Almost everything you need to do as administrator of an Ubuntu system can be done via sudo or gksudo. Enabling the root account is rarely necessary. Now you can reference this file to supply a password in your sudo command. This should now allow you to run the sudo command without being prompted for a password. A better method is to put your sudo password in a secure file. Note that the command above will show up in your terminal history, and also will be viewable by anyone looking over your shoulder. Notice we supply our password with the echo command first. As an example, we’ll run the whoami command with sudo privileges. You should also use the -k option, which will ensure that you get prompted for a password, even if you recently supplied it and have cached credentials.ġ. echo 'wheel ALL (ALL) NOPASSWD:ALL' sudo tee /etc/sudoers. This relies on sudo’s -S option, which will accept input from stdin. If youre experimenting with Desktop Mode and are tired of being prompted for your password all the time in the command line, you can use this command to bypass the password prompt. If you don’t want to permanently disable the sudo password, you could alternatively supply the sudo password in a command. If you need to revert these changes, simply delete the line that you appended to the file. %sudo ALL=(ALL:ALL) NOPASSWD: ALLĪll done. If you would like to grant every user the ability to bypass the sudo password prompt, you’ll want to append this code instead. Save your changes and exit the file when done, and the changes will take effect immediately.ģ. At the bottom of this file, append the following line, while replacing linuxnightly with the name of your user account. Type the following command to edit the /etc/sudoers file. To avoid the sudo prompt ever showing up when you execute a sudo command, follow the instructions below.ġ. Otherwise, anyone logging into your account will have root permissions. If your users are going to share and unshare on the command line, they won't need to run the commands without a password, but if they're going to include these commands in a script, removing the need to supply a password is actually a safer and better option than putting the password in the script.Obligatory warning: Disabling the sudo password is a bad idea unless you’re on a test system or you’re the only user on the computer. Sorry, user squarepants is not allowed to execute '/usr/sbin/share /var/data/logs' as root If squarepants uses the share or unshare command for the /var/data/reports directory, he will not be prompted for a password, but for any other directory, he will both be asked for a password and be denied. Squarepants ALL=NOPASSWD:/usr/sbin/unshare /var/data/reports Squarepants ALL=NOPASSWD:/usr/sbin/share /var/data/reports You might add these lines to your sudoers file: # Allow specific users to share and unshare reports Say your user's username is "squarepants" and you wanted him to be able to share and unshare a particular directory on a server. Instead, you could configure the account that will run the script to not required to supply a password for the particular command. If you do, you could send the password to sudo with an "echo password | sudo -S command" type of construct, but putting passwords in scripts is generally frowned on by the security-conscious admins among us. How do you allow a particular user to run a particular command via sudo without having to enter a password?įirst, why might you want to do this? Well, you might want to put a sudo command in a script. Let's take a look at what you have to do to configure exceptions to this behavior. But this doesn't always have to be the case. Execute the following command to modify the file / Etc / sudoers: Now in the content of said file you must attempting the line containing: And enter the. Users who run commands with sudo generally have to enter their own passwords to confirm their identities before sudo will run the commands with the authority of root. Thus the name "sudo" (for "superuser do"). Sudo is well known for its ability to provide very limited scope superuser privileges to otherwise normal users on Unix systems.
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