How can I delete words from each line of a file us

问题:

This question already has answers here:

How to replace multiple patterns at once with sed? (8 answers)

Closed 3 years ago.

For e.g. I want to delete the second and the fourth word of each line

Before sample.txt:

Lorem ipsum dolor sit amet, consectetur adipiscing elit. 
Nulla elit dui, fermentum sed quam sed, semper auctor elit.

After sample.txt:

Lorem dolor amet, consectetur adipiscing elit.
Nulla dui, sed quam sed, semper auctor elit.

回答1:

Something like:

sed 's/\(\S\+\s\+\)\S\+\s\+\(\S\+\s\+\)\S\+\s\+\(.*\)/\1\2\3/g'

should work, if you must use sed. This script does not work if you have fewer than 4 words in the line.

回答2:

You can do this with "cut"

cut -d ' ' -f1,3,5- MY_FILE

The -d sets the delimiter to space and the -f chooses fields 1, 3 and 5+.