Update README.md

add more syntax

README.md

@@ -5,9 +5,8 @@ A script that uses gnuplot to plot `iperf3` output in realtime.
 ## iperf3
 
 
-```
+```bash
 iperf3  -i $PINTERVAL -R -t $PTIME -f k -c $PERFHOST
-
 ```
 
 `-i` is the interval in Seconds. Can be a float like `0.1`
@@ -28,9 +27,8 @@ There exists a [list of public iperf servers](https://iperf.fr/iperf-servers.php
 
 ´iperf3` seems to buffer its `stdout`. A tool named `stdbuf` helps achieving realtime output, so the data can be piped into the next tool.
 
-```
+```bash
 stdbuf -o0 iperf3  -i $PINTERVAL -R -t $PTIME -f k -c $PERFHOST
-
 ```
 
 `-o` refers to the `STDOUT` (there is also `-i` for `STDIN` and `-e` for `STDERR`). `0` will turn buffering off. `L` would enable Line Buffering.
@@ -43,7 +41,7 @@ stdbuf -o0 iperf3  -i $PINTERVAL -R -t $PTIME -f k -c $PERFHOST
 
 iperf3 example output:
 
-```
+```bash
 iperf3 -c 192.168.2.70 -f k -t 2
 Connecting to host 192.168.2.70, port 5201
 [  5] local 192.168.2.199 port 59798 connected to 192.168.2.70 port 5201
@@ -60,7 +58,7 @@ iperf Done.
 ```
 
 
-```
+```bash
 awk '/sec/&&!/receiver/&&!/sender/ {print $7}' 
 ```
 
@@ -80,7 +78,7 @@ So this would result in
 
 `feedgnuplot`  is a wrapper that makes it simpler to feed data to `gnuplot` in real time.
 
-```
+```bash
 feedgnuplot --lines --stream --ylabel 'KBytes/sec' --xlabel 'seconds'
 ```
 
@@ -97,7 +95,6 @@ feedgnuplot --lines --stream --ylabel 'KBytes/sec' --xlabel 'seconds'
 
 ```bash
 stdbuf -o0 iperf3  -i $PINTERVAL -R -t $PTIME -f k -c $PERFHOST | stdbuf -o0 awk '/sec/&&!/receiver/&&!/sender/ {print $7}' | stdbuf -o0 feedgnuplot --lines --stream $PINTERVAL --ylabel 'Kbit/s' --xlabel  "$PINTERVAL seconds"
-
 ```