awk命令查看ip连接数(代码分享)

[chengmo@localhost ~]$ awk 'BEGIN{
    while("netstat -an"|getline){
        if( $5 ~ /[1-255]/)
        {
            split($5,t1,":");
            tarr[t1[1]]++;
        }
    }
    for(k in tarr)
        {
            print k,tarr[k] | "sort -r -n -k2";
        }
};'
 

[chengmo@localhost ~]$ time awk 'BEGIN{while("netstat -an"|getline){if( $5 ~ /[1-255]/){split($5,t1,":");tarr[t1[1]]++;}}for(k in tarr){print k,tarr[k] | "sort -r -n -k2";}};' 
211.151.33.14 28
113.65.21.200 14
121.32.89.106 13
60.191.178.230 12
118.133.177.104 12
58.61.152.154 11
219.137.58.20 11
124.117.248.52 11
122.198.80.145 11
222.88.15.138 10
222.44.13.191 10
222.161.47.34 10
221.4.202.210 10
218.79.64.12 10
183.17.92.193 10
120.72.128.254 10
118.118.121.244 10
116.252.38.236 10
113.248.75.44 10

real    0m1.149s
user    0m0.032s
sys     0m1.055s