[s1gnp0st]

Right. There's also the sophomorically named "TRAMP" for connecting from a locally hosted emacs session to files across a wide range of protocols including ssh.

[spudlyo]

TRAMP also exhibits a wide range of performance problems. Getting it not to hang the display of the buffer list or lock up Emacs completely for minutes at a time requires a deep dive in to a decade of Stack Overflow breadcrumbs. I've done this, and I'm still not completely satisfied with the performance. I do however love the concept.

[db48x]

No, it requires only one thing: turn on persistent SSH connections. This means that new SSH connections to the same server do not actually require opening a new TCP connection, do not require negotiating new session keys, and do not require additional authentication. To turn this on, add these settings to your ~/.ssh/config file:

    ControlMaster auto
    ControlPersist yes
    ControlPath ~/.ssh/control/%C

You should also use key–based authentication so that TRAMP never has to ask for a password, but this is less important once you are using persistent connections. Add something like this to your ssh config:

    Host orod-na-thon
    Hostname 192.168.2.133
    User db48x
    IdentityFile ~/.ssh/id_ed25519_your_private_key

Now go to Emacs and open up /ssh:orod-na-thon:~/.ssh/authorized_keys. This is the TRAMP path for your authorized_keys file on the machine named orod-na-thon. It will ask you for your password. Paste in your public key (which you can get by opening up the .pub file that goes alongside the private key in ~/ssh), and save it. Now future connections to orod-na-thon will be able to authenticate automatically using this key pair, and there will be no password prompt when you open a file there.

[m463]

I had this trouble when I upgraded emacs. I'm now stuck on 27.2 because later versions broke tramp in some way, and I haven't taken the time to debug it.