On 06/10/2010 10:39 AM, Peng Yu wrote: > Hi, > > I don't think that I completely understand what key means. In the > following example, I thought that --key=2 should order the lines by > the 2nd letter in each line without reordering the lines with the same > 2nd letter. But it turns out my understanding is not correct. For > example, "u a" was before "a a" sorting, but "u a" is after "a a" > after sorting.
'--key=2' implies a primary sort key from the second field (not second letter), through the end of the line, with a secondary sort key of the entire line. '--key=2,2' implies a primary sort key of just the second field, with a secondary sort key of the entire line. You want '--key=2,2 --stable', which disables the secondary sort over the entire line. -- Eric Blake [email protected] +1-801-349-2682 Libvirt virtualization library http://libvirt.org
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