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Full Discussion: Difference between two date values
Top Forums UNIX for Dummies Questions & Answers Difference between two date values Post 302957621 by sam@sam on Tuesday 13th of October 2015 09:41:47 AM
Old 10-13-2015
Difference between two date values
Code:
bash-3.00$ date

Tue Oct 13 15:03:54 CEST 2015
Code:
start=`date +"%T" | awk -F":" '{print $2,$3}'`
echo $start
08 17
end=`date +"%T" | awk -F":" '{print $2,$3}'`
echo $end
08 37

how can I get the difference between above both timestamps, Im trying but getting errors: any one please help
Code:
bash-3.00$ echo `expr $end - $start`
expr: syntax error

bash-3.00$ echo  $(($end - $start))
bash: 08: value too great for base (error token is "08")

expected output for this case should be something like 00 20

Moderator's Comments:
Mod Comment Please use CODE tags for sample input and output as well as for code segments.
Last edited by Don Cragun; 10-22-2015 at 03:10 AM.. Reason: Put sample output in bold CODE tags.
 

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LEARN ABOUT ULTRIX

ucblinks

ucblinks(1B)					     SunOS/BSD Compatibility Package Commands					      ucblinks(1B)

NAME

       ucblinks - adds /dev entries to give SunOS 4.x compatible names to SunOS 5.x devices

SYNOPSIS

       /usr/ucb/ucblinks [-e rulebase] [-r rootdir]

DESCRIPTION

       ucblinks  creates symbolic links under the /dev directory for devices whose SunOS 5.x names differ from their SunOS 4.x names. Where possi-
       ble, these symbolic links point to the device's SunOS 5.x name rather than to the actual /devices entry.

       ucblinks does not remove unneeded compatibility links; these must be removed by hand.

       ucblinks should be called each time the system is reconfiguration-booted, after any new SunOS 5.x links that are needed have been  created,
       since the reconfiguration may have resulted in more compatibility names being needed.

       In  releases prior to SunOS 5.4, ucblinks used a  nawk rule-base to construct the SunOS 4.x compatible names. ucblinks no longer uses  nawk
       for the default operation, although  nawk rule-bases can still be specifed with the -e option.  The  nawk rule-base equivalent to the SunOS
       5.4 default operation can be found in /usr/ucblib/ucblinks.awk.

OPTIONS

       -e rulebase     Specify rulebase as the file containing nawk(1) pattern-action statements.

       -r rootdir      Specify rootdir as the directory under which dev and devices will be found, rather than the standard root directory /.

FILES

       /usr/ucblib/ucblinks.awk        sample rule-base for compatibility links

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWscpu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       devlinks(1M), disks(1M), ports(1M), tapes(1M), attributes(5)

SunOS 5.10							    13 Apr 1994 						      ucblinks(1B)
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