VPS User Configuration for Ubuntu

Use of chmod

chmod (option) (parameter)

Options:

-C or--changes: The effect is similar to the "-V" parameter, but returns only the part of the change;

-F or--quiet or--silent: No error message is displayed;

-R or--recursive: recursive processing, all files and subdirectories under the instruction directory are processed together;

-V or--verbose: Displays the instruction execution process;

Parameters:

Permission mode: Specifies the permission mode of the file, 3-bit represents the user rights of the owning group, the other person's rwx permission

File: The file to change permissions for.

such as: Chmod-r Mydir

Ubuntu User Management

#创建用户:

Useradd MyUser

#修改密码:

passwd MyUser

#建立文件夹:

Mkdir/home/myuser

#设置文件夹权限:

Chmod-r 700/home/myuser

#修改shell为bash:

Usermod-s/bin/bash MyUser

#设置文件夹所有者:

Chown-r Myuser:myuser/home/myuser

#添加用户到sudo:

Usermod-ag sudo myuser

Installing Fail2ban Software

This software will use the Iptables firewall, will attempt to blast the SSH password IP blocking, the default of 10 minutes, so as to effectively prevent attacks.

Apt-get Install Fail2ban

Login shell with Public key

Vim/home/myuser/.ssh/authorized_keys

#或者

Cat Mypublickey.pub >> Authorized_keys

chmod 400/home/myuser/.ssh/authorized_keys

Use of the UFW firewall

#安装:

sudo apt-get install UFW

UFW Allow SSH

UFW Allow HTTP

UFW Allow HTTPS

You can also use the port to open

UFW Allow 53

Be sure to open the SSH port, if you are not the standard port, please remember to open, otherwise the consequences!

UFW Enable

Two-factor authentication

On the left side of the control panel of the bricklayer is

Installing Apache

sudo apt-get install apache2

Sudo/etc/init.d/apache2 restart

Just put the designed HTML file into the/var/www directory

Modifying the default folder will have permissions issues and is not recommended to modify

VPS User Configuration for Ubuntu