## Print Power_On_Hours from smartctl 

```sh
for d in sd{a..e}; do smartctl -a /dev/$d | \
  awk -v d="$d" '/Power_On/ {print "PowerOnHours "d, int($10), "("int($10 / 24)" days)"}' ; done
```

Example output:
```
PowerOnHours sda 23050 (960 days)
PowerOnHours sdb 47183 (1965 days)
PowerOnHours sdc 32260 (1344 days)
PowerOnHours sdd 20713 (863 days)
PowerOnHours sde 46021 (1917 days)
```

## Sum containers total RAM usage

Podman:
```sh
podman stats --no-stream --format 'table {{ .Name }} {{ .AVGCPU }} {{ .MemUsage }}' | \
  awk 'NR>1 { gsub("MB",""); sum+=$3;} END{print sum,"MB";}'
```
Docker:
```sh
docker stats --no-stream --format 'table {{ .Name }} {{ .CPUPerc }} {{ .MemUsage }}' | \
  awk 'NR>1 { gsub("MB",""); sum+=$3;} END{print sum,"MB";}'
```

---

## Sum media durations (eg audiobooks)

```sh
find . -iname "*.m4b" -exec sh -c 'mediainfo --Inform="General;%Duration%" "{}"' \; | awk '{totalMS+=$0;} END {Hours=(totalMS/3600000); Minutes=((totalMS%3600000)/6000); Seconds=((totalMS%60000)/1000); Milliseconds=(totalMS % 1000); printf "%02dh %02dm %02ds\n", Hours, Minutes, Seconds}'

#prints:
145h 68m 51s
```