it says: Unknown command: whois
and if i try to install it (apt-get install whois) it says: E: Package ‘whois’ has no installation candidate. this may mean that tha package is missing, has been obsoleted, or is only available from another source.
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Please output the repository list of your machine;
Make sure it has the following inside;
Then clean your apt-get
Make an update
And upgrade
And finally make a dist upgrade
Then try again to install once more, hope it helps