How can I perform size check of any character file(which switch)?
For example: I have to perform certain actions if file size is not zero. How can I do that?
Is this syntax fine?
if test ! -z $filename
then
fi (2 Replies)
Hi All,
I am in small problem..
i have one script which transfers some big files to my ftp usign normal command like put ....
my problem is how to check whether my file have been transferred successfully on ftp or not...
i know only inside ftp we have option like 'size' command which... (2 Replies)
I have following script on AIX/KSH
if ] ; then
echo "filename exists and is > 0 bytes"
else
echo "filename does not exist or is zero length"
fi
It is not working. What is wrong here??? (3 Replies)
I want to write a batch job (ksh) with the following requirement
we have file feeds coming to our system from other team,
if the file size is greater than expected then we dont need to process the file for the day
and need to archive the file and send email notification to the manager saying... (5 Replies)
if ; then
cp /tmp/testfolder/*.* ~/new/logs/
else
echo "No files today"
exit
fi
The problem is this doen't work when there is more than 1 file. Please tell me how to
take the latest file and check the size of the file in a directory (1 Reply)
Hi,
Following script work fine:
#!/bin/bash
FILE=$1
if ; then
echo Yay
else
echo Boo
fi
But I would like to add another condition that if FILE... (3 Replies)
Hi,
I am trying to write a script which will check if the filesize is grather than 0 KB, compress the file and send to the email list else if the file size is zero KB don't send a mail update the log
if
then
echo "Validate the file" | mailx -s " There are errors : " ${EMAIL_LIST}
else... (5 Replies)
Discussion started by: mora
5 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)