Tag console
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.
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.
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.
Show all files in OS X’s finder
By default the finder in OS X does not show all the files. You can still see the files if you use a terminal and type ls -la but sometimes you may need the finder to point to a particularly file. e.g. you want to load a hidden file in to an application. To force finder to show all files, just type the following into a terminal: defaults write com.apple.Finder AppleShowAllFiles YES
screen as a minicom alternative?
for those who still use minicom to connect to a console (serial) port on a cisco (or whatever) device: i prefer “screen”, because its so easy, and for the most things it’s all you need. screen should be already pre installed with ubuntu, with osx it’s easy to install using macports. to use it, just type: screen /dev/ttyS0 9600 Where ttyS0 is your serial device and 9600 the baudrate to close the session you have to press ctrl-a k and then y (for yes)