Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

Convert Epoch Time to Standard Date and Time & Vice Versa

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Convert Epoch Time to Standard Date and Time & Vice Versa
# 1  
Old 11-11-2008
Convert Epoch Time to Standard Date and Time & Vice Versa
Hi guys,

I know that this topic has been discuss numerous times, and I have search the net and this forum for it.

However, non able to address the problem I faced so far.

I am on Solaris Platform and unable to install additional packages like the GNU date and gawk to make use of their functions.

Hence, I intend to go for Perl and include a one-liner command in the shell script for the conversion.

As you can see below, I have no problem converting Epoch to Standard Date/Time.
But for converting Standard Date/Time to Epoch, I am not getting the correct Epoch value.

Am I missing anything here? Smilie

Convert Epoch to Standard Date/Time
Code:
bash-3.00# perl -e 'print scalar(localtime(1226424300)), "\n"'
Wed Nov 12 01:25:00 2008

Convert Standard Date/Time to Epoch
Code:
bash-3.00# perl -e 'use Time::Local; print timelocal(0,25,1,11,11,2008), "\n";'
1228929900
bash-3.00# perl -e 'use Time::Local; print timegm(0,25,1,11,11,2008), "\n";'
1228958700


Thanks in advance.
# 2  
Old 11-12-2008
works for me:
Code:
[yogeshs@helptoldreal-lr yogeshs]$ perl -e 'use Time::Local; print timelocal(0,25,1,11,11,2008), "\n";'
1228938900
[yogeshs@helptoldreal-lr yogeshs]$ perl -e 'print scalar(localtime(1228938900)), "\n"'
Thu Dec 11 01:25:00 2008
[yogeshs@helptoldreal-lr yogeshs]$

can you post a similar example where the epoch value you got is incorrect?
# 3  
Old 11-12-2008
Quote:
Originally Posted by Yogesh Sawant
works for me:
Code:
[yogeshs@helptoldreal-lr yogeshs]$ perl -e 'use Time::Local; print timelocal(0,25,1,11,11,2008), "\n";'
1228938900
[yogeshs@helptoldreal-lr yogeshs]$ perl -e 'print scalar(localtime(1228938900)), "\n"'
Thu Dec 11 01:25:00 2008
[yogeshs@helptoldreal-lr yogeshs]$

can you post a similar example where the epoch value you got is incorrect?
Hi Yogesh,

Thanks for the reply.

I found out that the month parameter for perl timelocal() need to "- 1".
As in Jan to specify "0", Dec to specify 11.
I got the value wrong, thats why epoch is not returning a consistent value.

Code:
bash-3.00# perl -e 'print scalar(localtime(1226426701)), "\n"'
Wed Nov 12 02:05:01 2008
bash-3.00# perl -e 'use Time::Local; print timelocal(1,5,2,12,10,2008), "\n"'
1226426701

Really appreciate your help
# 4  
Old 02-06-2009
can i use above function as below .?
Code:
i=1226424300;
perl -e 'print scalar(localtime("$i")), "\n"'

Thanks
Avklinux
Last edited by Yogesh Sawant; 02-15-2011 at 07:22 AM.. Reason: added code tags
# 5  
Old 02-07-2009
Quote:
Originally Posted by DrivesMeCrazy
I found out that the month parameter for perl timelocal() need to "- 1".
As in Jan to specify "0", Dec to specify 11.
I got the value wrong, thats why epoch is not returning a consistent value.
Thats it. 0-11 for the months just like localtime(). Good catch.
# 6  
Old 02-07-2009
Not sure about perl but in bash:

Code:
# epoch
$ date +%s

# If you have a time already in mind you can change the line above to use YOUR time and not system time like this:
Code:
date -d "Sat Feb  7 00:37:06 EST 2009" +%s

# result = 1233985026

# and back to regular time from epoch
Code:
date --date "Jan 1, 1970 00:00:00 +0000 + `date +%s` seconds"

#You can substitute `date +%s` in the line above with your own epoch time that you have already obtained

Code:
date --date "Jan 1, 1970 00:00:00 +0000 + 1233985026 seconds"

# result = Sat Feb 7 00:37:06 EST 2009
Last edited by rbatte1; 07-05-2016 at 04:52 AM.. Reason: Code tags
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Convert Second Column Date Into EPOCH Time And Print Complete Row

Hello Team, I am stuck in getting the required output in the following case. Please help. My input file is aa|08/01/2016 bb|08/15/2016 I wish to convert the file into aa|epoch time bb|epoch time I am using following code: (3 Replies)
Discussion started by: angshuman
3 Replies

2. Shell Programming and Scripting

Convert epoch time to Julian date

Need assistance in converting an epoch time to Julian date To get epoch perl -e 'use Time::Local; print timelocal(1,5,2,12,10,2008), "\n"' (3 Replies)
Discussion started by: ajayram_arya
3 Replies

3. Shell Programming and Scripting

Calculating the epoch time from standard time using awk and calculating the duration

Hi All, I have the following time stamp data in 2 columns Date TimeStamp(also with milliseconds) 05/23/2012 08:30:11.250 05/23/2012 08:30:15.500 05/23/2012 08:31.15.500 . . etc From this data I need the following output. 0.00( row1-row1 in seconds) 04.25( row2-row1 in... (5 Replies)
Discussion started by: ks_reddy
5 Replies

4. Shell Programming and Scripting

Using awk or nawk to convert epoch time to date format

Looking for some help and usually when I do a search this site comes up. Hopefully someone can give me a little direction as to how to use one of these two commands to achieve what I'm trying to do. What am I trying to do? I need to take the time value in epoch format returned from the... (5 Replies)
Discussion started by: minigts
5 Replies

5. Shell Programming and Scripting

Shell script to convert epoch time to real time

Dear experts, I have an epoch time input file such as : - 1302451209564 1302483698948 1302485231072 1302490805383 1302519244700 1302492787481 1302505299145 1302506557022 1302532112140 1302501033105 1302511536485 1302512669550 I need the epoch time above to be converted into real... (4 Replies)
Discussion started by: aismann
4 Replies

6. Shell Programming and Scripting

Convert epoch to human readable date & time format

Hello I have log file from solaris system which has date field converted by Java application using System.currentTimeMillis() function, example is 1280943608380 which equivalent to GMT: Wed, 04 Aug 2010 17:40:08 GMT. Now I need a function in shell script which will convert 1280943608380... (3 Replies)
Discussion started by: Yaminib
3 Replies

7. Shell Programming and Scripting

how to convert date time to epoch time in solaris

Hi, Is there any easy way to convert date time(stored in shell variable ) to epoch time in solaris box? As +%s is working on linux but not on solaris, also -d option is not working. Any suggestion please? (6 Replies)
Discussion started by: anshuman0507
6 Replies

8. Shell Programming and Scripting

Convert Unix Time to Standard Time

I have a list of interfaces and time the interface was last active. I can't figure out how to convert the time in the second column, Fa1/14 0 Se0/0/0 0 Fa1/11 0 Fa1/9 0 Fa1/0 0 Se0/0/1 1240401408 Gi1/0 0 Fa0/0 1240401408 Fa1/3 0 Fa1/8 0 Fa1/15 0 Fa1/13 0 Fa1/10 0 Fa1/1 0 Fa1/12... (7 Replies)
Discussion started by: mrlayance
7 Replies

9. Shell Programming and Scripting

Convert Epoch time format to normal date time format in the same file

I have a file named "suspected" with series of line like these : {'protocol': 17, 'service': 'BitTorrent KRPC', 'server': '219.78.120.166', 'client_port': 52044, 'client': '10.64.68.44', 'server_port': 8291, 'time': 1226506312L, 'serverhostname': ''} {'protocol': 17, 'service': 'BitTorrent... (3 Replies)
Discussion started by: rk4k
3 Replies

10. Shell Programming and Scripting

Convert from standard epoch time from a shell script?

Is there an easy method to do an on the fly conversion of a standard epoch time (seconds from 1970) to more readable date format? Does Unix have anything built in to do this? (4 Replies)
Discussion started by: LordJezo
4 Replies
Login or Register to Ask a Question