Hi,
I accidentally deleted a big directory with all its sub-directories and bunch of source code files which I have been developing for about 2 years... What will I do now, how can I retrieve my files, directory hierarchy back ???
If anyone, please HELP ! ! ! ... (4 Replies)
i have the following problem:
use shell script:
Two directories have to be searched for files havin the same name.
then delete these files from one of these directories.
the directory names have to be accepted as command line arguments.
what i have done till now is:
1. run a loop... (1 Reply)
Hello Gurus,
I want to delete only empty files (files with 0 bytes) at once from the local directory. Rightnow I need to go through all the files one by one manually and check the empty files before deleting them. Is there any unix command that finds and deletes empty files in a directory?... (5 Replies)
I have a directory full of text data files.
Unfortunately I need to get rid of the 7th and 8th line from them all so that I can input them into a GIS application.
I've used an awk script to do one at a time but due to the sheer number of files I need some kind of loop mechanism to automate... (3 Replies)
Hi Guys,
I want to know wheather it is possible to delete directory not files,
Example:
In one directory there are 10 dirs and 100 files but my req is to delete only dirs not file
Wheather it is possible ? (13 Replies)
I have written a script that deletes files:
Requirement: i need to delete the files and to know how many files are deleted i.e the count of files and even i need to display when the started time of deletion and the ending time of deletion. I need to display these two times.
script:
... (2 Replies)
Hi,
I am using the command find /apps/qualdb/gpcn/scripts/cab_outbound/archive -name 'z*' -mtime +28 -exec rm {} \;
in unix command prompt
for deleting the files in my unix system under the specfied folder. It was succesfull.
But when i running this command inside a shell script name... (2 Replies)
I have a file inside abc/def/ghi directory. let say a.txt
I need to delete this a.txt from abc itself.
I have tried
ls /abc/def/ghi | xargs rm -r
its saying
rm: a.txt non-existent
also tried rm -rf /def/ghi
but in vein. plz help :) (2 Replies)
Hi Friends,
I am new to this , I am working on AIX system and my scenario is to retrive the files from remote system and remove the files from the remote system after retreving files. I can able to retrieve the files but Can't remove files in remote system. Please check my code and help me out... (3 Replies)
I have a qnap TS259 that is running ubuntu. Have successfully setup back scripts that are initiated by cron.
I would like to create a couple scrypts that would operate on the recycle bins for both drives. Just want to be able to run the script manually that would walk through both directories... (13 Replies)
Discussion started by: mackconsult
13 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)