![]() Of course, you have to replace the user_name in the above command with your user name.Įxit the shell and enter again and you should see the changes reflected. All you have to do is to add a line like this in this file: user_name ALL=(ALL) NOPASSWD:ALL This will open the default text editor (Nano in Ubuntu) for editing this file. Use the following command to edit the /etc/sudoers file: sudo visudo Let’s see how to use sudo with no password.īut first, back up the sudoer file as a precautionary measure: sudo cp /etc/sudoers ~/sudoers.bak Execute all sudo commands without password Maybe, you should disable SSH access with password first. If you are on a server, you should be extra careful specially if you have SSH enabled. In Linux, you can change sudo configuration to run some or all command with sudo but without entering password. This is specially if you are the only user on the system or if you think some commands are okay to run without password. Some users may find it cumbersome to enter the password all the time. Which means that you’ll have to enter the password again if you run a command with sudo after fifteen minutes. ![]() The default timeout for the password is 15 minutes (in Ubuntu Linux). When you run a command with sudo, it asks for your account’s password. Most Linux distributions like Ubuntu, Debian, Fedora use the sudo mechanism to allow admin users to run commands with root privileges. Lucas) and this example works for me on multiple Linux & BSD machines.Learn how to run some or all sudo commands without entering the password on Ubuntu or any other Linux distribution. I did read a great (easy to read) book on it awhile ago ( Sudo Mastery by Michael W. Unfortunately I don't have much public documentation to point you to. Cmnd_Alias REBOOT = /sbin/halt, /sbin/reboot, \ Allowing members of the group wheel to run all commands, then specifically run commands in the REBOOT alias without a password. The following lines come from my sudoers file. # I do know what order this is interpreted in: # I don't know what order this is interpreted in: Multiple lines can help you to set the order. Multiple lines and rules are easier to read and understand in the future, when things get more complicated. It is mentioned in the documentation at that it is not most to least specific, unless you put them in order that way. It's the kind of thing I like to get right first time, can anyone confirm please that the last line will work (or, alternately, say it wont work) for the specific purpose in hand please?įurther if it works to allow fred to run service without a sudo password, is there a way I can restrict the arguments to service, so fred can only work without a password on service nginx, or even better, so fred can only restart that server without a password?Ĭommands at the bottom of the config override ones above. It appears that I may be able to use multiple Cmnd_Spec_Lists thusįred ALL=(ALL : ALL) ALL, NOPASSWD: /usr/sbin/serviceīut the documentation doesn't say that the latter NOPASSWD: Cmnd_Spec will override the ALL command root access for only that command. 'LOG_INPUT:' | 'NOLOG_INPUT:' | 'LOG_OUTPUT:' | Solaris_Priv_Spec ::= ('PRIVS=privset' | 'LIMITPRIVS=privset') SELinux_Spec ::= ('ROLE=role' | 'TYPE=type') ![]() Looking at the documentation's BNF User_Spec ::= User_List Host_List '=' Cmnd_Spec_List (':' Host_List '=' Cmnd_Spec_List)*Ĭmnd_Spec_List ::= Cmnd_Spec | Cmnd_Spec ',' Cmnd_Spec_ListĬmnd_Spec ::= Runas_Spec? SELinux_Spec? Solaris_Priv_Spec? Tag_Spec* Cmnd I want to give fred the ability to run all commands as root via sudo, with all except /usr/sbin/service requiring a password. The sudoers documentation isn't clear, but I believeįred ALL=(ALL) NOPASSWD: /usr/sbin/service I would like fred to be able to execute a restart of nginx on Ubuntu 14.04 without supplying a sudo password, while still retaining the ability to invoke sudo for other commands. I have an entry in /etc/sudo for a user who can execute sudo for all commands.Īs per the documentation the final ALL is responsible for allowing access to all commands.
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