Linux运维工具-ywtool

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一.问题描述

系统:ubuntu-18.04-desktop-amd64
系统安装完后,想要通过xshell软件连接系统,发现能Ping通系统的IP,但是无法ssh连接上去(22端口不通)

二.问题解决

原因:先安装的ubuntu系统没有openssh-server包,安装即可

2.1 先给ubuntu系统配置阿里云源

(1)首先备份源列表

sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak

(2)打开并编辑sources.list文件

sudo gedit /etc/apt/sources.list

(3)将/etc/apt/sources.list已有的内容删除

ctrl+a全选后delete删除

(4)去阿里云镜像站复制配置

deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse

(5)粘贴进/etc/apt/sources.list文件中,保存退出

如果是vmware虚拟机无法复制的话,可以在ubuntu桌面里找到浏览器,然后访问阿里云镜像站,复制再粘贴

(6)更新

sudo apt-get update

2.2 安装openssh-server软件

sudo apt install openssh-server

2.3 在尝试ssh连接,可以连接成功了

三.其他命令

(1)修复损坏的包

sudo apt-get -f install

(2)升级

sudo apt-get upgrade

(3)创建一个普通用户

sudo useradd -m vul -s /bin/bash
#创建"vul"用户并使用/bin/bash作为登陆shell
sudo passwd vul
#设置密码
sudo adduser vul sudo
#这一步看实际情况
#为"vul"用户增加管理员权限,这个权限和安装系统创建的用户权限一样
su vul
#切换为"vul"登录用户

(4)删除用户

deluser --remove-home vul
#会删除用户目录