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话题1：linux系统最小化安装常用命令

Centos7,8系统最小化安装常用命令如下：

yum install  vim iotop bc gcc gcc-c++ glibc glibc-devel pcre \
pcre-devel openssl  openssl-devel zip unzip zlib-devel  net-tools \
lrzsz tree ntpdate telnet lsof tcpdump wget libevent libevent-devel \
bc  systemd-devel bash-completion traceroute -y

Ubuntu1804系统最小化安装常用命令如下：

apt  install iproute2  ntpdate  tcpdump telnet traceroute \
nfs-kernel-server nfs-common  lrzsz tree  openssl libssl-dev \
libpcre3 libpcre3-dev zlib1g-dev ntpdate  traceroute  gcc openssh-server \
lrzsz tree  openssl libssl-dev libpcre3 libpcre3-dev zlib1g-dev ntpdate tcpdump \
telnet traceroute iotop unzip zip -y

写一个脚本：实现自动判断是系统是centos，还是ubuntu，并完成上述最小化安装常用命令的过程：

 1 [root@centos7 script]# cat min_install.sh 
 2 #!/bin/bash
 3 #
 4 #********************************************************************
 5 #Author:        zouyongbing
 6 #QQ:                         273838882
 7 #Date:             2021-12-03
 8 #FileName：        min_install.sh
 9 #URL:             https://www.cnblogs.com/zouyongbing/
10 #Description：        The test script
11 #Copyright (C):     2021 All rights reserved
12 #********************************************************************
13 . /etc/os-release
14 min_install_yum(){
15 yum install  vim iotop bc gcc gcc-c++ glibc glibc-devel pcre \
16 pcre-devel openssl  openssl-devel zip unzip zlib-devel  net-tools \
17 lrzsz tree ntpdate telnet lsof tcpdump wget libevent libevent-devel \
18 bc  systemd-devel bash-completion traceroute -y
19 }
20 min_install_dnf(){
21 dnf install  vim iotop bc gcc gcc-c++ glibc glibc-devel pcre \
22 pcre-devel openssl  openssl-devel zip unzip zlib-devel  net-tools \
23 lrzsz tree ntpdate telnet lsof tcpdump wget libevent libevent-devel \
24 bc  systemd-devel bash-completion traceroute -y
25 }
26 min_install_apt(){
27 apt  install iproute2  ntpdate  tcpdump telnet traceroute \
28 nfs-kernel-server nfs-common  lrzsz tree  openssl libssl-dev \
29 libpcre3 libpcre3-dev zlib1g-dev ntpdate  traceroute  gcc openssh-server \
30 lrzsz tree  openssl libssl-dev libpcre3 libpcre3-dev zlib1g-dev ntpdate tcpdump \
31 telnet traceroute iotop unzip zip -y
32 }
33 judge_os(){
34     if [ ${VERSION_ID} == "7" ];then
35         echo "你的操作系统是centos7,下面进行安装常用软件包："
36         min_install_yum
37         echo "所有常用软件包已经安装完毕！请验证是否成功执行！！！"
38     elif [ ${VERSION_ID} == "8" ];then
39         echo "你的操作系统是centos8,下面进行安装常用软件包："
40         min_install_dnf
41         echo "所有常用软件包已经安装完毕！请验证是否成功执行！！！"
42     elif [ ${VERSION_ID} == "18.04" ];then
43         echo "你的操作系统是ubuntu1804,下面进行安装常用软件包："
44         min_install_apt
45         echo "所有常用软件包已经安装完毕！请验证是否成功执行！！！"
46     else
47         echo "不支持的操作系统，请手动安装"
48     fi
49 }
50 judge_os

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