Thanks panyam. But my question is totally different. I have certain records in a file. First field is YYYYMMDD(Yearmonth and date) and the second field is HHMMSS(Hour,min and sconds).this is 24 Hrs format. Then I have to convert the time in the fields to IST. i.e. I have to add 5 hrs 30 min to the second field. and then obviously i have to check the date.suppose if the time in second field is 233000. then the new time will be 050000. and the date will be incremented by 1. I have to implement this scenario.
sample input file:
----------------
Output File:
-----------
The date has been changed in the 4th record.
Please help if anybody having any idea.
Last edited by Franklin52; 08-03-2011 at 01:13 PM..
Reason: Please use code tags for data and code samples, thank you
Hello,
Did anyone know how to use script (e.g. perl) to conver Unix Timestame to real timestame in GMT+8 ?
1245900787 file:/tmp/a/Test/.txt.swp has created
1245900988 file:/tmp/a/Test/.txt.swp has changed
Thu, 25 Jun 2009 11:33:07 GMT+8 file:/tmp/a/Test/.txt.swp has created
Thu, 25 Jun... (4 Replies)
Hi All,
I have a string like below.
"Mar 31 2009" .
I want to convert this to unix time .
Also please let me know how to find the unix time for the above string minus one day. For Eg. if i have string "Mar 31 2009" i want to find the unix time stamp of "Mar 30 2009".
Thanks in advance,... (11 Replies)
Hi,
In a field, I should receive the date with time stamp in a particular field. But sometimes the vendor sends just the date or the timestamp or correctl the date×tamp. I have to figure out the the data is a date or time stamp or date×tamp.
If it is date then append "<space>00:00:00"... (1 Reply)
hello,
i have an AIX5.3 machine and i am writing a script to display some processes.
inside the script i want to get the time that the process starts and convert it to a unix timestamp.
is there a command that i can use to do that? i search the web but all i found is long scripts and it does... (4 Replies)
Hello,
I have files that with a naming convention as shown below. Some of the files have dates in the file name and some of them don't have dates in the file name.
imap-hp-import-20150917.txt
imap-dell-gec-import-20150901.txt
imap-cvs-import-20150915.txt
imap-gec-import.txt... (8 Replies)
Hello ,
I am working on AIX. I have to convert Unix timestamp to normal timestamp. Below is the file. The Unix timestamp will always be preceded by
EFFECTIVE_TIME as first field as shown and there could be multiple EFFECTIVE_TIME in the file : 3.txt
Contents of... (6 Replies)
Hi Team,
Could you please let me know ,how to convert Epoch column to timestamp in a flat file.
"57894"|"1454247163111"|"""HH"""
"57897"|"1454247163111"|"""HH"""
"7906"|"1454247163111"|"""ss"""
I want second field as timestamp.
This thread has been moved from a non-technical forum to... (6 Replies)
Hello All,
I have a date in DD/MM/YYYY format. I am trying to convert this into unix timestamp. I have tried following:
date -d $mydate +%s
where mydate = 23/12/2016 00:00:00
I am getting following error:
date: extra operand `+%s'
Try `date --help' for more information.
... (1 Reply)
Hi,
I have a data file where the timestamp is in the style of:
2016-10-11 07:01:23.375-500
which is yyyy-mm-dd hh-mm-ss-000 then time conversion from UTC
What i need to do is convert these timestamps from the above format to a the Serial Date format (i.e 42,654.2920446 )
now.. if... (14 Replies)
Discussion started by: AshBax
14 Replies
LEARN ABOUT DEBIAN
bup-margin
bup-margin(1) General Commands Manual bup-margin(1)NAME
bup-margin - figure out your deduplication safety margin
SYNOPSIS
bup margin [options...]
DESCRIPTION
bup margin iterates through all objects in your bup repository, calculating the largest number of prefix bits shared between any two
entries. This number, n, identifies the longest subset of SHA-1 you could use and still encounter a collision between your object ids.
For example, one system that was tested had a collection of 11 million objects (70 GB), and bup margin returned 45. That means a 46-bit
hash would be sufficient to avoid all collisions among that set of objects; each object in that repository could be uniquely identified by
its first 46 bits.
The number of bits needed seems to increase by about 1 or 2 for every doubling of the number of objects. Since SHA-1 hashes have 160 bits,
that leaves 115 bits of margin. Of course, because SHA-1 hashes are essentially random, it's theoretically possible to use many more bits
with far fewer objects.
If you're paranoid about the possibility of SHA-1 collisions, you can monitor your repository by running bup margin occasionally to see if
you're getting dangerously close to 160 bits.
OPTIONS --predict
Guess the offset into each index file where a particular object will appear, and report the maximum deviation of the correct answer
from the guess. This is potentially useful for tuning an interpolation search algorithm.
--ignore-midx
don't use .midx files, use only .idx files. This is only really useful when used with --predict.
EXAMPLE
$ bup margin
Reading indexes: 100.00% (1612581/1612581), done.
40
40 matching prefix bits
1.94 bits per doubling
120 bits (61.86 doublings) remaining
4.19338e+18 times larger is possible
Everyone on earth could have 625878182 data sets
like yours, all in one repository, and we would
expect 1 object collision.
$ bup margin --predict
PackIdxList: using 1 index.
Reading indexes: 100.00% (1612581/1612581), done.
915 of 1612581 (0.057%)
SEE ALSO bup-midx(1), bup-save(1)BUP
Part of the bup(1) suite.
AUTHORS
Avery Pennarun <apenwarr@gmail.com>.
Bup unknown-bup-margin(1)