% weather

# Show weather info for current location
curl -s "wttr.in" \
   | grep -v "New feature" \
   | grep -v Follow

# Show weather info for a specific location
curl -s "wttr.in/<location>" \
   | grep -v "New feature" \
   | grep -v Follow



% qr code

# Create a QR code with some content
echo <content> | curl -F-=\<- qrenco.de



% json

# convert JSON to YAML
cat <json_file> | ruby -ryaml -rjson -e 'puts YAML.dump(JSON.load(ARGF))'

$ json_file: find . -name '*.json'