UNIX for Dummies Questions & Answers

Hi all,
I want to sort a file based on the number in the 9th column
I've tried both of the following commands
sort -k 9,9n file_to_sort.dat

sort +8 -n file_to_sort.dat

both resulting in the same output which does sort col 9 nummerically
but it doesn't output the lines in the original order they occurred

for example if I input
10.000000 2 21 13 0.7 0.9 -0.1 0.3 0 -0.098
10.389985 2 43 21 0.3 0.7 0.3 0.3 0 0.310
11.473330 2 29 21 0.5 0.7 0.1 0.3 0 0.126
11.978573 2 30 21 0.4 0.6 0.1 0.3 0 0.151
26.455198 2 12 23 0.4 0.6 0.4 0.4 1 0.151
101.045498 2 21 36 0.8 0.5 -0.1 0.1 0 -0.098
102.346752 2 34 54 0.3 0.4 0.9 0.6 1 0.275
109.565385 2 21 33 0.7 0.5 0.1 0.1 0 -0.098
110.237589 2 32 23 0.9 0.6 0.8 0.6 1 0.252
111.59287 2 32 23 0.9 0.2 0.9 0.7 1 0.252
126.697432 2 22 32 0.7 0.5 0.1 0.1 0 -0.098

results in
10.000000 2 21 13 0.7 0.9 -0.1 0.3 0 -0.098
101.045498 2 21 36 0.8 0.5 -0.1 0.1 0 -0.098
10.389985 2 43 21 0.3 0.7 0.3 0.3 0 0.310
109.565385 2 21 33 0.7 0.5 0.1 0.1 0 -0.098
11.473330 2 29 21 0.5 0.7 0.1 0.3 0 0.126
11.978573 2 30 21 0.4 0.6 0.1 0.3 0 0.151
126.697432 2 22 32 0.7 0.5 0.1 0.1 0 -0.098
etc

whereas I expect it to look like the original file
with numbers in col 1 in their orginal order except the lines that have col 9=1 which should be moved towards the end and in their original order also
10.000000 2 21 13 0.7 0.9 -0.1 0.3 0 -0.098
10.389985 2 43 21 0.3 0.7 0.3 0.3 0 0.310
11.473330 2 29 21 0.5 0.7 0.1 0.3 0 0.126
11.978573 2 30 21 0.4 0.6 0.1 0.3 0 0.151
101.045498 2 21 36 0.8 0.5 -0.1 0.1 0 -0.098
109.565385 2 21 33 0.7 0.5 0.1 0.1 0 -0.098
126.697432 2 22 32 0.7 0.5 0.1 0.1 0 -0.098
...
26.455198 2 12 23 0.4 0.6 0.4 0.4 1 0.151
102.346752 2 34 54 0.3 0.4 0.9 0.6 1 0.275
110.237589 2 32 23 0.9 0.6 0.8 0.6 1 0.252
111.59287 2 32 23 0.9 0.2 0.9 0.7 1 0.252

Thanks a mil to anyone who can offer any suggestions

Best Regards,
Olga

Code:

sort -k9,9n -k1,1n inputfile

-or-

Code:

sort -n +8 +0 inputfile

Cheers
ZB

Works perfect - Excellent

Thanks a million,
Olga