Text-Processing
重新解釋終端輸出
我有一個程序在終端中執行一些命令（例如
apt-get update）並儲存輸出。如何重新解釋輸出，以便刪除所有不需要的資訊？
例如，原始輸出是（這只是輸出的一小部分）：
Reading package lists... 0% Reading package lists... 0% Reading package lists... 1% Reading package lists... 6% Reading package lists... 6% Reading package lists... 26% Reading package lists... 32% Reading package lists... 32% Reading package lists... 39% Reading package lists... 39% Reading package lists... 53% Reading package lists... 65% Reading package lists... 65% Reading package lists... 68% Reading package lists... 68% Reading package lists... 83% Reading package lists... 84% Reading package lists... 84% Reading package lists... 86% Reading package lists... 86% Reading package lists... 88% Reading package lists... 88% Reading package lists... 90% Reading package lists... 90% Reading package lists... 92% Reading package lists... 92% Reading package lists... 93% Reading package lists... 93% Reading package lists... 94% Reading package lists... 94% Reading package lists... 95% Reading package lists... 95% Reading package lists... 96% Reading package lists... 96% Reading package lists... 97% Reading package lists... 97% Reading package lists... 98% Reading package lists... 98% Reading package lists... 99% Reading package lists... 99% Reading package lists... 99% Reading package lists... 99% Reading package lists... Done它應該被解釋為當你在 bash 中執行普通命令時，作為最終輸出：
Reading package lists... Done
使用
col -b（在 Linux 上它是 util-linux 包的一部分；在其他地方的基本系統中）。col 過濾掉反向（和半反向）換行符，因此輸出順序正確，只有正向和半正向換行符。
您將命令的輸出記錄到終端，因此它決定使用終端功能。具體來說，
apt-get使用輸入符將游標移回目前行的開頭並覆蓋該行上的文本。要模擬輸入的效果，請刪除前面的所有文本：
<transcript sed 's/.*\r//'如果您只想記錄輸出而不將其顯示給使用者，請使用重定向而不是
script等。然後apt-get將顯示純文字。