Hi Friends,
How can I search all files in all slices on a unix system for a particular string within the file.
e.g search string 'oracle'
Thanks (4 Replies)
Hi all,
Lets say I have 3 files a.txt and b.txt and c.txt.
a.txt has the following text
====================
apple is good for health
b.txt has the following text
====================
apple is pomme in french
c.txt has the following text
====================
orange has citric acid... (1 Reply)
Hello,
I want an one line command that brings me back all the files in a folder that contain 4 specific words anywhere inside them.
I want to use find,xargs and grep. for example i know for one word the command would be:
find . | xargs grep 'Word1'
But i don't know for 4 specific words... (13 Replies)
say I have a file named phones
in that file every line is like that
lastname^firstname^phone
how can I make a program in cshell that searches for a specific string
in phones and echos the result (if found) like that:
lastname1
firstname1
phone1
------------------
lastname2
firstname2... (8 Replies)
Hi all,
I need UNIX command that would give me all files without the string "4R" anywhere in the file. I have about a hundred files in my directory, and I need to list all files wihtout the string "4R" anywhere. Can anyone help me please? Thank you.l (4 Replies)
Hi Guys,
I want to search the content of all the files (of a particular type like .txt)
in a directory for a specific string pattern. Can anyone help me?
Thanks (7 Replies)
Hi I have multiple files in a folder and one file which contains a list of files (one on each line). I was to search for a string only within these files and not the whole folder. I need the output to be in the form
File1<tab>string instance 2<tab> string instance 2<tab>string instance 3... (6 Replies)
Hi,
I have following files in a directory with '.meta' extension, which have data in follwoing patterns. i need to print data from these files in below metioned format. please provide a script for this solution.
file names:
TEST_HISTORY_MTH.meta
AB_TEST_1.meta
cat... (2 Replies)
Hi,
I have a requirement to create a shell script(tcsh) that finds all the files in a directory having the file name containing date format "YYYYMMDDHHMM" and extract the date time part ""YYYYMMDDHHMM" for further processing.
Could you please have any idea on this.
trades_201604040000.out... (6 Replies)
I have been running a program mseed2sac using the following command
cd IV
find . -type f -exec /swadmin/mseed2sac '{}' \;
The problem is that I end up with a lot of files in directory IV.
Instead I would like to select the designator HHZ, create a
directory IV.SAC and all the files output... (11 Replies)
Discussion started by: kristinu
11 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)