hey guys
having some trouble figuring this out.
my program is supposed to take a name of a directory as a command line argument and change the filenames inside that directory to lowercase.
what i dont get is how you access that directory and go thru all the files and change the filenames... (1 Reply)
i have many files with extention filename.ASN_ERROR~ at a path. I want to move these files to another path and change extension to .ASN
There are more then 80,000 files so i cant use manual commands
muneebr (5 Replies)
Dear All,
I have some thousands of files in a folder and i need to change those file names without opening the file (no need to change anything in the file content, need to change the file name only). The filenames are as follows:
Myfile_name.1_parameter
Myfile_name.2_parameter... (6 Replies)
I have lot of files whose names are something like the following. I want to change the name of all the files from 'npt02' to 'n02'.
npt02-z30-sr65-rgdt0p50-dc0p01-16x12drw.tpf
npt02-z30-sr65-rgdt0p50-dc0p01-8x6drw.back
npt02-z30-sr65-rgdt0p50-dc0p01-8x6drw-bst-mis.xy... (5 Replies)
I have written a csh script that changes the name of file from src to dst.
I am getting the error below:
TESTAmvfiles
DONE TESTAmvfiles
set: Variable name must begin with a letter.
The csh script is:
#!/bin/csh
#... (0 Replies)
I have file names as shown and want to change the name to have only the first four numbers.
/home/chrisd/Desktop/nips/nips_2013/5212-learning-feature-selection-dependencies-in-multi-task-learning.pdf
/home/chrisd/Desktop/nips/nips_2013/5213-parametric-task-learning.pdf... (3 Replies)
I have a series of files as follows
file-1.pdf
file-2.pdf
file-3.pdf
file-4.pdf
file-5.pdf
file-6.pdf
file-7.pdf
I want to have the file names with odd numbers
starting from an initial number, for example 2000.
The result would be the following:
file-2001.pdf
file-2003.pdf... (9 Replies)
I want to change the name of several files within a folders (directory) and subdirectories in OS X. If I only wanted to change file names within the directory I guess I would use:
rm photo*.jpg picture*.jpg
I have lots of subdirectories, is there a way of getting the file changes for all... (5 Replies)
Hi I have a list of files :root@L28mustang:/var/log/exim4/2017/Jul2017_Blast_BC07# ls -lrt | grep mainlog
-rw-r----- 1 Debian-exim adm 3636932 Jul 8 06:25 mainlog.3.gz
-rw-r----- 1 Debian-exim adm 919512 Jul 9 06:27 mainlog.2.gz
-rw-r----- 1 Debian-exim adm 7655054 Jul 10 06:25 mainlog.1... (1 Reply)
Discussion started by: anaigini45
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)