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Old 09-21-2003, 06:43 AM   #1
J_Szucs
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Location: Budapest, Hungary
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D[a]mned sort


I am highly frustrated by the behaviour of the standard unix sort command, which seems to always sort on all fields of a line, even if I specify one field to sort on.

If input of sort is like:
ON user2
OFF user2
ON user1

'cat input | sort +1' will always produce the following output:
ON user1
OFF user2
ON user2

Note that the output is also sorted on field0, though noone told sort to sort on field0.
Is there a way to tell sort not to sort on a specific field, i.e. leaving the lines in the positional order, instead?

My intention is that the sort output should be like this:
ON user1
ON user2
OFF user2
(i.e. it is not sorted on field0, only on field1)
 
Old 09-21-2003, 07:25 AM   #2
druuna
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man sort says:

-s stabilize sort by disabling last resort comparison

cat infile.sort
ON user2
OFF user2
ON user1

$ sort -s +1 infile.sort
ON user1
ON user2
OFF user2

Last edited by druuna; 09-21-2003 at 07:27 AM.
 
Old 09-21-2003, 09:02 AM   #3
idaho
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try sort -k 2,2

-k specifies the key field to sort on. The n,m argument specify the first and the last fields to sort on.
 
Old 09-21-2003, 03:42 PM   #4
J_Szucs
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Original Poster
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Thank you for the tips, both worked.
I already tried out a sort -k command, which (now I know) did not work as I thought the first data is field 0, the second is field 1, so tried sort -k 1,1 and dropped the idea when it did not work.

Last edited by J_Szucs; 09-21-2003 at 03:46 PM.
 
  


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