Hi Hiep, The [-n repeats] means that pcapscan can (optionally) be told to repeat its scan a number of times. You can run it like this: $ pcapscan –n 10 patterns.txt data.pcap This will compile the patterns given in patterns.txt, then use them to scan the data in data.pcap, repeating the scan 10 times. The data.pcap file must contain captured network traffic in PCAP format, and the patterns in patterns.txt must be formatted like this: 1:/foo.*bar/s 2:/(abc|def)/ … etc. After scanning, the tool will display some simple performance results. Regards, Justin From: Hyperscan [mailto:hyperscan-bounces@lists.01.org] On Behalf Of Hiep Pham Sent: Saturday, October 29, 2016 9:59 PM To: hyperscan(a)lists.01.org Subject: [Hyperscan] pcapscan Hi sir I don't know how to run pcapscan example. Can you give me a example about it? i ran it but i don't know [n repeats]. Thank you Hiep -- Hanoi University Of Science And Technology , School of Information and Technology, KDE Laboratory, Pham Tuan Hiep, phone: (+84) 918632952