Sudo Unknown User Postgres Sudo Unable To Initialize Policy Plugin
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If you have ever worked with Ubuntu, you might have encountered the error message that reads 'sudo unable to resolve host'. This is a commonly reported error message that can be pretty frustrating if you are not familiar with the solution. Fortunately, the solution is quite simple and straightforward, and we will explore it here.
Before we go into the solution, let us first understand what the error message means. Ubuntu is a Linux-based operating system that relies on domain name system (DNS) to translate domain names into IP addresses to access resources on the internet. When you attempt to run a sudo command, you need to provide the root password. However, the error message 'sudo unable to resolve host' indicates that the hostname of your system cannot be resolved by the DNS.
So, what could be the cause of this error message? One possibility is that the hostname of your system has not been registered in the DNS. This commonly happens when you clone a virtual machine or while setting up a new host. Alternatively, the error message could indicate that your system is unable to communicate with the DNS server, which could cause issues with hostname resolution.
Now that we have some background on what causes this error message let us move on to the solution. The solution involves editing a file known as 'hosts'. You can access the hosts file by navigating to the path /etc/hosts using your terminal. The hosts file contains a list of entries that map IP addresses to hostnames. The first entry in the hosts file maps the IP address 127.0.0.1 to the hostname 'localhost'.
To fix the 'sudo unable to resolve host' error message, you need to add an entry for your hostname to the hosts file. You should add an entry that maps the IP address of your system to its hostname. To do this, you need to edit the hosts file using a text editor. You can use any text editor of your choice to edit the hosts file.
Once you have opened the hosts file, you can add an entry for your hostname by appending the IP address of your system followed by your hostname. For example, if your hostname is 'mycomputer' and your IP address is '192.168.1.10', you should add the following entry to the hosts file:
192.168.1.10 mycomputer
After adding the entry to the hosts file, save the file and exit. You should now be able to run your sudo command without encountering the 'sudo unable to resolve host' error message.
In conclusion, the 'sudo unable to resolve host' error message is a commonly reported error message in Ubuntu. It indicates that the hostname of your system cannot be resolved by the DNS. The solution to this error message involves editing the hosts file and adding an entry that maps the IP address of your system to its hostname. With this solution, you should be able to run your sudo command without any issues.
Sudo unknown user postgres sudo unable to initialize policy plugin
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