LinuxQuestions.org - [SOLVED] Problem adjusting the output

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Problem adjusting the output

Hi i m running a command

Code:

watch -n 1 -d netstat -i

to see the packet drops every 1 second.
but the problem is the output is so long(Due to large number of virtual interfaces) it doesn't fit into the putty prompt.

I dont need to monitor each and every network interface I m more interested in monitoring the interfaces starting from vif but whenever i run following command it doesnt display anything.

Code:

watch -n 3 -d netstat -i | grep vif*

What should i do?

Remove grep from the command and it will work:

watch -n 3 -d netstat -i eth0

I think that you need to include vif* next to netstat. I would try something like: watch -n 3 -d 'netstat -i vif*' I looked up the man of watch (http://linux.die.net/man/1/watch) and in the examples it states: "watch -d 'ls -l | fgrep joe'" the LS is of particular interest because it is a command. So, I am willing to bet you can do it if you place your netstat command in ''.

Quote:

Originally Posted by lonesoac0 (Post 4366272)

The above command is not working as you dont have any option specifying interface name with -i option.

Code:

# netstat -i vif*

usage: netstat [-veenNcCF] [<Af>] -r        netstat {-V|--version|-h|--help}

      netstat [-vnNcaeol] [<Socket> ...]

      netstat { [-veenNac] -I[<Iface>] | [-veenNac] -i | [-cnNe] -M | -s } [delay]



        -r, --route                display routing table

        -I, --interfaces=[<Iface>] display interface table for <Iface>

        -i, --interfaces          display interface table

        -g, --groups              display multicast group memberships

        -s, --statistics          display networking statistics (like SNMP)

        -M, --masquerade          display masqueraded connections



        -v, --verbose              be verbose

        -n, --numeric              don't resolve names

        --numeric-hosts            don't resolve host names

        --numeric-ports            don't resolve port names

        --numeric-users            don't resolve user names

        -N, --symbolic            resolve hardware names

        -e, --extend              display other/more information

        -p, --programs            display PID/Program name for sockets

        -c, --continuous          continuous listing



        -l, --listening            display listening server sockets

        -a, --all, --listening    display all sockets (default: connected)

        -o, --timers              display timers

        -F, --fib                  display Forwarding Information Base (default)

        -C, --cache                display routing cache instead of FIB

        -T, --notrim              stop trimming long addresses

        -Z, --context              display SELinux security context for sockets



  <Iface>: Name of interface to monitor/list.

  <Socket>={-t|--tcp} {-u|--udp} {-S|--sctp} {-w|--raw} {-x|--unix} --ax25 --ipx --netrom

  <AF>=Use '-A <af>' or '--<af>'; default: inet

  List of possible address families (which support routing):

    inet (DARPA Internet) inet6 (IPv6) ax25 (AMPR AX.25)

    netrom (AMPR NET/ROM) ipx (Novell IPX) ddp (Appletalk DDP)

    x25 (CCITT X.25)

Did you try:

watch -n 3 -d netstat -i eth*

it worked for me... check my previous post.

Quote:

Originally Posted by T3RM1NVT0R (Post 4366266)

Remove grep from the command and it will work:

watch -n 3 -d netstat -i eth0

not valid command.

Code:

# netstat -i eth0

usage: netstat [-veenNcCF] [<Af>] -r        netstat {-V|--version|-h|--help}

      netstat [-vnNcaeol] [<Socket> ...]

      netstat { [-veenNac] -I[<Iface>] | [-veenNac] -i | [-cnNe] -M | -s } [delay]



        -r, --route                display routing table

        -I, --interfaces=[<Iface>] display interface table for <Iface>

        -i, --interfaces          display interface table

        -g, --groups              display multicast group memberships

        -s, --statistics          display networking statistics (like SNMP)

        -M, --masquerade          display masqueraded connections



        -v, --verbose              be verbose

        -n, --numeric              don't resolve names

        --numeric-hosts            don't resolve host names

        --numeric-ports            don't resolve port names

        --numeric-users            don't resolve user names

        -N, --symbolic            resolve hardware names

        -e, --extend              display other/more information

        -p, --programs            display PID/Program name for sockets

        -c, --continuous          continuous listing



        -l, --listening            display listening server sockets

        -a, --all, --listening    display all sockets (default: connected)

        -o, --timers              display timers

        -F, --fib                  display Forwarding Information Base (default)

        -C, --cache                display routing cache instead of FIB

        -T, --notrim              stop trimming long addresses

        -Z, --context              display SELinux security context for sockets



  <Iface>: Name of interface to monitor/list.

  <Socket>={-t|--tcp} {-u|--udp} {-S|--sctp} {-w|--raw} {-x|--unix} --ax25 --ipx --netrom

  <AF>=Use '-A <af>' or '--<af>'; default: inet

  List of possible address families (which support routing):

    inet (DARPA Internet) inet6 (IPv6) ax25 (AMPR AX.25)

    netrom (AMPR NET/ROM) ipx (Novell IPX) ddp (Appletalk DDP)

    x25 (CCITT X.25)

I just tried: watch -n 3 -d netstat -i eth* on Debian squeeze and it worked fine. You could try which watch and which netstat. The which command shows the exact location of the executable. You could try: /PATHWAY/TO/WATCH -n 3 -d /PATHWAY/TO/NETSTAT -i eth[0-9] The [0-9] parameter looks for the interfaces 0 through 9.

Quote:

Originally Posted by lonesoac0 (Post 4366411)

Code:

watch -n 1 -d "netstat -i | grep vif*"

This has worked for me i needed to put the command in ".