Dear Sir or Madam,
I don't have any issue over command: ssh {myusername}@{LinuxServer} before.
But yesterday I upgraded my Mac macOS Catalina, the same command return:
ssh: Could not resolve hostname xxx: nodename nor servname provided, or not known
I checked some article, is it related to zsh?
Do you know how to fix the issue?
Thanks,
Alex
MacBook Pro
"it is like this: ssh user@server"
Is this server on your local network?
Do you have an entry for this server in /etc/hosts?
If the server is called "server" and the IP address of the server is, for example, 192.168.1.37, you need to tell your mac how to find this address. This is done by adding a line to /etc/hosts. If you are unfamiliar with this I recommend that you get someone there to assist you. You'll need to edit this file with administrator privileges, add a line such as
192.168.1.37 server
(replacing the IP and server with the actual IP and server name, of course)
and restart your mac. Then try again.
"it is like this: ssh user@server"
Is this server on your local network?
Do you have an entry for this server in /etc/hosts?
If the server is called "server" and the IP address of the server is, for example, 192.168.1.37, you need to tell your mac how to find this address. This is done by adding a line to /etc/hosts. If you are unfamiliar with this I recommend that you get someone there to assist you. You'll need to edit this file with administrator privileges, add a line such as
192.168.1.37 server
(replacing the IP and server with the actual IP and server name, of course)
and restart your mac. Then try again.
No, it is not related to zsh.
Without further details, I can only guess. It is probably a dns issue ir maybe you accidentally mistyped the server address. Maybe you used to have an entry for this server in /etc/hosts, and you need to recreate that.
Please tell us about the format you are using with the ssh command.
Is it like:
ssh user@server
or
ssh user@server.subdomain.domain
or something different?
I know that and thanks for sharing the details.
But do you know why I did not have any experience before like this and why must to add something into /etc/hosts?
Before, I was reachable for ssh the server without adding it into the file
While you have a working solution, here is another possibility:
If the server is on your local subnet, then add ".local" to your server name. This will work without having an entry in the "/etc/hosts" file or being known by the DNS server (at least for older versions of macOS).
ssh user@server.local
it is like this: ssh user@server
I don't know how you could possibly reach a server by name unless that name was either in the /etc/hosts file, or was a name known to your DNS server. Did you use a custom DNS server?
By the way, your proposal is solved my issue after adding the line into host file.
After upgrade to macOS Catalina, terminal command ssh failed