CentOS7.5模板机配置

CentOS7.5模板机配置

标签（空格分隔）： linux学习知识整理
Mr.Wei's notes!

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关闭selinux

[root@localhost ~]# sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
[root@localhost ~]# sed -i 's/vmlinuz.*/& selinux=0/g' /boot/grub2/grub.cfg

关闭防火墙

[root@localhost ~]# systemctl disable firewalld.service
Removed symlink /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
[root@localhost ~]# systemctl disable iptables-services 
Failed to execute operation: No such file or directory

优化SSH（禁止DNS反向解析）

[root@localhost ~]# echo "UseDNS no" >> /etc/ss