Find Number of fields in a file

To find the number of fields in a TSV file just do the following:

First calculate the number of tabs:

$ head -1 /tmp/file.txt |  egrep -o -E $'\t' | wc -l
16

The number of fields is number of tabs separating the fields + 1

16 + 1 = 17

 
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How to read ISO 8601

ISO 8601 is a format of expressing a date with timezone information. I used to get confused after looking at dates like “2014-10-07T16:11:24-07:00”. Ok so you can tell it is 7th October 2014 and 4:24 PM. The -07:00 tells us the timezone... Continue →