Tag ubuntu

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.

July 24, 2011

Howto: apt-cacher with ubuntu

If you have an office with loads of linux computers, it might be useful to have a local repository to save bandwidth on you local wan. But a local repository needs to be up-to-date and it’s hard to decide which packages should be mirrored. If you want to have a good and useful mirror you’ll probably waste a lot of hard drive space and also a lot of your wan bandwidth updating never used packages.

March 3, 2011

Which Ubuntu version is installed?

If you are just interessted in the Ubuntu version then type lsb_release -a gives you an output like this: No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 10.04.2 LTS Release: 10.04 Codename: lucid If you like to now the kernel version then type uname -a Linux myhostname 2.6.32-29-generic #58-Ubuntu \ SMP Fri Feb 11 19:00:09 UTC 2011 i686 GNU/Linux