使用Linux将预告片添加到csv

Question

There are let's say 44 records in my csv file. I want to add the word:

TRAILER,44

In my CSV file using linux command. How to do it?

I am using wc -l myfilename.csv | cut -d' ' -f1 >> myfilename.csv wc -l myfilename.csv | cut -d' ' -f1 >> myfilename.csv for word count. I can add the word TRAILER and word count on the next line, but was wondering if I could get them on the same line.

Answer 1

awk to the rescue!

$ awk '1; END{print "TRAILER," NR}' file

print all lines and at the end print trailer with line count.

To replace the original file:

$ awk ... file > tmp && mv tmp file