Bulletproof web design - Chapter 7 . Using Documentation 281 The -w
Chapter 7 . Using Documentation 281 The -w option is useful for discovering the location of man page entries. Using this option for the crontabutility produces the following. # man -w crontab /usr/man/man1/crontab.1.gz Exam Tip Be sure to know the search options and their function. These include -a, -K, and -k. Searching man page sections Linux man page information exists in a collection of files. These files are grouped into sections, with each section containing a specific type of information. Table 7-2 lists the sections and their uses. Table 7-2 Man Page Sections Section Use 1 User commands and applications 2 System calls and kernel errors 3 Library calls 4 Device drivers and network protocols 5 Standard file formats 6 Games and demonstrations 7 Miscellaneous files and documents 8 System administration commands 9 Obscure kernel specs and interfaces When an argument is passed to the man command, the sections are searched in a specific order and the first match is returned. The default search order is as follows: 1, 8, 2, 3, 4, 5, 6, 7, 9. It is also possible to specify the man page section to search. If you wish to search section five for information on the crontab utility, you would use the following command: # man 5 crontab
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