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Full Discussion: Information about users who logged in last 24 hours
Top Forums Shell Programming and Scripting Information about users who logged in last 24 hours Post 302598031 by saket18@ymail.c on Monday 13th of February 2012 06:10:17 AM
Old 02-13-2012
@agama
It seems -F option is invalid for last command.I am getting following error message:

last: invalid option -- F
Usage: last [-num | -n num] [-f file] [-t YYYYMMDDHHMMSS] [-R] [-x] [-o] [username..] [tty..]
 

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LEARN ABOUT CENTOS

tcbtest

TCBTEST(1)							   Tokyo Cabinet							TCBTEST(1)

NAME

       tcbtest - test cases of the B+ tree database API

DESCRIPTION

       The command `tcbtest' is a utility for facility test and performance test.  This command is used in the following format.  `path' specifies
       the path of a database file.  `rnum' specifies the number of iterations.  `lmemb' specifies the	number	of  members  in  each  leaf  page.
       `nmemb'	specifies the number of members in each non-leaf page.	`bnum' specifies the number of buckets.  `apow' specifies the power of the
       alignment.  `fpow' specifies the power of the free block pool.

	      tcbtest write [-mt] [-cd|-ci|-cj] [-tl] [-td|-tb|-tt|-tx] [-lc num] [-nc num] [-xm num] [-df num]  [-ls  num]  [-ca  num]  [-nl|-nb]
	      [-rnd] path rnum [lmemb [nmemb [bnum [apow [fpow]]]]]
		     Store records with keys of 8 bytes.  They change as `00000001', `00000002'...
	      tcbtest read [-mt] [-cd|-ci|-cj] [-lc num] [-nc num] [-xm num] [-df num] [-nl|-nb] [-wb] [-rnd] path
		     Retrieve all records of the database above.
	      tcbtest remove [-mt] [-cd|-ci|-cj] [-lc num] [-nc num] [-xm num] [-df num] [-nl|-nb] [-rnd] path
		     Remove all records of the database above.
	      tcbtest  rcat [-mt] [-cd|-ci|-cj] [-tl] [-td|-tb|-tt|-tx] [-lc num] [-nc num] [-xm num] [-df num] [-ls num] [-ca num] [-nl|-nb] [-pn
	      num] [-dai|-dad|-rl|-ru] path rnum [lmemb [nmemb [bnum [apow [fpow]]]]]
		     Store records with partway duplicated keys using concatenate mode.
	      tcbtest queue [-mt] [-cd|-ci|-cj] [-tl] [-td|-tb|-tt|-tx] [-lc num] [-nc num] [-xm num] [-df num] [-ls num] [-ca num] [-nl|-nb] path
	      rnum [lmemb [nmemb [bnum [apow [fpow]]]]]
		     Perform queueing and dequeueing.
	      tcbtest misc [-mt] [-tl] [-td|-tb|-tt|-tx] [-nl|-nb] path rnum
		     Perform miscellaneous test of various operations.
	      tcbtest wicked [-mt] [-tl] [-td|-tb|-tt|-tx] [-nl|-nb] path rnum
		     Perform updating operations selected at random.

       Options feature the following.

	      -mt : call the function `tchdbsetmutex'.
	      -cd : use the comparison function `tccmpdecimal'.
	      -ci : use the comparison function  `tccmpint32'.
	      -cj : use the comparison function  `tccmpint64'.
	      -tl : enable the option `BDBTLARGE'.
	      -td : enable the option `BDBTDEFLATE'.
	      -tb : enable the option `BDBTBZIP'.
	      -tt : enable the option `BDBTTCBS'.
	      -tx : enable the option `BDBTEXCODEC'.
	      -lc num : specify the number of cached leaf pages.
	      -nc num : specify the number of cached non-leaf pages.
	      -xm num : specify the size of the extra mapped memory.
	      -df num : specify the unit step number of auto defragmentation.
	      -ls num : specify the maximum size of each leaf page.
	      -ca num : specify the capacity number of records.
	      -nl : enable the option `BDBNOLCK'.
	      -nb : enable the option `BDBLCKNB'.
	      -rnd : select keys at random.
	      -wb : use the function `tcbdbget3' instead of `tcbdbget'.
	      -pn num : specify the number of patterns.
	      -dai : use the function `tcbdbaddint' instead of `tcbdbputcat'.
	      -dad : use the function `tcbdbadddouble' instead of `tcbdbputcat'.
	      -rl : set the length of values at random.
	      -ru : select update operations at random.

       This command returns 0 on success, another on failure.

SEE ALSO

       tcbmttest(1), tcbmgr(1), tcbdb(3), tokyocabinet(3)

Man Page							    2012-08-18								TCBTEST(1)
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