![]() Make sure you go through the command line man pages of these commands to learn in-depth about more options. Individuals and organizations can also share information over the Tor network with '.onion hidden services' without compromising their privacy. In this article, we described three commands that can be used to monitor and check the network load in Linux. The Tor network is a group of volunteer-operated servers that allows you to connect for free and improve your privacy and security on the Internet. $ sar -n DEV 2 5Ĭheck the load for other protocols such as TCP. Here, -n signifies that we are calling sar for network statistics and the ‘ Protocol’ can be IP, TCP, UDP, DEV (which shows traffic for each network interface like Ethernet or Wifi), etc. Tcpdump was congured to capture only the rst 150 bytes of a packet using the snap length option (-s). The syntax to display network traffic with sar is: $ sar -n Protocol Interval Repetitions In order to gather statistics about trac leaving the network, we ran tcpdump on the same physical machine as our Tor router. In RedHat, Fedora, and other derivatives, run: $ yum install sysstatĪfter you have installed the command, run the following to enable the command to capture statistics. To install sar command in Debian, Ubuntu or other derivatives use: $ sudo apt install sysstat ![]() Check Linux Network Resource Usage with Sar CommandĪnother command which is very handy not only for network administration but also for overall system administration is the sar command, which is used for finding any kind of resource usage. Notice that it shows the packets by each protocol ( TCP, UDP), and at the top shows the summary of connections established, closed, etc. Over 2 million users access the Tor platform daily. The TCP section will also show a summary of connections and packet transfers for UDP. This is a shortened output displayed in the screenshot below. A bridge, a normal relay, an entry guard relay, etc., they all. Tor servers report different statistics depending on their conguration. The term client is used for Tor instances simply connecting to the network. ![]() netstat gives the output in more depth, while ss gives a summary of the load. 2Here and in the following Tor server refers to relays and bridges and other parts of the Tor network fullling a server role. ![]() To get the network load overview, you can call both netstat and ss with the flag -s. On RedHat and its derived distributions, run: $ yum install net-tools ![]()
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