The value of the IFS variable determines which characters are used to split the result of variable expansion. $movestr expands to the string "cp -R -p ...." and you have modified IFS so that it only splits that string on newlines. For that command to work properly, you need the shell to split on spaces as well .. perhaps tabs. In short, using the default value of IFS. Alternatively, you could use eval. The best solution, in this case, however, is to not use a for loop; use a while read loop and don't mess with IFS (at least not until you've had a chance to study its effects further).
You can confirm that this is the problem by storing the old value of IFS and restoring it before the line: $movestr
I have written a script to run on UNIX server. When I tested, it always hanged on after "date +"%D %T: XXXXXX script started." part. Then it wouldn't go further. UNIX server gave me one error message. I used the same code in another script. It works fine. I think the major problem may be in... (3 Replies)
Howdie everyone...
I have a shell script RemoveFiles.sh
Inside this file, it only has two commands as below:
rm -f ../../reportToday/temp/*
rm -f ../../report/*
My problem is that when i execute this script, nothing happened. Files remained unremoved. I don't see any error message as it... (2 Replies)
Hi everybody:
I usually use Mandriva distro (in my laptop), and I have made some scripts. These scripts work correctly but now, in other computer which is installed Ubuntu don't work, and I have this error message:
The script is:
.....
echo "Your option is:"
echo
read option
case... (1 Reply)
Hi there. I'm new to scripting in bash shell and I have this problem.
I'm trying to make a script that returns the greatest common divisor of two integer numbers according to Euclid's algorithm...
Here is, what I've done:
#!/bin/bash
m=$1
n=$2
while
do
if ; #line 8
then m=$m-$n... (1 Reply)
I have a script which uses below for loop:
for (( i = 0 ; i <= 5; i++ ))
do
echo "Welcome $i times"
done
But when I run the script, it gives error message:
Syntex Error : Bad for loop variable
Can anyone guide to run it?
Thanks in advance. (10 Replies)
Hello,,
Im verry new to scripting and have some problems with this script i made..
What it does:
It checks a directory for a new directory and then issues a couple of commands.
checks sfv - not doing right now
checks rar - it checks if theres a rar file and when there is it skips to... (1 Reply)
Hi all,
I need some help. my shell script doesn't work especially in the loop.
#!/bin/sh -xv
export ORA_ADMIN=/oracle/home/admin
export ORACLE_SID=ORA_SID
cat ${ORA_ADMIN}/param_alert_log.ora | while read MSG
do
#echo $MSG
#echo "tail -400... (8 Replies)
i have this script and when i ejecute it, the console tell me this " sintax error line 41 unexpected element "}" "
is the sintaxis ok?
#!/bin/bash
if ;then
{
exit 0;
}
if ; then
{
sudo /etc/init.d/apache2 start;
sudo /etc/init.d/mysql start;
php5 &
nautilus... (3 Replies)
hi,
i am trying to run this script.the name of script is final.sh
after i run it:
#./final.sh &
i grep the command
# ps -a | grep bash
and i see more then one processes runing 3!!
Please use code tags
how can i solve this problem?
my target script must always run in... (8 Replies)
I am trying to run a script to make a simple modification to a number of similar files. The sed works, but after it runs and the differences are displayed, the script does not read ans to start a renaming script if the user answered Y or y.for i in "$@"
do
sed -f myfile.sed $i >$i.new
diff... (2 Replies)
Discussion started by: wbport
2 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)