Hi I have to eliminate all characters between ^ and a space in a file.
Following lines -
Test ^ H^@^@^@^@^@^@^B^VDM-BM-$|M-^_M-F^AM- File1
Test^H^@^@^@^@^@^F^A^X^@^SM-s^TM-3M-G^A File2
Should be printed as below
Test File1
Test File2
I used sed '/^/,/ /d' command, but it is not working.... (1 Reply)
Hi all, I made a C++ program in dos (in dev-C++) and uploaded it on Solaris box. On opening that file with 'vim' editor i found that there is some extra new lines after each written code line. I tried to find out is the file is in dos or in unix format, with 'file' command,and i got "<file-name>.h:... (4 Replies)
I am trying to show how many users are logged into one of my systems. Using who -q it gives me a user count, but some users are logged in multiple times.
Is there any easy parameter that I can use to ignore/eliminate these duplicates??
Thanks (9 Replies)
Hi Folks,
I am writting a shell script for general purpose use....
i have created a function like below:-
largest_file()
{
clear
tput cup 20 30
echo please enter the full directory path where you want to search:-
tput cup 21 30
read lr_choice1
tput cup 22 30
echo please... (3 Replies)
Hello,
I am using HP-UX B.11.23 U ia64 2591592275 unlimited-user license
I am trying to write a sh script on my own system to pass string of word as one parameter
The format of the string will be the same
But the content after : will be changed each time
If you manage to have this as $*... (7 Replies)
I have a file like
1 0
2 0
3 1
3 0
4 0
6 1
6 0
. .
. .
. .
i need to eliminate values 3 0 and 6 0 in the same way there are such values in the whole file....but 3 1 and 6 1 shuld be present... (2 Replies)
Hello, I'm having trouble to read two txt files, they have employee records line by line, I need to do the reading of a file that is old and compare it with the new base in the new file, deleting the lines in old file, then add the new file data from the old file and write to the database manager.... (5 Replies)
Hi,
I have a large flat file from host without delimiter. I'm transforming this file to a csv file using statements like
# Row 03: Customer / field position 3059 +20
WOFABNAM=substr( $0, 3059, 20 );
and deleting the trailing whitespaces before and after with that
sub( /^ +/, "",... (4 Replies)
Good morning,
I need some help with getting rid of newlines with the output from a MYSQL query and putting the information into the right format that I need.
Here is the script as it is today:
#!/usr/bin/perl
my $uda = system("/opt/incontrol/mysql/bin/mysql -u root -ppassword... (2 Replies)
Experts ,
Below is the data:
--- Physical volumes ---
PV Name /dev/dsk/c1t2d0
VG Name /dev/vg00
PV Status available
Allocatable yes
VGDA 2
Cur LV 8
PE Size (Mbytes) 8
Total PE 4350
Free PE 2036
Allocated PE 2314
Stale PE 0
IO Timeout (Seconds) default
--- Physical volumes ---... (5 Replies)
Discussion started by: rveri
5 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)