It's doing exactly what it says - it's adding a newline to the end of your input file as one isn't there, e.g.
Code:
$ echo -n "foo" | sort
sort: warning: missing NEWLINE added at EOF
foo
$ echo "foo" | sort
foo
You can suppress this benign message by redirecting STDERR to /dev/null, or by appending a newline to your input file, e.g.:
Code:
$ ( gzip -dc ./file.gz; echo ) | sort
-or-
$ gzip -dc ./file.gz | sort 2>/dev/null
You can verify that the last line of your input file doesn't contain a newline with:
Code:
$ gzip -dc ./file.gz | tail -1 | od -c
Cheers,
ZB
