bash - Sorting in unix while other field doesn't change -

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i have file

1 4 2 1 2 1 1 2 4 5 1 2 4 5 9 2 3 4 5 1 1 0 2 1 5 2 2 2 1 1

sort -k1 file gives 

1 0 2 1 5 1 1 2 4 5 1 2 4 5 9 1 4 2 1 2 2 2 2 1 1 2 3 4 5 1

i want first field sorted, others remains should at, e.g. sorted file should give:

1 4 2 1 2 1 1 2 4 5 1 2 4 5 9 1 0 2 1 5 2 3 4 5 1 2 2 2 1 1

similarly sort -k1r testsort gives

2 3 4 5 1 2 2 2 1 1 1 4 2 1 2 1 2 4 5 9 1 1 2 4 5 1 0 2 1 5

when want 

2 3 4 5 1 2 2 2 1 1 1 4 2 1 2 1 1 2 4 5 1 2 4 5 9 1 0 2 1 5

how can in unix?

try this:

sort -s -n -k 1,1

this work, , learn more can see here


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