Tux-passwortloser login

Win11

ssh-keygen -t ed25519 -a 100 -C "deinname@host"

terminal immer verbunden halten:

~/.ssh/config:

Host *
   ServerAliveInterval 30
   ServerAliveCountMax 3
   ConnectTimeout 10
   BatchMode yes
   ControlMaster auto
   ControlPersist 10m

Wolfs-Mac-mini:~ wolfpeterbuchholz$ mkdir -p ~/.ssh

root@h2405883:~# ssh-keygen -t rsa Generating public/private rsa key pair. Enter file in which to save the key (/root/.ssh/id_rsa): Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /root/.ssh/id_rsa. Your public key has been saved in /root/.ssh/id_rsa.pub. The key fingerprint is: 78:f2:0d:9b:87:b8:78:40:d3:92:ec:06:5a:c7:0e:3f root@h2405883.stratoserver.net The key's randomart image is: +--[ RSA 2048]----+ | | | | | o o | | + O .. | | o O oo S | |. E = * | | . o. = o | | ... . | | ... | +-----------------+

root@h2405883:~# cat ~/.ssh/id_rsa.pub | ssh b@B 'cat >> .ssh/authorized_keys'

How to configure ssh to use it without a passwort

We will show this on an example: we want to get a ssh connection between the Client user ufe on steffis laptop to the user steffi on the ufe Server in Luebeck.

Produce a pair of keys

In order to produce the pair of keys on the Client side, you go into the directory ~/.ssh. if this does not exist, create it with the rights drwx------. than you create a private and a public key with the command

ssh-keygen -t rsa -b 2048

---

it says:

Generating public/private rsa key pair.
Enter file in which to save the key (/home/ufe/.ssh/id_rsa):

you type ENTER

Enter passphrase (empty for no passphrase):

you type ENTER (this can be dangerous, but axel wants it so...)

Your public key has been saved in /home/ufe/.ssh/id_rsa.pub.
The key fingerprint is:
ab:a2:21:41:ea:f7:76:66:fc:fa:84:cc:23:ac:f4:40 ufe@stef

---

After the generation of the keys two files are produced: one with the public (id_rsa.pub) and one with the private (id_rsa) key.

Export the public key

The public key (id_rsa.pub) must be copied on the server into the file ~/.ssh/authorized_keys. maybe you have to produce the folder .ssh first.

cat id_rsa.pub | ssh steffi@l.ufegmbh.de 'cat >>~/.ssh/authorized_keys'

Connection

ssh steffi@l.ufegmbh.de

(if this does not work without a passwort helps the option -v)

First this does not work by me. The solution was that the .ssh folder on the server has to have the rights drwx------.

--ag 18:33, 25 October 2008 (UTC) Passwort wird verlangt.

Meistens ein Problem der Permissions auf der eigenen und/oder der anderen Seite: Das Verzeichnis .ssh/ und die die Datei .ssh/authorized_keys darf nur für den Eigentümer, der auch der "angepeilte" Nutzer sein muß, schreibbar sein. Auch das Home-Verzeichnis des angepeilten Nutzers darf ausschließlich für den Eigenümer beschreibbar sein.\n\n