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awk 与shell 查看ip连接数

在现网应用中,尤其是web服务器上经常会遇到需要查看主机IP连接数的情况,而我常用的语句如下: 1# 统计所有 2netstat -an|awk '{if( $5 ~ /[1-255]/)print $5}' |awk -F: '{print $1}'|sort|uniq -c|sort -nr 3# 只统计ESTABLISHED状态的 4netstat -an|grep ESTAB|awk '{print $5}' |awk -F: '{print $1}'|sort|uniq -c|sort -nr 今天网上看到了另一个使用awk处理的脚本,号称速度更快。具体脚本如下: 1# awk 'BEGIN{ 2 while("netstat -an"|getline){ 3 if( $5 ~ /[1-255]/)……

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linux下按文件大小排序

日常维护中经常遇到磁盘空间告警的问题需要查看具体是那一个或多个文件占用的空间过大,再根据具体情况决定是否需要转移或删除。当然该问题可以通过find指令找出所有超出某大小的所有文件。除了find ,我们还可以使用ls、sort等常用命令快速便捷的确认具体是哪些文件占用光了磁盘。 一、l……

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