> 1. How will you eliminate duplicate rows from file 'a' and store the > same in file 'b'?
First - it's best to use a subject line that's descriptive. Saying "help required" doesn't really help much. Better to say something like 'help with filtering' or something. There is a Unix tool called 'uniq' (for unique) that does what you want. But the file needs to first be sorted. So: $ sort < a | uniq >b does what I think is required. That'll return the file with the duplicate rows taken out. > 2. What is special about /dev/null file ? It's a special device (nearly everything in /dev are 'files' that inter- face with the kernel and, ultimately, hardware) that simply discards anything sent to it. > KIRAN K L ------------------------------------------------------------------------ David E. Fox Thanks for letting me [EMAIL PROTECTED] change magnetic patterns [EMAIL PROTECTED] on your hard disk. -----------------------------------------------------------------------
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