when i run in dos for example:
C: ls /temp
ls: cannot access /temp: No such file or directory
but when i run
C: ls \temp
windriver backup remotebackup
also when i run
C: ls temp
windriver backup remotebackup
The problems that i have all developpers scripts was written first like this... (0 Replies)
Hello ;
I have a problem running some script on dos .
when i run :
C: ls /temp
ls: cannot access /temp: No such file or directory
but when i run
C: ls \temp
windriver backup remotebackup
also when i run
C: ls temp
windriver backup remotebackup
The... (4 Replies)
what does the '+' sign stand for on the output of ls command on cygwin?
-rw-------+ 1 milhan None 146783 Jun 19 12:10 schedule.pdf
-rw-------+ 1 milhan None 320 Aug 15 17:14 current.txt
-rw------- 1 milhan None 24576 Dec 28 2008 fdfd.txt (2 Replies)
Hi
I want to export DOS output of find command in Excel.
However I want information to be in different column and not in same.
I am using this command
set /p String_to_search='Enter String to search !'
set /p File_to_search='Enter File to search !'
findstr /N "%String_to_search%"... (0 Replies)
Hi Everyone,
When i finish running
# echo `psql -t -U root databaseA -c "select a, b from book"`;
i get the output
107275 | 14 107301 | 2 107446 | 6 107820 | 77 107929 | 101
Would like to have the result like:
107275 | 14
107301 | 2
107446 | 6
107820 | 77
107929 | 101 (7 Replies)
Hi, although I am not expert in bash, so please forgive me if this is silly, I think that this is strange:
I have this command:
find . -type f -print0 |xargs -0 grep -i -e 'some rexp'
and it works fine. But when I create a bash script (on cygwin) to run this command, there is no output !!!... (3 Replies)
Hi guys,
I have some echo scripts and awk scripts like these:
echo "some text" > output1
.
.
awk '{....}{print}' input > output2Both output1 and output2 are saved with unix END Of Line, then,
is there an option to include within echo command and awk command to save the output as DOS END Of... (3 Replies)
I have set up a bash script to run a long list of things that I need to time. I would like to redirect the output of time to a file. I have set it up like,
echo "Runtimes for servlet 4, 100K structures" > test_times.txt
echo "" >> test_times.txt
echo "runs where N=10" >> test_times.txt
echo... (7 Replies)
Hey All,
Quick question...
I'm writing a short script to check if a continuous port is running on a server.
I'm using "ps -ef | grep -v grep | grep processName" and I was wondering if it was better/more reliable to just check the
return code from the command or if its better to pipe to... (12 Replies)
cmd()
{
echo " "
echo "$(whoami)@$(hostname):$(pwd)# $*"
results=`eval $*`
echo $results
}
I want to get the eval $* 's return value and pass it to a new variable $val, and get "eval $*" 's the ... (7 Replies)
Discussion started by: yanglei_fage
7 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)