How to extract a portion of a string from a full string using unix.
For example:
Say source string is = "req92374923.log"
I want only the numeric portion of the string say "92374923" how to do that in Unix. (2 Replies)
Hi,
How to strip a portion of a file name from behind...Say for Eg..i have a file name like aaaaa.bbbbb.Mar-17-2007
i want to remove .Mar-17-2007...is there a one line command which can give this output...
Thanks
Kumar (5 Replies)
Hi All
I have 3 files as listed below and highlighted in bold the portions of the filenames I need to extract:
TOS_TABIN218_20090323.200903231830
TOS_TABIN219_1_20090323.200903231830
TOS_TABIN219_2_20090323.200903231830
I tried
source_tabin_name=`echo $fname | sed 's/_.*//'`
but I... (6 Replies)
Hi All,
I posted something similar before but I now have a another problem.
I have filenames as below
TOP_TABIN240_20090323.200903231830
TOP_TABIN235_1_20090323.200903231830
i need to extract the dates as in bold. Using bash v 3.xx
Im trying to using the print sed command but... (11 Replies)
Hi Gurus,
I've some sample of my log information as shown below.
-> Processing ABCD123456
This is tp version 372.04.57 (release 700, unicode enabled)
This is R3trans version 6.14 (release 700 - 05.03.09 - 08:28:00).
unicode enabled version
R3trans finished (0000).
Warning: Parameter... (1 Reply)
I have 2 text files say file1.txt and file2.txt . Some of the sample records for file1.txt were shown below:
XXXXX12345XXXXXXX12 3456789YYYYY
XXXXXXXXXX12345XX123457485YYYYY
XX12345XXXXXXXXXX123454658YYYYY
for file2.txt, some of the sample records were shown below:
... (5 Replies)
I have a script which currently uses a file containing a list of directories as an argument. The file is read in to an array, and then the array is iterated in a for loop.
What I would like to do is cut off the first few directories of the directory path (they won't exist on the server where the... (5 Replies)
Hi Gurus,
Would like to seek some help on how to extract a portion of string from log's output as shown below.
Sample of raw data:
piece handle=/test123/disk_dump/test123/df0_cntrl_PCPFCI20120404_68498 tag=TAG20120404T180035 comment=NONE
piece... (13 Replies)
I have a awk file which consists of the follwoing code in file select.awk :
/xxx/ {
time = gensub(/xxx \*\*\*(.*)/, "\\1", "g")
printf("%s\n",time)
next
}
and an input file with the following file file.txt :-
xxx ***Wed May 2 18:00:00 CDT 2012
AAA AAAA AAAA xxx... (4 Replies)
Hi,
I am trying to remove lines once a string is found till another string is found including the start string and end string. I want to basically grab all the lines starting with color (closing bracket). PS: The line after the closing bracket for color could be anything (currently 'more').... (1 Reply)
Discussion started by: Dabheeruz
1 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)