brain initiation

20230515104228-ssh.org

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+:PROPERTIES:
+:ID:       422e07f8-c888-460f-849e-76d451946045
+:END:
+#+title:  ssh
+#+filetags: :basics:
+
+OpenSSH (OpenBSD Secure Shell) is a set of computer programs providing encrypted communication sessions over a computer network using the Secure Shell (SSH) [[id:bd5b34ba-aa98-4808-b97b-2376aa7b8866][protocol]]. It was created as an open source alternative to the proprietary Secure Shell software suite offered by SSH Communications Security. OpenSSH is developed as part of the OpenBSD project, which is led by Theo de Raadt.  OpenSSH is occasionally confused with the similarly-named OpenSSL; however, the projects have different purposes and are developed by different teams, the similar name is drawn only from similar goals.
+
+* Install and enable on [[id:5fada795-19a3-4ba6-97c0-0b70bd728a2f][Arco-Linux]]
+SSH is a pre-installed programm
+#+begin_src bash
+  sudo systemctl enable sshd
+  sudo systemctl start sshd
+#+end_src
+For that you need [[id:673d1cb1-536b-42f1-a046-40a8937c4283][root]] priviliges ([[id:dc54334e-afa9-4a53-be91-1e90bc6bf8d0][sudo]])
+* Key generation from Master & [[id:70899526-8b7d-4976-94fc-cc07c41e550a][client]]
+#+begin_src bash
+ ssh-keygen -t rsa 4098
+ ssh <user>@<client1> mkdir -p .ssh #type "yes" & "password" for <client>
+ cat .ssh/id_rsa.pub | ssh <user>@<client> 'cat >> .ssh/authorized_keys'
+ ssh <user>@<client> "chmod 700 .ssh; chmod 640 .ssh/authorized_keys
+#+end_src
+
+NOTE: Do the same from other clients from master & from master to all clients
+
+#+begin_src bash
+  ssh <user>@<client>
+#+end_src