Axel am 15. März 2026 um 17:31 Uhr

2026-03-15T17:31:31Z

← Nächstältere Version		Version vom 15. März 2026, 19:31 Uhr
Zeile 1:		Zeile 1:
	====== Linux_notes_-_passwortloser_login ======		====== Linux_notes_-_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

	<code>		<code>

Axel: 1 Version importiert

2022-04-04T14:35:19Z

1 Version importiert

← Nächstältere Version	Version vom 4. April 2022, 16:35 Uhr
(kein Unterschied)

Maintenance script: DokuwikiExportByHoxel

2019-12-28T12:21:22Z

DokuwikiExportByHoxel

Neue Seite

====== Linux_notes_-_passwortloser_login ======

<code>
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'
</code>

====== I_UfE_Ssh_without_password ======

======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

<code>ssh-keygen -t rsa -b 2048</code>

----
it says:
<code>Generating public/private rsa key pair.
Enter file in which to save the key (/home/ufe/.ssh/id_rsa):</code>

you type ENTER

<code>Enter passphrase (empty for no passphrase):</code>

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

<code>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</code>
----

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.

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

(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------.

--[[User:Axel|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[[category:DWImport]]\n

Tux-passwortloser login - Versionsgeschichte

Axel am 15. März 2026 um 17:31 Uhr

Axel: 1 Version importiert

Maintenance script: DokuwikiExportByHoxel