assume i have a file with content:
the output is:
how should we use any awk, sed, perl can do this task, means to extract the uniq prefixes from the start and stop prefix.
Thanks
Jimmy
Last edited by Don Cragun; 12-16-2016 at 07:33 PM..
Reason: Add CODE and ICODE tags.
Hi
Input File:
export NAME='AA.BB.CC'
export FILE=1.2.3
AA.BB.CC
export MAIL= '1.3.3'
export char='XX.YY.ZZ'
Out File
export NAME='AA/BB/CC'
export FILE=1.2.3
AA.BB.CC
export MAIL= '1.3.3'
export char='XX/YY/ZZ'
Only the Lines which have export and have alphabets after =... (9 Replies)
hi
In the foll example the whole text in a single line....
i want to extract text from IPTel to RTCPBase.h.
want to use this acrooss the whole file
Updated: IPTel\platform\core\include\RTCPBase.h \main\MWS2051_Sablime_Int\1... (7 Replies)
I]hi all
i am in confusion since last 2 days :(
i posted thraed yesterday and some friends did help but still i couldnt get solution to my problem
let it be very clear
i have a long log file of alkatel switch and i have to seperate the minor major and critical alarms shown by ! , !! and !!!... (6 Replies)
I have a file:
chromosome1:436728
chromosome2:32892
.....
chromosome22:23781
I just want to get the number, not the prefix "chromosomeX", so I want to remove all the prefix ahead of the numbers. How can I do that?? Thanks!!! (PS: give me some very simple command so that I can understand... (4 Replies)
OK, now I just feel plain silly asking this. But I am very much a beginner at compiling and installing Unix software, so...
When setting the prefix, do you also have to specify the directory the files reside in? For example, lets say I am installing cURL in /usr/local
Would I set the prefix... (1 Reply)
Hello All,
I have a file in the following format. I want to extract the date(020090930, 020090929) in the string "STPAGE020090930" and "STPAGE020090929" and prefix it to all lines below them. The output must be put into a new file.
STPAGE020090930
xyzz aalc... (3 Replies)
In unix when I run rm command, it asks for file removal confirmation e.g.
rm netmail_log.csv
rm: remove netmail_log.csv (yes/no)? n
But if i prefix backslash to rm it does not ask for confirmation. Does anyone know what backslash does to command or shell ?
e.g.
\rm netmail_log.csv (1 Reply)
I was trying to install apache using the following url
Compiling and Installing - Apache HTTP Server
when I try to start http it prompts me the following error
oracle@localhost httpd-2.4.4]$ su -c '/usr/local/apache2/bin/apachectl -k start'
Password:
/usr/local/apache2/bin/httpd: ... (1 Reply)
Hi,
I want to add prefix and suffix on line# 205 using SED or AWK and want to change on the same file without creating new file.
This command will be used in the bash script
Am using Bash shell
Regards
Nayaj (3 Replies)
In the bash below which does execute I am trying to extract the contents of ${id} is 1234, as ${id} stores the variable that changes each time.
After the path is removed the contents of ${id} are stored in pref, so they can be used in the output. Currently I am not able to extract the 1234 in the... (6 Replies)
Discussion started by: cmccabe
6 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)