5/9/2023 0 Comments Network htopPer transmission, you’ll see a black bar that highlights the connection. The columns on the right show the data transfer rates for the last 2, 10, and 40 seconds, respectively. The columns show the source and destination of the connection along with the values for a successful data transfer. ![]() A small arrow shows the direction: => is the send direction and <= is the receive direction. The first line is the send and the second line is the receive. The active network connections are displayed in two lines with five columns in each. Iftop evaluates the data from the first external network interface it detects, unless instructed otherwise (more on this later). Because the program requires administrator rights, you must be root or start it with sudo.Īfter startup, iftop appears in three parts: at the upper edge is the data rate scale, in the middle the active network connections, and data transfer volume statistic on the bottom (Figure 1). Start iftop in the terminal with the iftop command. Thus, iftop is especially good at troubleshooting why a line seems particularly slow. Alternatively, iftop shows the connection on the protocol level, for example, all FTP or HTTP traffic. ![]() The program shows the network connections between two IP addresses and how many data packets traverse the link. ![]() ![]() With iftop, you can find out why bandwidth is being eaten up on a network interface. Iftop is not usually part of the standard installation, however. The program shows network usage, whereas top and htop show the current CPU load. Iftop (interface top) should be a part of every Linux user’s toolbox.
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