Shulou(Shulou.com)06/03 Report--

1. Overview

Ssh is a network communication protocol used for encrypted login between computers. Generally, there are two ways to connect to the server with ssh: password authentication and key authentication.

Password authentication is to log in through the traditional way of entering a password, and key authentication is to register the generated public key with the server and log in with the private key, so that you do not have to enter the password each time. It is especially suitable for lazy people like the author who can't remember passwords.

two。 Password authentication

Login with password authentication can directly use the ssh command on the terminal:

Ssh username@xxx.xxx.xxx.xxx

Username is the user name, followed by ip.

3. Key authentication (1) generates public and private keys

This step uses the ssh-keygen command to generate id_rsa and id_rsa.pub files:

Ssh-keygen-t rsa-b 4096-C "eamil"

Where email is your email address.

Then enter all the time (of course, you can also modify the parameters, such as the file names of the generated public key and private key, etc.).

(2) copy the public key to the server cd ~ / .sshssh-copy-id-I id_rsa.pub username@xxx.xxx.xxx.xxx

Notice that the public key is copied (.pub ends, not the private key id_rsa).

(3) modify local private key permissions

If the above situation occurs, according to the prompt, modify the permission of the private key as follows:

Chmod 600 id_rsa

Those who use wsl on windows should note that wsl cannot directly modify the file permissions, it needs to modify the / etc/wsl.conf file (if not, create a new one).

Vim / etc/wsl.conf

Input

[automount] enabled = trueoptions = "metadata,umask=22,fmask=11" mountFsTab = false

Exit wsl and restart.

(4) connect ssh-I ~ / .ssh/id_rsa username@xxx.xxx.xxx.xxx

If the above configuration does not appear, it can be connected.

(5) if you still need a password

First log in to the server with password authentication and modify / etc/ssh/sshd_config. (note that there is a file called ssh_config under dMagnee ssh and press tab.....)

Vim / etc/ssh/sshd_config

Find the PasswordAuthentication line.

Modify it to no.

Then restart the service:

Service ssh restart

Or

/ etc/init.d/ssh restart

Connect after restarting the service:

Ssh-I / .ssh/id_rsa username@xxx.xxx.xxx.xxx

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