there is no "-H" option for RedHat EL6

almedinvisionary commented 5 years ago

I need to run the following command to create a list of IP addresses connected to the server, along with their total number of connections. ss -Hntu | awk '{print $6}' | sort | uniq -c | sort -nr

We receive the following error:

ss: invalid option -- 'H'
Usage: ss [ OPTIONS ]
       ss [ OPTIONS ] [ FILTER ]
   -h, --help           this message
   -V, --version        output version information
   -n, --numeric        don't resolve service names
   -r, --resolve       resolve host names
   -a, --all            display all sockets
   -l, --listening      display listening sockets
   -o, --options       show timer information
   -e, --extended      show detailed socket information
   -m, --memory        show socket memory usage
   -p, --processes      show process using socket
   -i, --info           show internal TCP information
   -s, --summary        show socket usage summary

   -4, --ipv4          display only IP version 4 sockets
   -6, --ipv6          display only IP version 6 sockets
   -0, --packet display PACKET sockets
   -t, --tcp            display only TCP sockets
   -u, --udp            display only UDP sockets
   -d, --dccp           display only DCCP sockets
   -w, --raw            display only RAW sockets
   -x, --unix           display only Unix domain sockets
   -f, --family=FAMILY display sockets of type FAMILY

   -A, --query=QUERY, --socket=QUERY
       QUERY := {all|inet|tcp|udp|raw|unix|packet|netlink}[,QUERY]

   -D, --diag=FILE      Dump raw information about TCP sockets to FILE
   -F, --filter=FILE   read filter information from FILE
       FILTER := [ state TCP-STATE ] [ EXPRESSION ]

Is there a known workaround?

jgmdev commented 5 years ago

Remove the -H flag or use netstat while using head to skip the output heading.

jgmdev commented 5 years ago

Fixed by pull request #58

jgmdev / ddos-deflate

there is no "-H" option for RedHat EL6 #57