I need to look at a log file every half hour or so to make sure that some activity is going on there. I thought I would write a quick PERL script that would copy the current log file to the temp directory, compare it to the previous log file (from 30 minutes ago) and exit with an error status if... (1 Reply)
Hi!
I have a need to do this in Perl.
script.pl -config file
The script would be doing a wget/LWP on a URL which is defined in the config file.
So when I run the script it should return either one of these conditions -
1) OK with exit status 0.
Should also print "wget URL"
2)... (6 Replies)
hi guys
i have this very messy script, that looks in /var/log/messages.all for an error and reports if it finds the key works
how can i get it to look at more then one file, i.e /var/log/message.all *
so it looks in old logs as well
thanks
exit 0 if (isRenderNode(hostname));
my... (4 Replies)
Hello everyone, I need to write a shell script for a file consisting of 3 columns, first column is frequency the second one is power and the last one is number of occurence. I basically need to get the power and the frequency corresponding to the highest number of occurrence number. Below is the... (6 Replies)
Hi All,
I ahve requirement where I want to put the text file in into proper format. I am wondering how can i achieve that:-
Host/Alias Name IP Address Resolved
sinuiy01.infra.go2uti.com 10.240.8.158 N
sinuid20.devtst.go2uti.com 10.240.8.230 N
sinuid21.devtst.go2uti.com... (6 Replies)
Hi All,
I have the below text file from which I have to cut particular section starting from PTR_Security_Rpeorting.cpf to PTR_Security_Reporting_Env93_export.
Report Model............: "D:\Cognos_Publishing\tmp.a2R94KLQec"\PTR_Security_Reporting.cpf
Report Output Script....:... (4 Replies)
Hi,
I need to compare 2 text files with around 60000 rows and 1 column. I need to compare these and write the mismatch data to 3rd file.
File1 - file2 = file3
wc -l file1.txt
58112
wc -l file2.txt
55260
head -5 file1.txt
101214200123
101214700300
101250030067
101214100500... (10 Replies)
Is it possible to replace a line of text within a file while it's closed with a single command or a script? Please show me an example or point me to a webpage that shows an example. The file has this line of text:
LoginGraceTime 100
I want to replace it with the following:
... (2 Replies)
Hi,
I want to compare two columns from file1 with another two column of file2 and print matched and unmatched column like this
File1
1 rs1 abc
3 rs4 xyz
1 rs3 stu
File2
1 kkk rs1 AA 10
1 aaa rs2 DD 20
1 ccc ... (2 Replies)
Hello again,
I have put together a shell script using sed and some shell commands, and it runs pretty well when I am in terminal, but when I save it as a text file and invoke it through the terminal by typing its path, all I get are errors.
Can some one give me some hints as to what I am doing... (13 Replies)
Discussion started by: Paul Walker
13 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)