CPSC 1280 Lecture Notes - Lecture 14: Cpio, Uniq, Delimiter
30 Oct 2016
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Sorting is the ordering of data in ascending or descending sort sorts lines contained in a group of files alphabetically: $ sort filenames. The sorted output redirection: $ sort input1. txt input2. txt > output. txt, outputs the sorted content of files input1. txt and input2. txt to the file output. txt. Folds lowercase to equivalent uppercase (case-insensitive) place output in file flname checks if file is sorted. $ sort -t: -k 3,3 -k 2,2 shortlist. Uniq utility uniq removes duplicate adjacent lines from a file: $ uniq filename. $ uniq file1 hey hi hey hi uniq is most useful when combined with sort: $ sort filename| uniq. $ cat file1 hey hey hi hey hi hi. There are a number of reasons that you might want to save some files to a secondary storage such as disk or tape: for daily, weekly, or monthly backups, for transport between non-networked unix sites, for posterity (i. e. future generation)
