使用Bash删除文本文件中的列? [英] Removing columns in text file with Bash?

问题描述

我有一个要编写的脚本，用于从finger的输出中删除Idle列.

I have a to write a script that remove the Idle column from the output of finger.

>finger
Login    Name                 TTY  Idle  Login  Time   Office  Phone
Billy    Billy Howard        *con  6:55  Fri    19:03
Billy    Billy Howard         s00     5  Fri    19:11
Billy    Billy Howard         s00        Sat    00:27

我尝试用tr删除多余的空格，然后使用带有空格分隔符的cut来删除列，但是由于Idle可能没有值，所以我有时会得到错误的值，因为tr分隔了空格，因此空闲时间应为...有人知道我如何删除空闲"列吗?

I tried remove the extra spaces with tr and then using cut with a delimiter of a space to remove the column, but since Idle can have no value I sometimes get the wrong value since tr delimited the spaces were the idle time should be... Does anyone know how I can remove the Idle column?

推荐答案

此解决方案并不完美:列的位置和宽度可能会发生变化.如果它们恒定，则以下命令将通过删除包含在第34至39列的文本来解决问题:

This solution is not perfect: the column position and width might change. If they are constant, the following command will do the trick by removing text columns 34 to 39 inclusively:

finger | colrm 34 39

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