Removing last blank line

Question

There is a para break at the end of my .csv file. I tried to remove the blank line that is at the end of the file using the following command.

sed -i \'/^$/d\' c         


        

Answer 1

Found this ages ago somewhere and saved the snippet. Do not ask me how it works:

perl -i -pe "chomp if eof" combined.csv

Answer 2

If you know for sure that last line is empty, then just use: ...| head -n -1 | ...

Answer 3

To remove blank lines you can use grep . or sed '/^$/d'

It will remove any blank line in the file. I hope you file does not have any blank lines in the middle but this will work in your case.

cat combined.csv | grep .

or

cat combined.csv | sed '/^$/d'

Answer 4

Try ${/^$/d;} this will only match an empty line if it is the last line of the file.

Update: for your second question, just remove the 1 before the s, i.e.: sed -i 's/^[^0-9]*//' combined.csv

Answer 5

Try ${/^$/d;} this will only match an empty line if it is the last line of the file.

I tried it with sed (GNU sed) 4.2.2 and got all blank lines deleted not only the empty line if it is the last line of the file.

I found the following Command, that worked for myself that does the Job.

sed -e :a -e '/^\n*$/{$d;N;ba' -e '}'

This Command is from a Collection of useful SED-Oneliners: http://sed.sourceforge.net/sed1line.txt