screen -S wireshark -d -m tshark -i eth0 -w mycapture -b filesize:100000 -b files:10 The capture files will be named mycapture followed by a timestamp indicating when the capture file was created. Wireshark will capture ten 100MB files and delete every tenth file. In this example, we will use screen to run Wireshark in the background. This particular example is great for snuffing out botnets and helping you determine the nature of a DDoS attack, as you never know when the attack might occur and a rolling capture will allow you to leave Wireshark running indefinitely.įirst, let's install Screen and Wireshark yum install wireshark screen -y It can help you track down pesky networking problems and confirm your suspicions regarding mischievous behaviour taking place on your network. Wireshark is an invaluable resource for any network admin. This example will create ten 100MB files and delete every tenth capture screen -S wireshark -d -m tshark -i eth0 -w mycapture -b filesize:100000 -b files:10 Solution The capture file will be located in your current directory and named mycapture*. Run your Wireshark capture in the background using Screen. Install Wireshark and Screen yum install wireshark screen -y Performing a rolling capture will allow you to manage how much disk space Wireshark uses, by writing to a series of capture files of a designated size and then deleting every Xth capture file. If you leave a Wireshark capture running, it can quickly fill up a huge portion of your disk space. How to Perform a Rolling Capture in Wireshark - Linux
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