Passwordless auth is only enabled when the Yubikey is plugged in. What happens if the Yubikey is not plugged in? You'll be asked for your sudo password, as you would have been previously. What happens if you don't have your Yubikey nearby? + + auth sufficient common-session-noninteractiveĭocs for the pamu2fcfg util can be found here.įor reference, my versions at the time of writing: ❯ lsb_release -rd Session required pam_env.so readenv=1 envfile=/etc/default/locale user_readenv=0 Session required pam_env.so readenv=1 user_readenv=0 Lastly, configure the type of auth that the Yubikey will be used for by editing /etc/pam.d/sudo: # Set up user limits from /etc/security/nf. Pamu2fcfg > ~/.config/Yubico/u2f_keys # once the light blinks on your yubikey, press the button Mkdir ~/.config/Yubico # do not commit this directory to a dotfiles repo or anything like that Here is how to set up passwordless authentication with a Yubikey: sudo apt install libpam-u2f Since I've been using my desktop with its big screen, big GPU (not that I do GPU work), and faster-than-Apple-M1-maybe-same-as-M2 processor (AMD Ryzen 9), I want the same passwordless experience! On the frame.work, it uses a fingerprint reader, which makes sudo a breeze. See the man page for visudo for more information.I've been using my desktop computer a lot more lately, and one thing I miss from my frame.work laptop is the passwordless authentication / passwordless sudo. Feel free to add the above directive to the end of your /etc/sudoers file to enable this functionality for existing installations if you wish!įinally, please note that using the visudo command is the recommended way to update sudoers content, since it protects against many failure modes. ![]() ![]() sudo usermod -aG sudo userA sudo usermod -aG sudo userB. I have a couple of users, say userA and userB, who have been added to the sudo group. It is working well, or should I say too well. Note also, that because sudoers contents can vary widely, no attempt is made to add this directive to existing sudoers files on upgrade. On my Ubuntu system I followed the instructions for enabling sudo without a password. Note that there must be at least one file in the sudoers.d directory (this one will do), and all files in this directory should be mode 0440. This will cause sudo to read and parse any files in the /etc/sudoers.d directory that do not end in ~ or contain a. I had the same doubt related to how the vagrant user was able to sudo without being in the "standard" places where we are acquainted to check on CentOS 7.īut on Debian's "bullseye64" box you have the following README at /etc/sudoers.d/READMEĪs of Debian version 1.7.2p1-1, the default /etc/sudoers file created on installation of the package now includes the directive: #includedir /etc/sudoers.d Uid=1000(vagrant) gid=1000(vagrant) groups=1000(vagrant)Īnd, as expected, adding other users to the sudo group asks me for a password: sudo ls ![]() The vagrant user is not even in the sudo group: id -a How is passwordless sudo achieved for the vagrant user? # See sudoers(5) for more information on "#include" directives: Make sure you have a line something like this: centos ALL (ALL) NOPASSWD:ALL. Make sure that sudo is allowed for the user ansible is using without password. # Allow members of group sudo to execute any command Its not ansible its your servers configuration. # Members of the admin group may gain root privileges # See the man page for details on how to write a sudoers file.ĭefaults secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin" # Please consider adding local content in /etc/sudoers.d/ instead of # This file MUST be edited with the 'visudo' command as root. This is /etc/sudoers: sudo cat /etc/sudoers
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