![]() ![]() The trick is using the -n / non-interactive option with sudo. Nagios ALL=NOPASSWD: /var/ossec/bin/list_agents -n Is sudo configured?Īdd the following to /etc/sudoers USING VISUDO!: UNKNOWN warning actually telling us what's wrong, like so: # sudo -u nagios bash /etc/nagios-plugins/ossec-agents.sh Instead of seeing a "Unable to parse output" error in Nagios we get a nice Is sudo configured?"Įcho "Add the following to /etc/sudoers USING VISUDO!:"Įcho -e "$(whoami)\tALL=NOPASSWD:\t$/bin/list_agents -n" If the sudo is not successful it gives a nice error plus the required config toĪdd to /etc/sudoers: AGENTS="$(sudo -n /var/ossec/bin/list_agents -n 2>&1)"Įcho "UNKNOWN: Unable to execute list_agents. In /etc/sudoers to allow calling the ossec command with elevated privileges. The nagios user should have a special exception The example below comes from a Nagios plugin which checks if an OSSEC ![]() With this referral link you'll get $100 credit for 60 days. You can also sponsor me by getting a Digital Ocean VPS. It means the world to me if you show your appreciation and you'll help pay the server costs. Go check it out!Ĭonsider sponsoring me on Github. ![]() I'm developing an open source monitoring app called Leaf Node Monitoring, for windows, linux & android. Please, if you found this content useful, consider a small donation using any of the options below: Recently I removed all Google Ads from this site due to their invasive tracking, as well as Google Analytics. Result error, you could just give a nice warning message plus the right sudo Putting the sudo line in your README and otherwise having a NRPE Unable to parse Thisįor example can be usefull in a Nagios plugin which requires sudo. Any questions or suggestions are always welcome.This is a simple trick to see if you can use passwordless sudo in a script. I hope you like this quick little tutorial about using sudo without password. You can configure sudo in a way that only commands of your choice can be run without password.įor example, if you want the apt update and apt upgrade to be run without entering the password for sudo in Ubuntu, here’s what you need to do.Īnd then add a line like this: user_name ALL=(ALL) NOPASSWD:/usr/bin/apt update, /usr/bin/apt upgrade Run only specific sudo commands without password Thankfully, there is a solution for that as well. It provides you some options to deals with the changes.īut it’s not a good practice to run all the sudo commands without password. (Q)uit and save changes to sudoers file (DANGER!) > /etc/sudoers: syntax error near line 3 <<<Į(x)it without saving changes to sudoers file When you try to save your changes, it performs a check and notifies if there is any syntax error. ![]() The visudo tool creates a new temp file where you can edit the sudoer file using the default text editor. This is why you a dedicated tool called visudo is used for editing sudo configuration file. If you make a syntax error while editing this file, the consequences can be fatal. Now, you may edit /etc/sudoers file manually in a text editor like Vim, however, that is not advised. 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. Learn how to run some or all sudo commands without entering the password on Ubuntu or any other Linux distribution. ![]()
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