2020-07-06_第四周

第四周作业_20200629

 1、统计出/etc/passwd文件中其默认shell为非/sbin/nologin的用户个数,并将用户都显示出来

 cat /etc/passwd | grep -v "sbin/nologin" | wc -l cat /etc/passwd | grep -v "sbin/nologin" | cut -d: -f1

 2、查出用户UID最大值的用户名、UID及shell类型

cat /etc/passwd | sort -t: -k3 -n | tail -1 | cut -d: -f1,3,7

3、统计当前连接本机的每个远程主机IP的连接数,并按照从大到小排序

netstat -tn | grep "ESTABLISHED" | tr -s " " : | cut -d: -f4 | sort | uniq -c| sort -nr

4、编写脚本createuser.sh, 实现如下功能: 使用一个用户名作为参数,如果指定参数的用户存在,就显示其存在,否则添加之,显示添加的用户的id号等信息

[ $# -eq 0] && { echo "Please type the username " ; exit 2; }

id $1 &> /dev/null

if [ $? -eq 0 ] ; then

       echo "$1 has exist."

else 

       useradd $1 &> /dev/null && id $1

 fi

5、编写生成脚本基本格式的脚本,包括作者,联系方式,版本,时间,描述等

cat >> ~/.vimrc << EOF

set ignorecase

set cursorline

set autoindent

autocmd BufNewFile *.sh exec ":call SetTitle()"

func SetTitle()

            if expand("%:e") == 'sh'

            call setline(1,"#!/bin/bash")

            call setline(2,"#:)

            call setline(3,"#************************************************************************************")

            call setline(4,"#Author: lili")

            call setline(5,"#QQ: 67557775")

            call setline(6,"#Date: ".strftime("%Y-%m-%d"))

            call setline(7,"#FileName: ".expand("%"))

            call setline(8,"#URL: https://www.jianshu.com/u/47e8a5eb702b"

            call setline(9,"#Description: The test script")

            call setline(10,"#Copyright (C): ".strftime("%Y")." All right reserved")

             call setline(11,"#************************************************************************************")

              call setline(12," ")

               end if

endfunc

autocmd BufNewFile * normal G

你可能感兴趣的:(2020-07-06_第四周)