SSH命令可不可以指定密码？

gotounix

如题，可不可以指定密码，省的每次要输入一次密码。

poet

指定使用 rsa 密钥认证即可，网上搜一下。

coolwinds

First log in on A as user a and generate a pair of authentication keys. Do not enter a passphrase:

a@A:~> ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/a/.ssh/id_rsa):
Created directory '/home/a/.ssh'.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/a/.ssh/id_rsa.
Your public key has been saved in /home/a/.ssh/id_rsa.pub.
The key fingerprint is:
3e:4f:05:79:3a:9f:96:7c:3b:ad:e9:58:37:bc:37:e4 a@A

Now use ssh to create a directory ~/.ssh as user b on B. (The directory may already exist, which is fine):

a@A:~> ssh b@B mkdir -p .ssh
b@B's password:

Finally append a's new public key to b@B:.ssh/authorized_keys and enter b's password one last time:

a@A:~> cat .ssh/id_rsa.pub | ssh b@B 'cat >> .ssh/authorized_keys'
b@B's password:

From now on you can log into B as b from A as a without password:

a@A:~> ssh b@B hostname
B

A note from one of our readers: Depending on your version of SSH you might also have to do the following changes:
Put the public key in .ssh/authorized_keys2 Change the permissions of .ssh to 700 Change the permissions of .ssh/authorized_keys2 to 640

bzhao123

Post by coolwinds;2129834
First log in on A as user a and generate a pair of authentication keys. Do not enter a passphrase:



Now use ssh to create a directory ~/.ssh as user b on B. (The directory may already exist, which is fine):


Finally append a's new public key to b@B:.ssh/authorized_keys and enter b's password one last time:


From now on you can log into B as b from A as a without password:


A note from one of our readers: Depending on your version of SSH you might also have to do the following changes:
Put the public key in .ssh/authorized_keys2 Change the permissions of .ssh to 700 Change the permissions of .ssh/authorized_keys2 to 640

我记得有个命令可以一步到位，作上面的事，忘记了，谁给个提示！