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原理同Github类似 ​

同样使用ssh-keygen，本地存储私钥，云端存储公钥。

  1. Github是粘贴公钥信息
  2. Ubuntu是把公钥放在authorized_keys文件中
sh
scp -p ~/.ssh/id_rsa.pub root@:/root/.ssh/authorized_keys
scp -p ~/.ssh/id_rsa.pub root@:/root/.ssh/authorized_keys

其他配置文件修改（可选） ​

这部分不用看，直接看GIthub多端登录那篇文章即可！

  1. /etc/ssh/xxx
  2. ~/.ssh/id_rsa_gitlab，~/.ssh/id_rsa_gitlab.pub，config

配置自己的config

sh
## START GITPOD INTEGRATION
## This section is managed by Gitpod. Any manual changes will be lost.
Include "code_gitpod.d/config"
## END GITPOD INTEGRATION

# Default Github account
Host ssup.cc
  HostName ssup.cc
  IdentityFile ~/ssh_bt.pem
  User ubuntu

Host github.com
  HostName github.com
  User git
  IdentityFile ~/.ssh/id_rsa_github

# New Github account
Host github-new
  HostName github.com
  User git
  IdentityFile ~/.ssh/id_rsa_gitlab
## START GITPOD INTEGRATION
## This section is managed by Gitpod. Any manual changes will be lost.
Include "code_gitpod.d/config"
## END GITPOD INTEGRATION

# Default Github account
Host ssup.cc
  HostName ssup.cc
  IdentityFile ~/ssh_bt.pem
  User ubuntu

Host github.com
  HostName github.com
  User git
  IdentityFile ~/.ssh/id_rsa_github

# New Github account
Host github-new
  HostName github.com
  User git
  IdentityFile ~/.ssh/id_rsa_gitlab

和GIthub配置是一样的，不会写config配置，可以参考/etc/ssh/xxx下面的配置来修改。

conf
#	$OpenBSD: ssh_config,v 1.35 2020/07/17 03:43:42 dtucker Exp $

# This is the ssh client system-wide configuration file.  See
# ssh_config(5) for more information.  This file provides defaults for
# users, and the values can be changed in per-user configuration files
# or on the command line.

# Configuration data is parsed as follows:
#  1. command line options
#  2. user-specific file
#  3. system-wide file
# Any configuration value is only changed the first time it is set.
# Thus, host-specific definitions should be at the beginning of the
# configuration file, and defaults at the end.

# This Include directive is not part of the default ssh_config shipped with
# OpenSSH. Options set in the included configuration files generally override
# those that follow.  The defaults only apply to options that have not been
# explicitly set.  Options that appear multiple times keep the first value set,
# unless they are a multivalue option such as IdentityFile.
Include /etc/ssh/ssh_config.d/*

# Site-wide defaults for some commonly used options.  For a comprehensive
# list of available options, their meanings and defaults, please see the
# ssh_config(5) man page.

# Host *
#   ForwardAgent no
#   ForwardX11 no
#   PasswordAuthentication yes
#   HostbasedAuthentication no
#   GSSAPIAuthentication no
#   GSSAPIDelegateCredentials no
#   BatchMode no
#   CheckHostIP yes
#   AddressFamily any
#   ConnectTimeout 0
#   StrictHostKeyChecking ask
#   IdentityFile ~/.ssh/id_rsa
#   IdentityFile ~/.ssh/id_dsa
#   IdentityFile ~/.ssh/id_ecdsa
#   IdentityFile ~/.ssh/id_ed25519
#   Port 22
#   Ciphers aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,3des-cbc
#   MACs hmac-md5,hmac-sha1,umac-64@openssh.com
#   EscapeChar ~
#   Tunnel no
#   TunnelDevice any:any
#   PermitLocalCommand no
#   VisualHostKey no
#   ProxyCommand ssh -q -W %h:%p gateway.example.com
#   RekeyLimit 1G 1h
#   UserKnownHostsFile ~/.ssh/known_hosts.d/%k
Host *
    SendEnv LANG LC_*
#	$OpenBSD: ssh_config,v 1.35 2020/07/17 03:43:42 dtucker Exp $

# This is the ssh client system-wide configuration file.  See
# ssh_config(5) for more information.  This file provides defaults for
# users, and the values can be changed in per-user configuration files
# or on the command line.

# Configuration data is parsed as follows:
#  1. command line options
#  2. user-specific file
#  3. system-wide file
# Any configuration value is only changed the first time it is set.
# Thus, host-specific definitions should be at the beginning of the
# configuration file, and defaults at the end.

# This Include directive is not part of the default ssh_config shipped with
# OpenSSH. Options set in the included configuration files generally override
# those that follow.  The defaults only apply to options that have not been
# explicitly set.  Options that appear multiple times keep the first value set,
# unless they are a multivalue option such as IdentityFile.
Include /etc/ssh/ssh_config.d/*

# Site-wide defaults for some commonly used options.  For a comprehensive
# list of available options, their meanings and defaults, please see the
# ssh_config(5) man page.

# Host *
#   ForwardAgent no
#   ForwardX11 no
#   PasswordAuthentication yes
#   HostbasedAuthentication no
#   GSSAPIAuthentication no
#   GSSAPIDelegateCredentials no
#   BatchMode no
#   CheckHostIP yes
#   AddressFamily any
#   ConnectTimeout 0
#   StrictHostKeyChecking ask
#   IdentityFile ~/.ssh/id_rsa
#   IdentityFile ~/.ssh/id_dsa
#   IdentityFile ~/.ssh/id_ecdsa
#   IdentityFile ~/.ssh/id_ed25519
#   Port 22
#   Ciphers aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,3des-cbc
#   MACs hmac-md5,hmac-sha1,umac-64@openssh.com
#   EscapeChar ~
#   Tunnel no
#   TunnelDevice any:any
#   PermitLocalCommand no
#   VisualHostKey no
#   ProxyCommand ssh -q -W %h:%p gateway.example.com
#   RekeyLimit 1G 1h
#   UserKnownHostsFile ~/.ssh/known_hosts.d/%k
Host *
    SendEnv LANG LC_*