Every time we build an executable the date and time are put into the file, I need to run checksum on just the working lines.(IE, no header files)
Is this even possible, if so how would I go about it?
I am using a HP-UX server any help you can give me will be greatly appreciated.
Thanks (6 Replies)
Hello, I'm trying to retreive certain bits of info from a file.
the file contains a list like this
info1:info2:info3:info4
info1:info2:info3:info4
info1:info2:info3:info4
info1:info2:info3:info4
how do i pick out only info2 or only info3 without the others?
Thanks (11 Replies)
I have a logfile from which i need to extract certain pattern based on the time but the problem here is the time is not same for all days.
Input file:
Mon 12:34:56 abvjingjgg
Mon 12:34:57 ofjhjgjhgh
.
.
.
Mon 22:30:00 kkfng
.
.
.
Mon 23:12:23 kjgsdafhkljf
.
.
.
Tue 01:04:54... (8 Replies)
I understand the individual pieces of the following (with one exception ..), but how does it all work as one?
find ${HOME}/reports/ -name surveyresult*.txt -exec ls -1 {} \; | /usr/xpg4/bin/grep -E \
"${HOME}/reports/surveyresult{14,14}.txt" | sort > ${ResultsFileList}
Find all files like... (1 Reply)
Hello All,
I have a file like this
Define schema flat_file_schema
(
a varchar(20)
,b varchar(30)
,c varchar(40)
);
(Insert into table (
a
,b
,c
) values
(
1
,2
,3
); (4 Replies)
Hello All,
I have a file like this
APPLY
( 'INSERT INTO brdcst_media_cntnt (
cntnt_id
,brdcst_media_cntnt_cd
,cntnt_prvdr_cd
,data_src_type_cd
,cntnt_titl_nm
,cntnt_desc
,batch_dt
,batch_id
) VALUES
(
:cntnt_id (3 Replies)
I have number in file which contains date and serial number:
2013101000.
The last two digits are serial number (00). So maximum of serial number is 100.
After reaching 100 it becomes 00 with incrementing 10 which is day with max 31.
after reaching 31 it becomes 00 and increments 10... (31 Replies)
Hi all:
I have a 5-column tab-separated file.
The only thing that I want to do with it is to split it.
However, I want to split it with a 80/20 proportion -- randomized, if possible.
I know that something like :
awk '{print $0 ""> "file" NR}' RS='' input-file
will work, but it only... (6 Replies)
Dear all,
I would like to use SQL's log file to extract information from it.
This file can include four different types of instruction with the number of lines involved for each of them:
-> (1) "INSERT" instruction with the number of lines inserted
-> (2) "UPDATE" instruction with the... (4 Replies)
I have the string:
XXXX.YYYY_ZZZ.20180724.01.txt
I need to get rid of .txt and get full four parts
XXXX.YYYY_ZZZ.20180724.01
I did:
CTL=`echo XXXX.YYYY_ZZZ.20180724.01.txt | rev | cut -d"." -f4 | rev`
But got only YYYY_ZZZ
What should I do to get all four parts of that... (4 Replies)
Discussion started by: digioleg54
4 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)