iotop features real-time display of all disk activity and also displays the command responsible for the activity and the user behind the command just like Resource Monitor. If theres suddenly a lot of network traffic, you can fire up NetHogs and immediately see which PID is causing this. Tells how much bandwidth is being used and also what protocol (service/port) and destination the transmission is taking place to. NetHogs does not rely on a special kernel module to be loaded. 24 Answers Sorted by: 617 Here are some nice tools in the Ubuntu repositories for command line network traffic monitoring: bmon Shows multiple interfaces at once slurm Has nice colored graphs tcptrack A favorite. M_RESIDENT is what we have in physical RAM. To use iotop, open a terminal and type the following command: sudo iotop. Instead of breaking the traffic down per protocol or per subnet, like most tools do, it groups bandwidth by process. M_DRS is a sum of all memory sections not necessarily loaded into physical memory. When application asks kernel for memory (using mmap syscall) kernel creates memory section (which you can see in /proc//mmaps) but kernel doesn't have to use real physical RAM for that seciton.įirst, no data was loaded there (yet), why waste physical memory?

Htop network usage