ubuntu18.04

Posted 2021-03-13 liujunjun

网卡配置

liujunjun@liujunjun-virtual-machine:~$ sudo cat /etc/network/interfaces
[sudo] liujunjun 的密码： 
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

auto ens33
iface ens33 inet static
address 192.168.1.235
netmask 255.255.255.0
gateway 192.168.1.1

liujunjun@liujunjun-virtual-machine:~$ 

配置DNS

liujunjun@liujunjun-virtual-machine:~$ cat /etc/systemd/resolved.conf 
#  This file is part of systemd.
#
#  systemd is free software; you can redistribute it and/or modify it
#  under the terms of the GNU Lesser General Public License as published by
#  the Free Software Foundation; either version 2.1 of the License, or
#  (at your option) any later version.
#
# Entries in this file show the compile time defaults.
# You can change settings by editing this file.
# Defaults can be restored by simply deleting this file.
#
# See resolved.conf(5) for details

[Resolve]
DNS=114.114.114.114
DNS=8.8.8.8
#DNS=
#FallbackDNS=
#Domains=
#LLMNR=no
#MulticastDNS=no
#DNSSEC=no
#Cache=yes
#DNSStubListener=yes

网卡起动

liujunjun@liujunjun-virtual-machine:~$ /etc/init.d/network
networking       network-manager  
liujunjun@liujunjun-virtual-machine:~$ /etc/init.d/networking force-reload 
Reloading networking configuration (via systemctl): networking.service==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-units ===
重新启动“networking.service”需要认证。
Authenticating as: liujunjun,,, (liujunjun)
Password: 
==== AUTHENTICATION COMPLETE ===
.
liujunjun@liujunjun-virtual-machine:~$ /etc/init.d/networking restart
Restarting networking (via systemctl): networking.service==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-units ===
重新启动“networking.service”需要认证。 
Authenticating as: liujunjun,,, (liujunjun)
Password: 
==== AUTHENTICATION COMPLETE ===
.
liujunjun@liujunjun-virtual-machine:~$ 

如果IP地址没生效

解决方法: 
ip addr flush dev ens33
 ifdown ens33
 ifup ens33

安装SSHD服务

sudo apt-get install openssh-server
sudo apt-get install openssh-client

修改/etc/ssh/sshd_config

liujunjun@liujunjun-virtual-machine:~$ sudo cat /etc/ssh/sshd_config |grep PasswordAuthentication
PasswordAuthentication yes
# PasswordAuthentication.  Depending on your PAM configuration,
# PAM authentication, then enable this but set PasswordAuthentication

liujunjun@liujunjun-virtual-machine:~$ sudo /etc/init.d/ssh restart
Restarting ssh (via systemctl): ssh.service.

在SecureCRT sessions > properties > Connection > SSH2  取消勾选 PublicKey.

 

 关闭防火墙并开机不启动

liujunjun@liujunjun-virtual-machine:~$ sudo ufw disable 
防火墙在系统启动时自动禁用