Hello,
When I run following script
#!/bin/bash
cd ~/directory1
mv `ls -trF | grep -v / | tail -10 ` ~/directory2
works fine with filenames not having any space but runs into issues with filenames that have spaces tried with $file variable still doesnot work. Can someone help me (4 Replies)
Hello~
I'm on AIX version 5 and I believe I have the tcsh shell environment to play in. Can you guys help me with a solution to rename all files that have "eclp" in the filename to "ecl" ? I basically want to rename the files and strip the "p" out.
i.e. original filenames:
... (3 Replies)
Hi
I am having difficulty copying files from one dir to another due to a space in the names of the file with an extension .rtf
There are a group of files and the command am using is
cp `ls -rt /wlblive/home/whiops/ops/RTFs/*.rtf|head -20` /wlblive/home/jamshed
Since the files are... (3 Replies)
I have a text file containing files in a directory structure i.e.
/project/hr/raw/jcpdatav/datav_aug03
/project/hr/raw/jcpdatav/comb8121sep02n
/project/hr/raw/jcpdatav/datav_feb04_ons
/project/hr/raw/jcpdatav/corpsick_jun06
/project/hr/raw/jcpdatav/jcpjoiners200507... (3 Replies)
hi!
i want to rename all files with no extension with the extension DAT.
with this command ls |grep -v "\\." i can list files but i dont know how i am going to rename them..
so
i tried
FILE_LIST=ls |grep -v "\\."
for TEST_FILE in ${FILE_LIST}
do
mv $TEST_FILE... (2 Replies)
Hi all,
I've been tangoing with this one for a couple of days now and I'm still not making any progress.
Basically I'm trying to match three numbers in a string from a text file with matching numbers in a jpeg, and then copying the results to another folder.
Data looks like this:
Model:... (4 Replies)
I'm currently only able to perform some very basic functions, so hope this makes sense...
I have a set of about 27 files that need to be renamed from something like this:
000012ABCDEFGHIJ.XXX.YYY.ZZZ
000078KLMNO.XXX.YYY.ZZZ
000099PQ.XXX.YYY.ZZZ
to something like this:
newa012.abc... (11 Replies)
currently in my directories
$ ls -lrth
total 32K
-rw-r--r-- 1 oracle oinstall 864 Feb 25 16:01 cor_bin_gateway_cnt.sql
-rw-r--r-- 1 oracle oinstall 782 Feb 25 16:01 mer_bin_gateway_cnt.sql
I want to rename files with *.sql to *.mv extension, but when I execute the following
$ mv... (1 Reply)
Hi,
I have a list of filenames in the format with Spaces in the filename.
As an example :
Sample File 1.txt
Sample File 2.txt
Sample File 3.txt.....I have about 100 files like this.
I am trying to create a block of code or use an available command to a) Create a file b) Put in some... (2 Replies)
In the below bash processes substitution, if there are 3 files in a directory /home/cmccabe/medex.logs/analysis.log, the filename variable is set to where these files are located.
The code does execute, the problem is that if there is a renamed file in the output directory below, it gets... (0 Replies)
Discussion started by: cmccabe
0 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)