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#!/bin/bash

a=`netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n | grep -v '1 ' | grep -v '2 ' | grep -v '3 ' | grep -v '1.1.1.1' | grep -v '1.2.2.2' | grep -v '127.0.0.1' | grep -v '127.0.1.'`
ip=`netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n | grep -v '1 ' | grep -v '2 ' | grep -v '3 ' | grep -v '1.1.1.1' | grep -v '1.2.2.2' | grep -v '127.0.0.1' | grep -v '127.0.1.' | awk '{print$2}' | tail -1`
d=`date`
p=`ps ax | grep $IP | grep -v grep | grep -v /usr/sbin | awk '{print $1}'`
k=`kill -9 $p`
if [ -n "$a" ]
    then echo -e "file exists\n IPs copied in .../log folder" && echo -e "\n Current date: $d \n$a" >> /var/log/offendersips.log 
else 
    echo "file empty, no abuse"
fi
if [ -n "$a" ]
    then echo "$k"
else 
    echo "file empty, no abuse"
fi

我收到的错误：

Usage: grep [OPTION]... PATTERN [FILE]...
Try 'grep --help' for more information.
kill: usage: kill [-s sigspec | -n signum | -sigspec] pid | jobspec ... or kill -l [sigspec]
file exists
IPs copied in .../log folder

答案1

中的变量名bash区分大小写；您没有$IP设置变量（尽管您有一个$ip变量集）：grep $IP扩展为grep，这会导致grep错误和错误kill。

更改此行

p=`ps ax | grep $IP | grep -v grep | grep -v /usr/sbin | awk '{print $1}'`

到这个

p=`ps ax | grep $ip | grep -v grep | grep -v /usr/sbin | awk '{print $1}'`

答案2

以下是对您的 shell 脚本的静态分析：

   1  #!/bin/bash
   2  
   3  a=`netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n | grep -v '1 ' | grep -v '2 ' | grep -v '3 ' | grep -v '1.1.1.1' | grep -v '1.2.2.2' | grep -v '127.0.0.1' | grep -v '127.0.1.'`
        ^––SC2006 Use $(..) instead of legacy `..`.
   4  ip=`netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n | grep -v '1 ' | grep -v '2 ' | grep -v '3 ' | grep -v '1.1.1.1' | grep -v '1.2.2.2' | grep -v '127.0.0.1' | grep -v '127.0.1.' | awk '{print$2}' | tail -1`
      ^––SC2034 ip appears unused. Verify it or export it.
         ^––SC2006 Use $(..) instead of legacy `..`.
   5  d=`date`
        ^––SC2006 Use $(..) instead of legacy `..`.
   6  p=`ps ax | grep $IP | grep -v grep | grep -v /usr/sbin | awk '{print $1}'`
        ^––SC2006 Use $(..) instead of legacy `..`.
         ^––SC2009 Consider using pgrep instead of grepping ps output.
                      ^––SC2086 Double quote to prevent globbing and word splitting.
   7  k=`kill -9 $p`
        ^––SC2006 Use $(..) instead of legacy `..`.
                 ^––SC2086 Double quote to prevent globbing and word splitting.
   8  if [ -n "$a" ]
   9      then echo -e "file exists\n IPs copied in .../log folder" && echo -e "\n Current date: $d \n$a" >> /var/log/offendersips.log 
  10  else 
  11      echo "file empty, no abuse"
  12  fi
  13  if [ -n "$a" ]
  14      then echo "$k"
  15  else 
  16      echo "file empty, no abuse"
  17  fi

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