Multiple SSH keys for different github accounts

multiple_ssh_setting.md

Multiple SSH Keys settings for different github account

create different public key

create different ssh key according the article Set-Up Git

$ ssh-keygen -t rsa -b 4096 -C "your_email@example.com"

Please refer to github ssh issues for common problems.

for example, 2 keys created at:

~/.ssh/id_rsa_usera
~/.ssh/id_rsa_userb

then, add these two keys as following

$ ssh-add ~/.ssh/id_rsa_usera
$ ssh-add ~/.ssh/id_rsa_userb

you can delete all cached keys before

$ ssh-add -D

finally, you can check your saved keys

$ ssh-add -l

Modify the ssh config

$ cd ~/.ssh/
$ touch config
$ vim config

Then added

#usera account
Host usera.github.com
HostName github.com
User git
IdentityFile ~/.ssh/id_rsa_usera

#userb account
Host userb.github.com
HostName github.com
User git
IdentityFile ~/.ssh/id_rsa_userb

Clone you repo and modify your Git config

clone your repo

git clone git@usera.github.com:usera/a_repo.git

cd repos of usera and modify git config

$ git config user.name "usera"
$ git config user.email "<usera_email>"

or you can have global git config

$ git config --global user.name "usera"
$ git config --global user.email "<usera_email>"

then use normal flow to push your code

$ git add .
$ git commit -m "your comments"
$ git push

Q & A

some errors like Could not open a connection to your authentication agent prompt in bash

run ssh-agent bash

References

• https://gist.github.com/jexchan/2351996/e873a4931584eacda354b1313a8c19dda6bc630f
• https://stackoverflow.com/a/26507643/3326749