today i started the LFS book (version 4.0).
Basically i am using slackware 9.0 to try and install a new linux completely from source on another partition.
Now i took the book's recommendations and created a user called lfs so i wouldn't have to do the stuff as root, and i have got the new LFS... (4 Replies)
I am writing an expect script but am getting a bad interpreter: permission denied error.
I don't think the error has anything to do with expect itself, I think I am missing something in how I start the file. For instance, when I run the file under the expect directory it works:
cd... (7 Replies)
Hi,
Iam trying to run a gmake command and have the latest version of Gnu in my redhat linux system.
I need to execute the following steps;
---> chmod +x utils/*
---> ./utils/AllCodeManagerFix
---> gmake LINUX
Iam able to do the chmod command but when I run the second command I get... (2 Replies)
Here is a puzzler.
To start, let me say that I've done a search on this issue and it is definitely not related to line endings being encoded in windows returns.
I get this error when I run SOME perl scripts. I have a script called hello_world.pl. I do $cp hello_world.pl new_hello_world.pl... (0 Replies)
Hi Gurus,
I am new to scripting and needs your help in expect script used for telnet. I wrote a simple script as
#!/usr/bin/expect-5.43 -f
spawn telnet localhost 2233
expect "password:"
send "secret\r"
send "i data.cnbc.com\r"
send "exit\r"
expect eof
When I am trying to execute... (2 Replies)
Hi All,
I'm not confortable in writing script, can someone can help me, when I run that script below i found this error code : -bash: ./script.sh: /bin/sh.: bad interpreter:
Here is the script
for i in *
x=${i##*.}
z=$(perl -e 'print time;')
t=$(echo $z-$x|bc)... (12 Replies)
Hi. My name is Caleb (a.k.a RagingNinja) form the whited00r forums. (Whited00r makes custom firmware for iOS devices).
I have been learning and creating simple shells scripts. I have been recently using VIM for Windows or using VirtualBox to run the UBUNTU OS within VirtualBox to create my shell... (2 Replies)
Hi,
I accidentally did this:
wadhwaso@nxsdgd01 deps]$sudo rpm -e --nodeps glibc-2.5-107.x86_64
error: %postun(glibc-2.5-107.x86_64) scriptlet failed, exit status 255
and since then I am not able to run any command on this server except 'cd'.
I always get the following error:
$ ls... (6 Replies)
Hi all
I'm hoping this is just me being a muppet, has anyone come across this problem before?
I am writing an application that uses sqlite3 and I have created a database using it -
sqlite3 muse.db
SQLite version 3.6.20
Enter ".help" for instructions
Enter SQL statements terminated with... (2 Replies)
I keep getting this error and I am not sure why.
-bash: ./p4: /bin/ksh^M: bad interpreter: No such file or directory
First I run my makefile and this works fine:
goodmain: main.o
gcc -o goodmain main.o
main.o: main.c
gcc -c main.c
Then I want to limit my output so I... (11 Replies)
Discussion started by: cokedude
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)