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What is filter explain with an example?

on 2014-11-18 16:01:32   by samim   on BCA  1 answers

Debabrata

on 2014-11-19 10:30:00  

in unix filter is a program that gets most of its data from standard output & writes its main results to standard input. unix filters are oftten used as elements of pipe lines. eg- cut -d : -f 1 /etc/passwd | grep foo