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ssh

generate new key pair

ssh-keygen -o

generating new SSH key pair for github for Windows & linux

ssh-keygen -t ed25519 -C "your_email@example.com"

check if agent is running

eval $(ssh-agent -s)

add identity to agent

ssh-add /home/username/.ssh/file-name

check if identity added

ssh-add -l -E sha256

test ssh connection

ssh -vvvT git@github.com

config

file path: ~/.ssh/config
file content looks like
```ssh
Host hostname1
    SSH_OPTION value
    SSH_OPTION value

Host hostname2
	SSH_OPTION value

Host *
    SSH_OPTION value
```

example:
```ssh
Host github.com
	User git
	Hostname github.com
	PreferredAuthentications publickey
	IdentityFile /home/<username>/.ssh/github-ed25519

Host github.com
	User git
	Hostname github.com
	PreferredAuthentications publickey
	IdentityFile /home/<username>/.sshgithub-ed25519-another-account
```

Problem: newly generated ssh key not working with github

link: https://stackoverflow.com/a/62842368 (actual solution)

link: https://stackoverflow.com/a/67869162 (config file values)

ssh config file path on linux: /home/[usename]/.ssh/config

ssh config file path on windows: C:\Users\\[User]\\.ssh\config

Host [git.domain.com]
User [user]
Port [number]
IdentitiesOnly=yes
PreferredAuthentications publickey
PasswordAuthentication no
IdentityFile /home/_USER_NAME_/.ssh/[name_of_PRIVATE_key_file]

ex:

Host github.com
  User git
  Port 22
  IdentitiesOnly=yes
  PreferredAuthentications publickey
  PasswordAuthentication no
  IdentityFile /home/_USER_NAME_/.ssh/github_ed25519

Try giving absolute path to IdentityFile inside config file.