Mac Developer Library Developer


This manual page is for Mac OS X version 10.9

If you are running a different version of Mac OS X, view the documentation locally:

  • In Terminal, using the man(1) command

Reading manual pages

Manual pages are intended as a quick reference for people who already understand a technology.

  • To learn how the manual is organized or to learn about command syntax, read the manual page for manpages(5).

  • For more information about this technology, look for other documentation in the Apple Developer Library.

  • For general information about writing shell scripts, read Shell Scripting Primer.

nettop(1)                 BSD General Commands Manual                nettop(1)

     nettop -- Display updated information about the network

     nettop [-nc] [-m <mode>]

     The nettop program displays a list of sockets or routes. The counts for network structures are updated
     periodically. While the program is running the following keys may be used:

     q        Quit

     Up Arrow
              Scroll up

     Down Arrow
              Scroll down

     Right Arrow
              Scroll Right

     Left Arrow
              Scroll Left

     d        Toggle delta output

     r        Redraw screen

     p        Toggle human readable numbers

     e        Expand all

     c        Collapse all

     h        Bring up the help menu

     j        Bring up the column selection menu.  In this mode you can enable/disable columns and change
              their order.

     A list of flags and their descriptions:

     -m <mode>
              Specify the mode. By default, nettop will monitor TCP and UDP sockets. The following modes are

              tcp      Only TCP sockets will be monitored

              udp      Only UDP sockets will be monitored

              route    Instead of sockets, the routing table will be monitored

     -n       Disable address to name resolution

     -c       Less intensive use of the CPU - draws less often

Darwin                         October 11, 2013                         Darwin

Reporting Problems

The way to report a problem with this manual page depends on the type of problem:

Content errors
Report errors in the content of this documentation with the feedback links below.
Bug reports
Report bugs in the functionality of the described tool or API through Bug Reporter.
Formatting problems
Report formatting mistakes in the online version of these pages with the feedback links below.