OpenBSD ttyplot examples

I said I will rewrite ttyplot examples to make them work on OpenBSD.

Here they are, but a small notice before:

Examples using systat will only work for 10000 seconds , or increase that -d parameter, or wrap it in an infinite loop so it restart (but don’t loop systat for one run at a time, it needs to start at least once for producing results).

The systat examples won’t work before OpenBSD 6.6, which is not yet released at the time I’m writing this, but it’ll work on a -current after 20 july 2019.

I made a change to systat so it flush output at every cycle, it was not possible to parse its output in realtime before.

Enjoy!

Examples list

ping

Replace test.example by the host you want to ping.

ping test.example | awk '/ms$/ { print substr($7,6) ; fflush }' | ttyplot -t "ping in ms"

cpu usage

vmstat 1 | awk 'NR>2 { print 100-$(NF); fflush(); }' | ttyplot -t "Cpu usage" -s 100

disk io

 systat -d 1000 -b  iostat 1 | awk '/^sd0/ && NR > 20 { print $2/1024 ; print $3/1024 ; fflush }' | ttyplot -2 -t "Disk read/write in kB/s"

load average 1 minute

{ while :; do uptime ; sleep 1 ; done } | awk '{ print substr($8,0,length($8)-1) ; fflush }' | ttyplot -t "load average 1"

load average 5 minutes

{ while :; do uptime ; sleep 1 ; done } | awk '{ print substr($9,0,length($9)-1) ; fflush }' | ttyplot -t "load average 5"

load average 15 minutes

{ while :; do uptime ; sleep 1 ; done } | awk '{ print $10 ; fflush }' | ttyplot -t "load average 15"

wifi signal strengh

Replace iwm0 by your interface name.

{ while :; do ifconfig iwm0 | tr ' ' '\n' ; sleep 1 ; done } | awk '/%$/ { print ; fflush }' | ttyplot -t "Wifi strength in %" -s 100

cpu temperature

{ while :; do sysctl -n hw.sensors.cpu0.temp0 ; sleep 1 ; done } | awk '{ print $1 ; fflush }' | ttyplot -t "CPU temperature in °C"

pf state searches rate

systat -d 10000 -b pf 1 | awk '/state searches/ { print $4 ; fflush }' | ttyplot -t "PF state searches per second"

pf state insertions rate

systat -d 10000 -b pf 1 | awk '/state inserts/ { print $4 ; fflush }' | ttyplot -t "PF state searches per second"

network bandwidth

Replace trunk0 by your interface. This is the same command as in my previous article.

netstat -b -w 1 -I trunk0 | awk 'NR>3 { print $1/1024; print $2/1024; fflush }' | ttyplot -2 -t "IN/OUT Bandwidth in KB/s" -u "KB/s" -c "#"

Tip

You can easily use those examples over ssh for gathering data, and leave the plot locally as in the following example:

ssh remote_server "netstat -b -w 1 -I trunk0" | awk 'NR>3 { print $1/1024; print $2/1024; fflush }' | ttyplot -2 -t "IN/OUT Bandwidth in KB/s" -u "KB/s" -c "#"

or

ssh remote_server "ping test.example" | awk '/ms$/ { print substr($7,6) ; fflush }' | ttyplot -t "ping in ms"