- cpu_perc (cpu usage in percent) [argument: NULL]
- datetime (date and time) [argument: format]
- disk_perc (disk usage in percent) [argument: mountpoint]
+- entropy (available entropy) [argument: NULL]
+- hostname [argument: NULL]
+- ip (ip address) [argument: interface]
- ram_perc (ram usage in percent) [argument: NULL]
- temp (temperature in degrees) [argument: temperature file]
- vol_perc (alsa volume and mute status in percent) [argument: soundcard]