How to measure packets per second or throughput on high speed network interface

There are many traffic monitoring tools available on Linux, which can monitor/classify network traffic, and report real-time traffic statistics in fancy user interfaces. Most of these tools (e.g., ntopng, iftop) are powered by libpcap, which is a packet capture library used to monitor network traffic in user space. Despite their versatility, however, libpcap-based network monitoring […]
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How to append current date and timestamp to filename in shell script

Sometimes it is useful to include current date or timestamp information in file names, especially when files are generated on a regular basis such as monthly/daily/hourly for backup, logging and other archiving purposes. Here is how you can format current date and time, and append formatted string to a file name, in a shell script. […]
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