Question

I need to remove a line in a specified file if it has more than one word in it using a bash script in linux.

e.g. file:

$ cat testfile

This is a text
file

This line should be deleted
this-should-not.

Answer 1

Just for fun, here’s a pure bash version which doesn’t call any other executable (since you asked for it in bash):

$ while read a b; do if [ -z "$b" ]; then echo $a;fi;done <testfile