issue can also indicate a password prompt when you run a. Next, we scroll to the end of the file and add this line: peter ALL = (ALL) NOPASSWD: ALL sudo: no tty present and no askpass program specified. Now, we insert the user password to get access to the /etc/sudoers configuration file. That’s why we use the visudoprogram to open a text editor for checking errors in the configuration file during a file save. But sudo errors out: sudo: no tty present and no askpass program specified. This is because we can inadvertently lock out a user or all users out of the system. A good example is when we had to input our user password when trying to view sensitive information earlier:įirst, let’s open our Linux terminal and type in the command below: $ sudo visudoīefore we continue, let’s keep in mind that mistakes in the /etc/sudoers file can be very costly. This terminal enables us to write commands as input and get output. tty displays information on the terminal connected to our Linux system. The other command we’ll take a look at is tty. Since options 2 and 3 require a TTY (sudo wont read from a pipe) it wont run if it cant. the user entered the correct source password. the user entered the correct target password. If the user peter has the required superuser privileges to run the command above, it’s executed: $ sudo cat /etc/shadow sudo will only run a program as a different user if one of these 3 conditions has been met (as far as passwords are concerned): the NOPASSWD option is specified. In chroot environments, these other answers may not work correctly. yourExecutable This directs sudo to read the password from the standard input, stdin. It’s important to note that the /etc/ sudoers file is a special file that configures which users can use sudo and which cannot. Instead of running the commands sudo is trying to request the users password. sudo: no tty present and no askpass program specified Alternate Answer. Once we input the password, the system checks in the /etc/sudoers configuration file if the currently logged-in user has permission to make use of the sudo command. If you want passwordless login up to the root account (which is generally not a good idea from a security perspective), use SSH to reach the root account, preferably in two hops.We can see from the above input that a prompt appears to insert the user password. Note that you still need to have a terminal, even with NOPASSWD, if the requiretty option is set in the sudoers file. Sudo requires a password (unless you add the NOPASSWD tag in the sudoers file). If you expected the SSH passphrase to replace your password for authentication to sudo, that's not going to happen. If that's the problem, run ssh inside a terminal emulator such as Console2 or Mintty (included in the Cygwin distribution) - see Best way to use a shell with Cygwin in Windows 7. The Windows console does not completely emulate a unix terminal there may be some difficulty for Cygwin applications to properly emulate a terminal in these circumstances (I'm not sure about that, note). ![]() If you aren't able to enter the password even with -t, it's possible that your problem is due to Windows. See SSH inside SSH fails with "stdin: is not a tty" for a more detailed explanation. If you pass a command to ssh, it assumes that the command doesn't need a terminal and doesn't create one, unless you pass -t. The executed command will have no controlling terminal. You need to have a terminal available to run sudo so that it can prompt you for the password. Try to replace this: su - devops -c 'sh /path/to/myscript.sh' with this: sudo -u devops -H sh -c 'sh /path/to/myscript.sh' The -c option of su doesnt support interactive mode:-c, -command COMMAND Specify a command that will be invoked by the shell using its -c. Sudo: no tty present and no askpass program specified Is there not any way that you get password. Unfortunately, every time I run ssh 'sudo /var/I have also tried to add -t -t but then it prompts me for the password. When I run sudo command ,it throws error which reads sudo: no tty present and no askpass program specified. I then also tried to add 'newton ALL=NOPASSWD: /var/www/script.sh' I have setup SSH keys so when I run 'ssh it automatically logs me in, I have also set this user in visudo to be 'newton ALL=(ALL:ALL) ALL' I keep getting this error and have tried several ways discussed online to fix this and none are working for me. ![]()
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