I followed the egrep example given in the thread "parse text or complex grep ?". It is exactly what I need...except... how do I insert a blank line after the second line? My exact command is:
egrep 'patt1|patt2' filename
the result is:
patt1
patt2
patt1
patt2
and so on. I would... (2 Replies)
I have a file called alert.log containing the following:
WARNING: received KRVX_OPER_CANNOT_SUPPORT
knlldmm: gdbnm=CROOP
knlldmm: objn=23793
knlldmm: objv=1
knlldmm: scn=5189816456
knllgobjinfo: MISSING Streams multi-version data dictionary!!!
knlldmm: gdbnm=FDROP
knlldmm: objn=49385... (9 Replies)
Hi I've been searching google and have not found what egrep -c means. Does anyone know where I can get a cheat sheet or what that -c means?
thanks,
Linda (2 Replies)
Hi !!! Dear People,
Please help me with the following problem.
consider this output:
Top 5 Timed Events
~~~~~~~~~~~~ Total
Event Waits Time (s) Ela Time
---------------------------- ------------ ----------- -----
CPU time ... (3 Replies)
Hi Guys,
we have a shell script which basically query the Database which retrieves huge data and use the data with "egrep" .
Now there is some data which contains characters like "abc)" and the same is used like below :
"egrep (.+\|GDPRAB16\|GDPR/11702 96 abc)\|$ temp.txt"
now while... (7 Replies)
Is it possible to use the escape sequence:
\r
to match a line feed in grep/egrep?
I want to use a regexp that crosses over two lines, and it does not seem to be possible. (1 Reply)
I have the following script that searches in several files and shows the search results and the matches filename on the screen.
find . -exec egrep -wH "word1|word2" {} \;
the output from the search display as:
file1
word1
word2
I need to show each file search output result on new... (5 Replies)
Can some one help me to print 4th line before the match using egrep or grep command options.
i have a very large file and i need to search the entire file, look for the match (key word) and print 4th line before the matched key word. (9 Replies)
I have a text file which has the content starting with "....."
Not able to filter out lines staring with "....."
Is there anything wrong with grep stagement ??
.....processing table 2 of 2
.....migration process started at 2012-10-04 05:00:28
.....estimated # of rows 169,830... (2 Replies)
Discussion started by: Nagaraja Akkiva
2 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)