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Full Discussion: Reporting last login details
Top Forums UNIX for Advanced & Expert Users Reporting last login details Post 302987346 by jim mcnamara on Thursday 8th of December 2016 09:56:49 AM
Old 12-08-2016
The last command is kind of a sore spot for me. I believe the date works the way the ls command handles dates - when displaying a record, after six months of age for the record, the year shows up.

This works to get a full date. The big number you see is the UNIX time (seconds since Jan 1970).

Code:
cat /var/adm/wtmpx | /usr/lib/acct/fwtmp | tac  > tmpfile
awk  '!arr[$1]++ {print $1 $2}'  tmpfile

-note the cat is intended fwtmp only reads from stdin. Since this is messy I would consider simply living with the knowledge of how dates are displayed.

You are going to have extra fields, so the awk needs some changing to suit your needs. i.e., change the awk print statement to show what you want
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fwtmp(1M)						  System Administration Commands						 fwtmp(1M)

NAME
fwtmp, wtmpfix - manipulate connect accounting records SYNOPSIS
/usr/lib/acct/fwtmp [-ic] /usr/lib/acct/wtmpfix [file...] DESCRIPTION
fwtmp reads from the standard input and writes to the standard output, converting binary records of the type found in /var/adm/wtmpx to formatted ASCII records. The ASCII version is useful when it is necessary to edit bad records. wtmpfix examines the standard input or named files in utmpx format, corrects the time/date stamps to make the entries consistent, and writes to the standard output. A hyphen (-) can be used in place of file to indicate the standard input. If time/date corrections are not performed, acctcon(1M) will fault when it encounters certain date-change records. Each time the date is set, a pair of date change records are written to /var/adm/wtmpx. The first record is the old date denoted by the string "old time" placed in the line field and the flag OLD_TIME placed in the type field of the utmpx structure. The second record speci- fies the new date and is denoted by the string new time placed in the line field and the flag NEW_TIME placed in the type field. wtmpfix uses these records to synchronize all time stamps in the file. In addition to correcting time/date stamps, wtmpfix will check the validity of the name field to ensure that it consists solely of alphanu- meric characters or spaces. If it encounters a name that is considered invalid, it will change the login name to INVALID and write a diag- nostic to the standard error. In this way, wtmpfix reduces the chance that acctcon will fail when processing connect accounting records. OPTIONS
-ic Denotes that input is in ASCII form, and output is to be written in binary form. FILES
/var/adm/wtmpx history of user access and administration information ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWaccu | +-----------------------------+-----------------------------+ SEE ALSO
acctcom(1), ed(1), acct(1M), acctcms(1M), acctcon(1M), acctmerg(1M), acctprc(1M), acctsh(1M), runacct(1M), acct(2), acct.h(3HEAD), utmpx(4), attributes(5) System Administration Guide: Basic Administration SunOS 5.10 22 Feb 1999 fwtmp(1M)
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