查找大文件

https://blog.csdn.net/weixin_37391237/article/details/121450826

时区

https://blog.csdn.net/aliaichidantong/article/details/117533727
查看
timedatectl status

设定
sudo timedatectl set-timezone ‘Asia/Shanghai’

同步时间
ntpdate ntp1.aliyun.com

压缩&解压

https://blog.csdn.net/weixin_49164248/article/details/121151062
解压：
tar zxvf 压缩包
压缩：
tar zcvf name.tar.gz 目录或文件

查看端口

netstat -anp | grep ssh

创建用户

groupadd ftpuser
useradd ftpuser
加入多个用户组
usermod -G 用户组1,用户组2,用户组3 用户名

查看用户uid、gid、归属用户组

id root

防火墙

systemctl status firewalld
firewall-cmd —zone=public —add-port=58110-58120/tcp —permanent
firewall-cmd —zone=public —add-port=58111/tcp —permanent
firewall-cmd —zone=public —add-port=58112/tcp —permanent
firewall-cmd —zone=public —add-port=58113/tcp —permanent
firewall-cmd —zone=public —add-port=58114/tcp —permanent
firewall-cmd —zone=public —add-port=58115/tcp —permanent
firewall-cmd —zone=public —add-port=58116/tcp —permanent
firewall-cmd —zone=public —add-port=58117/tcp —permanent
firewall-cmd —zone=public —add-port=58118/tcp —permanent
firewall-cmd —zone=public —add-port=58119/tcp —permanent
firewall-cmd —zone=public —add-port=58120/tcp —permanent
firewall-cmd —zone=public —add-port=11600/tcp —permanent
firewall-cmd —zone=public —add-port=18011/tcp —permanent
firewall-cmd —zone=public —add-port=16416/tcp —permanent
firewall-cmd —zone=public —add-port=11200/tcp —permanent

SELinux

如何开启或关闭SELinux，并且避免系统无法启动的问题_云服务器 ECS-阿里云