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Chapter 9

Chapter 9. Basic File Processing. Displaying File Contents. cat, cat w/append tac nl pr more less head tail. Table 9.1 Some Useful less Commands. Table 9.1 More less Commands. File Location Commands. cp mv ln rm mkdir rmdir.

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Chapter 9

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  1. Chapter 9 Basic File Processing

  2. Displaying File Contents • cat, cat w/append • tac • nl • pr • more • less • head • tail

  3. Table 9.1 Some Useful less Commands

  4. Table 9.1 More less Commands

  5. File Location Commands • cp • mv • ln • rm • mkdir • rmdir

  6. Figure 9.1  Current directory before and after command cp temp temp.bak

  7. Figure 9.2 Current directory before and after command mv temp backups/temp.old

  8. Figure 9.3  Current directory before and after command rm temp backups/temp.old

  9. File Statistics Commands • ls –l • wc

  10. Comparing Files • cmp, zcmp • diff, zdiff • Output is a set of commands that can be used with the ed (or vi) editor to convert the first file into the second file • Often used to send out upgrades

  11. Table 9.2 File Conversion Instructions Produced by diff

  12. Removing Repeated Lines • uniq command • Intended for use on sorted files • Produces an output file with only one copy of any repeated consecutive lines

  13. Table 9.3 Printing

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