多个github帐号的SSH key切换

Multiple SSH Keys settings for different github account

create different public key

create different ssh key according the article Mac Set-Up Git

$ ssh-keygen -t rsa -C "your_email@youremail.com"

Please refer to github ssh issues for common problems.

for example, 2 keys created at:

~/.ssh/id_rsa_activehacker
~/.ssh/id_rsa_raomingchao

then, add these two keys as following

$ ssh-add ~/.ssh/id_rsa_activehacker
$ ssh-add ~/.ssh/id_rsa_raomingchao

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
$ subl -a config

Then added

#activehacker account
Host github.com-activehacker
    HostName github.com
    User git
    IdentityFile ~/.ssh/id_rsa_activehacker

#raomingchao account
Host github.com-raomingchao
    HostName github.com
    User git
    IdentityFile ~/.ssh/id_rsa_raomingchao

Clone you repo and modify your Git config

clone your repo
git clone git@github.com:activehacker/gfs.git gfs_raomingchao

cd gfs_raomingchao and modify git config

$ git config user.name "raomingchao"
$ git config user.email "raomingchao@gmail.com" 

$ git config user.name "activehacker"
$ git config user.email "jexlab@gmail.com" 

or you can have global git config
$ git config —global user.name “raomingchao”
$ git config —global user.email “raomingchao@gmail.com”

then use normal flow to push your code

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

Another related article in stackoverflow

Even if the user and host are the same, they can still be distinguished in ~/.ssh/config. For example, if your configuration looks like this:

Host gitolite-as-alice
  HostName git.company.com
  User git
  IdentityFile /home/whoever/.ssh/id_rsa.alice
  IdentitiesOnly yes

Host gitolite-as-bob
  HostName git.company.com
  User git
  IdentityFile /home/whoever/.ssh/id_dsa.bob
  IdentitiesOnly yes

Then you just use gitolite-as-alice and gitolite-as-bob instead of the hostname in your URL:

git remote add alice git@gitolite-as-alice:whatever.git
git remote add bob git@gitolite-as-bob:whatever.git