Eric Blake wrote: > Ali Khanafer wrote: > > I tried comm on test1.txt and test2.txt. The output I got is in > > comm-test.txt. Comm found 11 common lines and missed 6 other lines. > > > > Could you please explain why this is happening? > > Using a newer version of coreutils would tell you why: > ... > Proper use of comm requires that you pre-sort both input files. As > such, this is not a bug in comm, so I'm closing this bug. However, feel > free to add further comments or questions.
If you are using bash then a bash specific feature is useful. You can sort them on the fly. comm <(sort test1) <(sort test2) Or perhaps forcing a sort locale. env LC_ALL=C comm <(sort test1) <(sort test2) I included LC_ALL=C to force a specific sort order which may or may not be appropriate for all of your use cases. Bob
