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

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

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

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

File Statistics Commands ls –l wc

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

Table 9.2 File Conversion Instructions Produced by diff

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

Table 9.3 Printing