Update README.

Author: dkorunic

README.md

@@ -60,17 +60,21 @@ FLAGS
   -?, --help               display help
   -j, --json               if true, output in JSON format
   -x, --xdp                if true, use XDP instead of TC (this disables egress statistics)
-  -k, --kprobes            if true, use kprobes for per-proces TCP/UDP statistics
+  -k, --kprobes            if true, use KProbes for per-proces TCP/UDP statistics
+  -g, --tui                if true, enable TUI
       --version            display program version
   -i, --iface STRING       interface to read from (default: eth0)
       --xdp_mode STRING    XDP attach mode (auto, generic, native or offload; native and offload require NIC driver support) (default: auto)
-  -t, --timeout DURATION   timeout for packet capture (default: 1h0m0s)
+  -r, --refresh DURATION   refresh interval in TUI (default: 1s)
+  -t, --timeout DURATION   timeout for packet capture in CLI (default: 10m0s)
 ```
 
 It is possible to specify interface with `--iface`.
 
 Timeout `--timeout` will stop execution after a specified time, but it is also possible to interrupt program with Ctrl C, SIGTERM or SIGINT.
 
+With `--tui` program will switch to a very simple TUI primarily for continous monitoring purpose. Use arrow keys to browse statistics table and keys 'q' or 'x' to exit.
+
 With `--json` it is possible to get traffic statistics in JSON format.
 
 With `--xdp` program will switch from TC eBPF mode to XDP eBPF mode, working in even more high-performance mode however this will disable all egress statistics. On program exit it is also possible to get an interface reset, so it is best to use this program inside of [screen](https://www.gnu.org/software/screen/) or [tmux](https://github.com/tmux/tmux).