Tag UNIX

May 24, 2014

Capturing whole packet with tcpdump for analysis with wireshark

Capturing the hole packet on your NIC for later analysis with wireshark $tcpdump -nnvvXSs 1514 -i em0 -w /tmp/em0.dumptcp Will capture 1514 bytes of all packets on interface “em0” and dump it to the file “/tmp/em0.dumptcp”. You can then import the file into wireshark for analysis. Explanation of Parameters Text below is copied from tcpdump man page -nn Don’t convert protocol and port numbers etc. to names either. -vv Even more verbose output.

December 14, 2011

List all mass storage devices with FreeBSD

Get a list of installed mass storage devices with FreeBSD egrep 'ad[0-9]|da[0-9]|cd[0-9]|acd[0-9]' /var/run/dmesg.boot where: ad -> IDE HDD da -> SCSI HDD cd -> IDE CD/DVD acd-> SCSI CD/DVD Here’s an example output: da0 at ciss0 bus 0 scbus0 target 0 lun 0 da0: <COMPAQ RAID 0 VOLUME OK> Fixed Direct Access SCSI-5 device da0: 135.168MB/s transfers da0: Command Queueing enabled da0: 139979MB (286677120 512 byte sectors: 255H 32S/T 35132C) da1 at ciss0 bus 0 scbus0 target 1 lun 0 da1: <COMPAQ RAID 0 VOLUME OK> Fixed Direct Access SCSI-5 device da1: 135.

December 13, 2011

FreeBSD watch network interface usage

If you want to know the current network bandwith usage on a FreeBSD host, this will help you. systat -ifstat 1 $systat -ifstat 1 /0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10 Load Average |||||| Interface Traffic Peak Total lo0 in 0.000 KB/s 0.000 KB/s 308.224 MB out 0.000 KB/s 0.000 KB/s 308.224 MB bce1 in 2.850 MB/s 2.850 MB/s 157.746 GB out 234.496 KB/s 234.496 KB/s 19.

June 19, 2011

Howto converting UNIX timestamp into readable format using bash

Howto converting UNIX timestamp into readable format using bash. date -j -f "%s" 1299452400 Mon Mar 7 00:00:00 CET 2011 Get current UNIX timestamp date -j +%s

February 24, 2011

Using MacPorts

Changing from linux to OS X? Disappointed because you can’t find all the nice tools you’ve got with ubuntu? The MacPorts port collection turns your mac OS X computer into a fully functional UNIX system. The MacPorts port collection is an archive including thousands of UNIX tools and programs usable witch your mac. All the programs are delivered in source code and the MacPorts-tools will help you to download, install and keep it up to date.