centos 新服务器配置

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1 设置 hostname

用你的 hostname 替换 plato

echo "HOSTNAME=plato" >> /etc/sysconfig/networkhostname "plato"

2 更新 etc/hosts

127.0.0.1        localhost.localdomain    localhost12.34.56.78      plato.example.com        plato

如果 IPv6

127.0.0.1                       localhost.localdomain    localhost12.34.56.78                     plato.example.com        plato2600:3c01::a123:b456:c789:d012  plato.example.com        plato

3 更新 yum

yum update

4 添加用户替换root用户

adduser example_user

usermod -a -G sudo example_user

客户端登录

ssh example_user@123.456.78.90

登录成功后，加sudo执行命令

sudo iptables -L

sudo 日志 /var/log/auth.log.

5 ssh key 授权登录服务器

ssh-keygen

产生两个文件

~/.ssh directory: id_rsa and id_rsa.pub

上传id_rsa.pub 文件到服务器

scp ~/.ssh/id_rsa.pub example_user@123.456.78.90:.ssh/id_rsa.pub

登录服务器执行一下命令

cat .ssh/id_rsa.pub >> .ssh/authorized_keys