Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Add or Subtract the hours,minutes or seconds in the the time variable
Top Forums Shell Programming and Scripting Add or Subtract the hours,minutes or seconds in the the time variable Post 302891934 by ahamed101 on Sunday 9th of March 2014 08:46:05 PM
Old 03-09-2014
Using GNU date
Code:
root@maximus:/tmp# echo $dd
2014-03-09 17:38:55

root@maximus:/tmp# date -d "$dd 1 hour" "+%Y-%m-%d %H:%M:%S"
2014-03-09 18:38:55
root@maximus:/tmp# date -d "$dd 1 min" "+%Y-%m-%d %H:%M:%S"
2014-03-09 17:39:55
root@maximus:/tmp# date -d "$dd 1 sec" "+%Y-%m-%d %H:%M:%S"
2014-03-09 17:38:56

root@maximus:/tmp# date -d "$dd 1 hour ago" "+%Y-%m-%d %H:%M:%S"
2014-03-09 16:38:55
root@maximus:/tmp# date -d "$dd 1 min ago" "+%Y-%m-%d %H:%M:%S"
2014-03-09 17:37:55
root@maximus:/tmp# date -d "$dd 1 sec ago" "+%Y-%m-%d %H:%M:%S"
2014-03-09 17:38:54

Saving it in another variable
Code:
root@maximus:/tmp# new_date=$( date -d "$dd 1 sec ago" "+%Y-%m-%d %H:%M:%S" )
root@maximus:/tmp# echo $new_date
2014-03-09 17:38:54

Change the date format as you want.

HTH
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Convert minutes to hours, minutes, seconds

How would you convert lets say a 1000 minutes to hours, minutes, seconds (1 Reply)
Discussion started by: Vozx
1 Replies

2. Shell Programming and Scripting

script for add and subtract two hours

i find a script to calculate hours of job i(nclude extraordinary) i make a script to calculate add and subtract two hours (format hh:mm:ss) (7 Replies)
Discussion started by: ZINGARO
7 Replies

3. Shell Programming and Scripting

how to display time in minutes n seconds...

Hi all, may i know how to display time in minutes and seconds(may be milliseconds and even smaller that ) in shell scripts.... (1 Reply)
Discussion started by: santy
1 Replies

4. Shell Programming and Scripting

Difference in day-hours-minutes-seconds format

Hi experts, I am reading two log files and passing dates as output to a txt file. Code is given below: echo "Start Time:" >> Report.txt cat start.log | while read LINE1 do echo $DATE1 >> Report.txt done echo "End Time:" >> Report.txt cat end.log | while read LINE2 ... (7 Replies)
Discussion started by: Sreejith_VK
7 Replies

5. Shell Programming and Scripting

Process Time in hours or minutes only

Hi i want to print the time of a process in hours only..(or) in minutes only.Is there anyway to print the process such like that when i give the commnand like following #ps -eo pid,time PID TIME 412 01:49:32 481 00:03 it shows in HH:MM:SS format: Could anyone... (1 Reply)
Discussion started by: srikanthg
1 Replies

6. Shell Programming and Scripting

subtract minutes from time

i have the time 20100421043335 in format (date +%Y%m%d%H%M%S),and i want to be able to get the previous time 2 minutes ago,which is 20100421043135 (9 Replies)
Discussion started by: tomjones
9 Replies

7. Shell Programming and Scripting

Perl - Extract 12 hour time, convert to 24 and subtract 15 minutes?

OK, I am by no means a programmer... I have been given the task to do some automation scripts. I have got most of it working from snippets I have found on the Web. One requirement has me stumped. The initial timing file created by the user is a comma delimited in the following format.... (4 Replies)
Discussion started by: autotuner
4 Replies

8. Shell Programming and Scripting

How to subtract time by 10 minutes in datecalc tool

Hi guys. I am trying to subtract 10 minutes from the current Unix system date and time. I have the datecalc provided here but it is mainly the date and not the time. Please check on how can i subtract 10 minutes from the current time using datecalc or any other shell scripting that will... (2 Replies)
Discussion started by: bantiloe
2 Replies

9. Shell Programming and Scripting

How to split numeric value into hours:minutes:seconds

I have a problem. I am working on a Call Detail Report system. Come to find out the phone switch does not report in seconds. It is a 5 digit field that reports h:mm:ss The problem is I have 1-5 digit numbers Ie 1 = 1 second and should be reported as 0:00:01 22 should be 0:00:22 321 should be... (5 Replies)
Discussion started by: truecall
5 Replies

10. UNIX for Beginners Questions & Answers

How to convert days hours minutes seconds to minutes?

Hi, please help with below time conversion to minutes. one column values: 2 minutes 16 seconds 420 msec 43 seconds 750 msec 0 days 3 hours 29 minutes 58 seconds 480 msec 11 seconds 150 msec I need output in minutes(total elapsed time in minutes) (2 Replies)
Discussion started by: ramu.badugula
2 Replies

LEARN ABOUT CENTOS

pmdate

PMDATE(1)						      General Commands Manual							 PMDATE(1)

NAME

       pmdate - display an offset date

SYNOPSIS

       pmdate [ offset ... ] format

DESCRIPTION

       pmdate displays the current date and/or time, with an optional offset.

       An offset is specified with a leading sign (``+'' or ``-''), followed by an integer value, followed by one of the following ``scale'' spec-
       ifiers;

       S      seconds
       M      minutes
       H      hours
       d      days
       m      months
       y      years

       The output format follows the same rules as for date(1) and strftime(3).

       For example, the following will display the date a week ago as DDMMYYYY;
	       pmdate -7d %d%m%Y

PCP ENVIRONMENT

       Environment variables with the prefix PCP_ are used to parameterize the file and directory names used by PCP.  On  each	installation,  the
       file  /etc/pcp.conf contains the local values for these variables.  The $PCP_CONF variable may be used to specify an alternative configura-
       tion file, as described in pcp.conf(5).

SEE ALSO

       date(1), strftime(3), pcp.conf(5) and pcp.env(5).

Performance Co-Pilot							PCP								 PMDATE(1)
All times are GMT -4. The time now is 10:57 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy