Shell - Delete line if the line has only one column? [duplicate]-CodePudding

How do I delete the first column (string) if the line has only one string on the first column?

abc def geh
ijk
123 xyz 345
mno

Expected output

abc def geh
123 xyz 345

CodePudding user response：

A simple awk does the job without regex:

awk 'NF > 1' file

abc def geh
123 xyz 345

This will work for the cases when line has leading or trailing space or there are lines with just the white spaces.

CodePudding user response：

A lot of option are available. One of them could be this :

grep " " myfile.txt

The output corresponding of the expected result. This command filter just the line with at least one space. This works if first string have no space at end, if not this one works too :

awk 'NF > 1' myfile.txt