I'm sitting here late at night, reading linux from scratch, and I come to this part:
http://lfs.osuosl.org/lfs/view/stable/chapter06/creatingdirs.html
my question to you, the all knowing unix.com'ers is this: what's the difference between using the install command as they do, and using the... (1 Reply)
Hi,
I look for a script to create 150 directories :
d000
d001
d002
...
...
d149
would you help me please ?
I think it would be
for i
mkdir d$i
Many thanks.
PS :
#uname -a
AIX fserver 3 5 0050691A4C00 (2 Replies)
Is there ant way to increase max number of folders in the directory from the 32766:
Problem UFS:
shell>mkdir mmm
mkdir: mmm: Too many links
But there are no links, just folders.
shell>ls | wc -l
32766 (3 Replies)
Hi, please help me with this small script
#!/bin/sh
curdir=`pwd`
n20=$curdir'/n20/'
msat=$curdir'/n20/msat/'
if
then
mkdir $n20
fi
if
then
mkdir $msat
fi
for a in 30 40 50 60 70 80
do (4 Replies)
Hi all, i am new to Linux and need some help.
I used the command: mkdir super
Directory super is created
When i try to change to this directory using: cd /super
I get: bash: cd: /super: No such file or directory
when i use: rm super
I get: rm: cannot remove 'super': Is a directory
What... (5 Replies)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
Do the procedure, which if there are 5 parameters then it creates 4 directories with names of 4 parameters, in... (2 Replies)
Howdy,
Puttering around in unix, and read this in the mkdir man page:
"The mkdir utility creates the directories named as operands..."
What does this mean, i.e. as operands?
Many thanks,
DN (2 Replies)
Hi, I used "mkdir job{0001..10}" do get directories. Now I want to create directories with a variable, for exemple "mkdir job{0001..$a}". When a=5 I get the directory "job{0001..5}". What have i to change to get job0001,...,job0005 :/
Thx for ur help :) (1 Reply)
hi linux expert
what is a difference between:
mkdir test and mkdir ./test
and also
if ( -e /test ) then and if ( -e ./test ) then
thanks in advance
Please use icode or code tags next time for your code and data (1 Reply)
Discussion started by: abdossamad2003a
1 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)