#CENTOS PASSWORDLESS SUDO HOW TO#
#CENTOS PASSWORDLESS SUDO PASSWORD#

If you still have a problems you can look at the verbose output of the SSH command (e.g. There are a number of discussions online about what the ‘correct’ permissions for the home directory should be ( here for example) but the default values will work for SSH: I’ve also seen the problem that the home directory permissions are not set correctly (which will also cause the passwordless SSH to fail). passwordless sudo account on a Linux machine. Follow the steps below to create a sudo user on your CentOS server: 1.

#CENTOS PASSWORDLESS SUDO PASSWORD#

Sudo chmod 600 /home/USER/.ssh/authorized_keys sudo without password on CentOS Linux - nixCraft Web9 de oct. Your ‘ssh’ folder should have read, write and execute permission for the owner only (700) and the ‘authorized_keys’ file should have read and write permissions for the owner only (600): If you still cannot connect using your SSH key there is very likely a permissions problem. To resolve this you must again edit /etc/ssh/sshd_config and set:īy default it is set to ‘yes’ (this is an interesting difference between CentOS and Ubuntu).ĭon’t forget to restart the SSH service after making changes otherwise they won’t be updated: Before disabling the SSH password authentication make sure you can log in to your server without a password and the user you are logging in with has sudo privileges. Which is probably not what you want if you are trying to turn off password authentication. If there is a problem with the key then this setup will still go ahead and ask for a password when trying to connect via SSH.

Setting “PasswordAuthentication no” in /etc/ssh/sshd_config.

Whilst the wiki provides most of the information required to set up passwordless SSH on CentOS, namely: See below.The CentOS wiki page misses out a crucial step in setting up passwordless SSH. Looks like you can edit additional sudo config files with visudo. I should also mention that I used vim to create the new file within /etc/sudoers.d, as it seems that the visudo command is only for editing /etc/sudoers. Am I missing a step, like a restart/reload)? Configuring something wrong? Tried chmodding 755 on the app, but don't think that should make a difference, since ubuntu owns it anyway.Įven tried rebooting the system with no difference. However, if I log into the CentOS box as one of those same users from another system, I get prompted for the RSA key passphrase.

This works fine when using a terminal as the correct user directly on the CentOS computer. rwxr-r- 1 ubuntu ubuntu 1874 Oct 29 06:47 unicorn_my_app We have set up a CentOS 6.4 box with passwordless SSH to multiple other systems. Service is there in the init.d directory: $ ls -l /etc/init.d | grep unicorn However there's still a password prompt following running systemctl restart unicorn_my_app.service

(The hash sign in #includedir is not a comment, but part of the #include directive syntax). Replace username with the user name that you want to create. Create a new user account using the useradd command: useradd username. # See sudoers(5) for more information on '#include' directives: Start by logging in to your CentOS server via ssh as the root user: ssh rootserveripaddress.

Lets assume you want all sudo users (i.e. # Allow members of group sudo to execute any command The answer mentioning to set a host confused me, as I want to be able to have a sudo user be able to run privileged commands without requiring to consider such 'host aspect' any host should work, hence I use the special ALL reserved word. # Members of the admin group may gain root privileges

The sed command disables the includedir directive that would allow any files in subdirectories to override these inline updates.

#CENTOS PASSWORDLESS SUDO HOW TO#

# 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' The sed command does inline updates to the /etc/sudoers file to allow foo and root users passwordless access to the sudo group. # Please consider adding local content in /etc/sudoers.d/ instead of # This file MUST be edited with the 'visudo' command as root. %LimitedAdmins ALL=NOPASSWD: /bin/systemctl/unicorn_ofn_america restart, /bin/systemctl/unicorn_ofn_america startĬontent of /etc/sudoers/ is the default as confirmed with sudo visudo (or sudo cat /etc/sudoers): # %LimitedAdmins ALL=NOPASSWD: /etc/init.d/unicorn_ofn_america restart, /etc/init.d/unicorn_ofn_america start

Change with the username you want to add to the sudo group.

Have followed the instructions here to add user ubuntu to a newly created group, LimitedAdmins, which is confirmed with: $ getent group LimitedAdminsĬreated a new file, limitedadmins (using sudo vim) in the /etc/sudoers.d directory containing the following text: To do it in a traditional linux way using ansible :) Make a file, createuser.yml and add the following code. Specifically systemctl restart unicorn_my_app.service. I want the default user, ubuntu to be able to run a specific service without being prompted for a password.

Centos passwordless sudo