1、Linux挂载Winodws共享文件夹  

mount -t cifs -o username=name,password=123 //172.16.3.56/d /guaizai

2、查看http的并发请求数及其TCP连接状态：

netstat -an | awk ‘/^tcp/{s[$NF]++}END{for (a in s)print a,s[a]}‘

3、用tcpdump嗅探80端口的访问看看谁最高

tcpdump -i eth0 -tnn dst port 80 -c 100 | awk -F"." ‘{print $1"."$2"."$3"."$4}‘ | sort | uniq -c |

4、查看当前系统每IP连接数

netstat -an | awk -F"[ :]+" ‘{s[$6]++}END{for (a in s) print s[a],a}‘ | sort -nr | head

5、shell下32位随机密码生成

head /dev/urandom | md5sum | head -c 30

6、统计出apache的access.log中访问量最多的5个IP

awk ‘{s[$1]++}END{for (a in s)print a,s[a]}‘ access.log | sort -nr

7、找出TMP目录中已txt结尾！并将重命名为*.sh

#!/bin/bash
str=`find /tmp/ -name \*.txt`
    for i in $str
    do
        mv $i ${i%txt}sh
    done

8、查看ssh恶意链接
cat /var/log/secure | grep "Failed password" | egrep -o "([0-9]{1,3}\.){3}[0-9]" | sort -nr | uniq -c

9、查看用root登陆失败的ip
cat /var/log/secure |grep " Failed password for root"| egrep -o "([0-9]{1,3}\.){3}[0-9]"| sort -nr | uniq -

10、通过pid查看进程路径

ll /proc/pid

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linux 常用命令。。。持续更新