I suspect the difference arises from the remote ftp code's rename command being implemented two different ways on the remote servers:
system 1
call the equivalent of C:
This would mean invoking the /bin/sh shell on the remote machine, which in turn would see a '#' character as a comment, which requires your escape "\" fix.
system 2
call the mv syscall or the C standard library's rename library call - this never invokes /bin/sh so no shell is called.
Note: /bin/sh can be a completely different object on different machines - it is NOT necessarily the shell that you use to run the ftp script locally.
This User Gave Thanks to jim mcnamara For This Post:
I doin a script in sh.
For example:
i have this code here whereby $5 is a text file. eg file.txt. I wanna rename it to file.txt.tmp. so i use this code below which is correct.
put $5 $5.tmp
But when the ftp transfer is complete i need to rename the file back to $5 which is file.txt.
How do... (2 Replies)
hi friends,
I writing a script to psot dataset to ceratin server.....while doing ftp I have to rename the file while which is in present server like
present :test server
filename data.097878.
ftp server: it sholu be renamed as data.097878.zip
thanks,
The thing is that while... (1 Reply)
Hi All,
I want to rename set of files in the remote server which iam unable to do . i can rename only one file
at a time . for example
ftp $REMOTESERVER
{
rename $NAME1 $NAME2
} is working
whereas
ftp $REMOTESERVER
{
rename $NAME1*.dat $NAME2*.data
} is not working ...... (4 Replies)
Hi
I have following list of files at a path:
01.AR.asset
01.AR.index
01.AR.asset.vf
01.AR.asset.xv
I want to rename all these files as follows:
73.AR.asset.Z
73.AR.index.Z
73.AR.asset.vf.Z
73.AR.asset.xv.Z
Can any body give me a single command to acheive the above results.
... (5 Replies)
How do i rename all the files using a script ?
My server create log files and save them with numbering behind the name. for e.g. daily_20080101.log.0001 and so on ... How do a script and crontab it to remove all the numbering? Please help thanks. (2 Replies)
Greetings,
I am very new to the UNIX shell scripting and would like to learn. However, I am currently stuck on how to process the below sample :
Filename : DOCabcdef24387987ab90d.xml
Pattern "DOC"+any character using and +".xml"
And i want to change the second part of that file (any... (20 Replies)
Hi all,
I wish to know about a simple concept of mv command in UNIX. Is moving a file to a different directory takes longer than renaming it in the same direcotry using the mv command?
The scenerio is that I have to transfer a file from one directory to a location which is regularly scanned... (3 Replies)
Hello All,
I am trying to connect to ftp server and get the files. Also i need to rename the file in other ftp dir.
rename method is not allowing me to rename the file in other dir. When i tried copy command by using net::FTP:FILE then perl says it is not installed.
Can some body help me to... (2 Replies)
Hi,
I have a large series of directories and subdirectories with many jpgs in them. I need to do two things:
1. Create a copy of each jpg found within it's own subdirectory
2. Rename this copied jpg such that apple.jpg becomes apple_m.jpg
I have tried to run the following commands in... (1 Reply)
Hey all, I really need help with some homework I'm having on UNIX. This probably sounds stupid, but I'm being asked to move a file to a specific directory and rename it a specified name in one command. I know how to do it in more than one command, I just can't seem to figure it out using only one... (1 Reply)
Discussion started by: ayylmao12
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)