定期的に測定値を記録するようにcronジョブを設定したいと思います。ルーターに取り付けられたUSBスティック：
user@router:/tmp/home/root# uname -a
Linux ルーター 2.6.36.4brcmarm #2 SMP PREEMPT Sun Mar 20 16:06:18 EDT 2016 armv7l GNU/Linux
user@router:/tmp/home/root# curl http://THERMOSTAT/tstat/humidity >> /tmp/mnt/USBstick/CT80_data/C14HumidityData.txt
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 18 0 18 0 0 80 0 --:--:-- --:--:-- --:--:-- 83
ファイルに出力を追加（>>）すると、上記のテーブルが生成されるのはなぜですか？
以下を追加しないと、テーブルは作成されません。
curl http://THERMOSTAT/tstat/humidity
{"humidity":51.00}
テーブル応答を抑制するコマンドオプションはありますか？
ベストアンサー1
これはカールです。スケジュール。 ~からman curl
PROGRESS METER curl normally displays a progress meter during operations, indicating the amount of transferred data, transfer speeds and estimated time left, etc. The progress meter displays number of bytes and the speeds are in bytes per second. The suffixes (k, M, G, T, P) are 1024 based. For example 1k is 1024 bytes. 1M is 1048576 bytes. curl displays this data to the terminal by default, so if you invoke curl to do an operation and it is about to write data to the terminal, it dis‐ ables the progress meter as otherwise it would mess up the output mixing progress meter and response data. If you want a progress meter for HTTP POST or PUT requests, you need to redirect the response output to a file, using shell redirect (>), -o, --output or similar. It is not the same case for FTP upload as that operation does not spit out any response data to the terminal. If you prefer a progress "bar" instead of the regular meter, -#, --progress-bar is your friend. You can also disable the progress meter completely with the -s, --silent option.