OpenSSH Series 7: OpenSSH with Wildcards

As you may have used bash or other shells, there is a powerful tool called wildcard which allows you to perform actions on more than one file at a time. When you want to list all files in the directory start with foo, you can use this:

1 2	ls foo* foo1 foo2 foo3

Consider that you have a bulk of machines like this(just fake hosts):

机器名	IP	端口	用户名	密钥
gg-android01-node.xx.yy.zz	48.132.144.01	22000	corvo	~/.ssh/id_rsa_test
gg-android02-node.xx.yy.zz	48.132.144.02	22000	corvo	~/.ssh/id_rsa_test
gg-android03-node.xx.yy.zz	48.132.144.03	22000	corvo	~/.ssh/id_rsa_test
gg-android04-node.xx.yy.zz	48.132.144.04	22000	corvo	~/.ssh/id_rsa_test
ms-vscode01-master.xx.yy.zz	42.188.144.01	22000	corvo	~/.ssh/id_rsa_test
ms-vscode02-master.xx.yy.zz	42.188.144.02	22000	corvo	~/.ssh/id_rsa_test
ms-vscode03-master.xx.yy.zz	42.188.144.03	22000	corvo	~/.ssh/id_rsa_test
fb-react01-teer.xx.yy.zz	59.143.138.01	22000	corvo	~/.ssh/id_rsa_test
fb-react02-teer.xx.yy.zz	59.143.138.02	22000	corvo	~/.ssh/id_rsa_test
fb-react03-teer.xx.yy.zz	59.143.138.03	22000	corvo	~/.ssh/id_rsa_test

When you want to put them in ssh_config, it seems that you have to write the configuration this way, using a separate configuration for each host.

Host android01
    User corvo
    HostName gg-android01-node.xx.yy.zz
    Port 22000
    IdentityFile ~/.ssh/id_rsa_test

Host android02
    User corvo
    HostName gg-android02-node.xx.yy.zz
    Port 22000
    IdentityFile ~/.ssh/id_rsa_test

...

It’s not an elegant way, This configuration is full of duplicates of the same user and the same port: Here is a beautiful style:

Host gg-* ms-* fb-*
    User corvo
    Port 22000
    IdentityFile ~/.ssh/id_rsa_test

Now you can log in to your host directly with ssh.

1	~ ❤ ssh fb-react03-teer.xx.yy.zz