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Dual printing
Multiplexed printing is missing from all Unix/Linux printing systems that I know of. If you want to print to printer "Main" and have the output appear on two different physical printers, there's no way to specify that when creating "Main". I don't mean printer classes, where you want "Main" to pick an available printer from a pool. I mean where you want one print command to appear on two or more physical devices.
A mistaken grep A recent post at Unix.com was from someone having difficulty with "grep". This happened to be on Mac OS X, but it really could have happened almost anywhere, even on Windows. The poster was trying to grep a string from a Neo Office document and of course not getting great results.
Sort -u vs. uniq I have sometimes seen people use a pipeline that includes "sort | uniq". The result of that is no different than just adding a -u flag to sort and absolutely requires more time and processing power - not that it usually matters; unless the input is humongously long, you'd need to run them through "time" to spot any difference. So why use "uniq"?
A mistaken grep A recent post at Unix.com was from someone having difficulty with "grep". This happened to be on Mac OS X, but it really could have happened almost anywhere, even on Windows. The poster was trying to grep a string from a Neo Office document and of course not getting great results.
Sort -u vs. uniq I have sometimes seen people use a pipeline that includes "sort | uniq". The result of that is no different than just adding a -u flag to sort and absolutely requires more time and processing power - not that it usually matters; unless the input is humongously long, you'd need to run them through "time" to spot any difference. So why use "uniq"?
