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ssh

安装

shell> apt-get install openssh-server

允许 root 用户登陆

shell> vim /etc/ssh/sshd_config
PermitRootLogin yes
shell> service sshd restart

本机生成密钥

shell> ssh-keygen

本机免密登录远程服务器

a@A:~> cat .ssh/id_rsa.pub
b@B:~> mdir ~/.ssh
b@B:~> chmod 700 ~/.ssh
b@B:~> vim ~/.ssh/authorized_keys
b@B:~> chmod 600 ~/.ssh/authorized_keys

管理多个密钥

shell> ssh-keygen -t rsa -C "github.com" -f ~/.ssh/id_rsa_github
shell> ssh-keygen -t rsa -C "gitlab.com" -f ~/.ssh/id_rsa_gitlab
shell> vim ~/.ssh/config
# github
Host github.com
HostName github.com
PreferredAuthentications publickey
IdentityFile ~/.ssh/id_rsa_github

# gitlab
Host gitlab.com
HostName gitlab.com
PreferredAuthentications publickey
IdentityFile ~/.ssh/id_rsa_gitlab
shell> chmod 600 ~/.ssh/config
shell> ssh -T [email protected]
shell> ssh -T [email protected]

使用私钥重新生成公钥

shell> ssh-keygen -y -f ~/.ssh/id_rsa > ~/.ssh/id_rsa.pub

避免 Are you sure you want to continue connecting (yes/no)

shell> vim /etc/ssh/ssh_config
StrictHostKeyChecking no

参考文献

防止自动断开

shell> vim /etc/ssh/sshd_config
ClientAliveInterval 30
ClientAliveCountMax 86400

shell> service sshd restart

pssh

安装

shell> wget https://github.com/lilydjwg/pssh/archive/v2.3.1.tar.gz
shell> tar -zxvf v2.3.1.tar.gz
shell> cd pssh-2.3.1/
shell> python setup.py install

对远程服务器执行命令，前提是当前用户能免密登录远程服务器，而且 suhua 用户有权限执行该命令

shell> pssh -H [email protected]:22 -i 'sudo /etc/init.d/php7.2-fpm restart'

以上的简化版本

suhua@ubuntu~> pssh -H 192.168.1.100 -i 'sudo /etc/init.d/php7.2-fpm restart'

在多台服务器上执行命令

suhua@ubuntu~> pssh -H 192.168.1.100 -H 192.168.1.101:25680 -i 'sudo /etc/init.d/php7.2-fpm restart'

将主机写到文件中，语法为 用户名@主机ip:端口

shell> vim hosts
192.168.1.100:22
192.168.1.101:25680
suhua@ubuntu~> pssh -h hosts -i "sudo /etc/init.d/php7.2-fpm restart"