dmzconf/setup/ssh_FAQ.md

volume	section	title	author	source
Decentrala	6	ssh setup	Malin	dmz.rs

Step 1: Basic ssh

I did stuff with my ssh and now things don't work. What do?

Check the permissions on your ssh directory:

$ ls -d ~/.ssh
drwxr-x--- - ghost  3 Dec 12:55 /home/ghost/.ssh

This is wrong, because anyone in your ~ can see you ssh configuration files.

$ chmod -R 600 ~/.ssh
$ ls -d ~/.ssh
drw------- - ghost  3 Dec 12:55 /home/ghost/.ssh

This is also wrong - entering a directory is the same as executing it. If you can't 'execute' the directory, you cannot enter it, and ssh cannot read the files.

$ chmod -R 700 ~/.ssh
$ ls -l ~/.config

-rwx------ 1 ghost dmz   578 Dec 27  2022 authorized hosts
-rwx------ 1 ghost dmz  1145 Dec 27  2022 authorized keys
-rwx------ 2 ghost dmz   366 Dec 14 18:36 config
-rwx------ 1 ghost dmz   419 Dec 11  2023 id ed25519
-rwx------ 1 ghost dmz   106 Dec 11  2023 id ed25519.pub
-rwx------ 1 ghost dmz  2610 Dec 27  2022 id rsa
-rwx------ 1 ghost dmz   578 Dec 27  2022 id rsa.pub
-rwx------ 1 ghost dmz 28269 Dec 28 17:32 known hosts

Now all the files have 'read, write, and execute', but only for $USER.

Step 2: The Config File

I have 43 different ssh keys. Something doesn't work with a program. What do?

• Option 1: Delete all of them and stop asking Santa for ssh keys.
• Option 2: Define which one you want to use in the ~/.ssh/config file.

Host soft
    HostName soft.dmz.rs
    Port 2222
	User ghost
	IdentityFile ~/.ssh/id rsa
Host dmz
    HostName dmz.rs
    Port 123
    User root
Host krov
	HostName dmz.rs
	Port 5555
	User ghost
Host june
	HostName 192.168.1.100
	User ghost
	ProxyJump krov

The first example lets you go to the soft-serve git-server just by typing

$ ssh soft

If you're not sure if ssh is using the right key, try with -v for 'verbose mode'.

$ ssh -vv soft

If you're not sure if ssh is using the right key, try with -v for 'verbose mode'.

git is not working with ssh

git will not presume to use your ssh config file unless you tell it:

$ GIT_SSH_COMMAND="ssh -F ~/.ssh/config" git pull

If that works, you can make the change permanent for that one repository:

$ git config core.sshCommand "ssh -F ~/.ssh/config"