小记4

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

sed -n '/\/sbin\/nologin/p' /etc/passwd | 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 -n -t: -k3 | 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，并按从大到小排序

4、编写脚本createuser.sh，实现如下功能:使用一个用户名做为参数，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

vim createuser.sh

#!/bin/bash

read -p "Please input User Name: " name

id $name&>/dev/null && echo "user is exist" || echo "user is not exist,in creating.please waiting.."

id $name&>/dev/null || useradd $name

id $name

chmod +x createuser.sh

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

set et

set ts=4
set ignorecase

set cursorline

set autoindent

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

let $author_name = "Daichangchun"

let $author_email = "daichangchun333@163.com"

func SetTitle()

if &filetype == 'sh'

call setline(1,"\#################################")

call append(line("."),"\#File Name: ".expand("%"))

call append(line(".")+1,"\# Author: ".$author_name)

call append(line(".")+2,"\# mail: ".$author_email)

call append(line(".")+3,"\# Created Time: ".strftime("%Y_%m_%d"))

call append(line(".")+4,"\#################################")

call append(line(".")+5,"#!/bin/bash")

call append(line(".")+6,"")

else

call setline(1,"\#################################")

call append(line("."),"\#File Name: ".expand("%"))

call append(line(".")+1,"\# Author: ".$author_name)

call append(line(".")+2,"\# mail: ".$author_email)

call append(line(".")+3,"\# Created Time: ".strftime("%c"))

call append(line(".")+4,"\#################################")

call append(line(".")+5,"#!/usr/bin/python")

call append(line(".")+6,"")

endif

endfunc