## IPTraf
IPTraf is a console-based network statistics utility for Linux. It gathers a variety of figures such as TCP connection packet and byte counts, interface statistics and activity indicators, TCP/UDP traffic breakdowns, and LAN station packet and byte counts.
## NTop
Ntop is a network probe that shows network usage in a way similar to what top does for processes. In interactive mode, it displays the network status on the user's terminal. In Web mode, it acts as a web server, creating a HTML dump of the network status. It sports a NetFlow/sFlow emitter/collector, a HTTP-based client interface for creating ntop-centric monitoring applications, and RRD for persistently storing traffic statistics.
## vnStat
vnStat is a console-based network traffic monitor for Linux and BSD that keeps a log of network traffic for the selected interface(
. It uses the network interface statistics provided by the kernel as information source. This means that vnStat won't actually be sniffing any traffic and also ensures light use of system resources.
## DarkStat
Captures network traffic, calculates statistics about usage, and serves reports over HTTP.
Features: Traffic graphs, reports per host, shows ports for each host; embedded web-server with deflate compression; asynchronous reverse DNS resolution using a child process.
http://dmr.ath.cx/net/darkstat
## MTR - My traceroute
MTR is a computer software which combines the functionality of the traceroute and ping programs in a single network diagnostic tool. MTR probes routers on the route path by limiting the number of hops individual packets may traverse, and listening to responses of their expiry. As mtr starts, it investigates the network connection between the host mtr runs on and a user-specified destination host. After it determines the address of each network hop between the machines, it sends a sequence ICMP ECHO requests to each one to determine the quality of the link to each machine. As it does this, it prints running statistics about each machine.