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| W |
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| | w — display information about currently logged-in users (  ) |
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| | w — who is logged in, and what are they doing ( ) |
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| | wait — shell built-in function to wait for other jobs or processes ( ) |
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| | wc — display a count of lines, words and characters in a file ( ) |
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| | what — extract SCCS version information from a file ( ) |
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| | whatis — describe command ( ) |
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| | whence — shell built-in functions to set/get attributes and values for shell variables and functions ( ) |
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| | whereis — locate the binary, source and manual page files for a command ( ) |
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| | which — locate a command; display its pathname or alias ( ) |
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| | who is logged in — w ( ) |
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| | who — who is on the system ( ) |
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| | whoami — display effective user name ( ) |
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| | whocalls — report on the calls to a specific procedure ( ) |
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| | whois — Internet user name directory service ( ) |
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| | write — write to another user ( ) |
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| | write file checksums and sizes — cksum ( ) |
