09-05-2010
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi
I am using tar utility to take back up on HPUx and SUN 5.8 servers
yesterday i made some change.....in the cronjob
29 23 * * 1,3,5 echo "`date` COMPLETE BACKUP TAR `uname``hostname`">/dev/rmt/0myn
30 23 * * 1,3,5 tar cvf /dev/rmt/0mny <filesystems>
i am confused with the no rewind... (2 Replies)
Discussion started by: Prafulla
2 Replies
2. Shell Programming and Scripting
Hi Guys,
Need help. I am using ISQL inside a shell script.
Is there a way to set the value of shell script variable from inside the ISQL code. I do not want to write the results from the SQL to an output file.
Please let me know.
Regards,
Tipsy. (3 Replies)
Discussion started by: tipsy
3 Replies
3. Shell Programming and Scripting
Colleagues
when i types python in console my system shows following error message
python: error while loading shared libraries: /usr/lib/libdb.so.3: ELF file OS ABI invalid
Any solution.
My machine is Fedora Core 6
jaganadh (4 Replies)
Discussion started by: jaganadh
4 Replies
4. Shell Programming and Scripting
Hi,
I am trying to set environment variable on a remote machine. I want to do it by running a shell script
Here's what I am doin
rsh <remote-hostname> -l root "cd /opt/newclient; . ./setp.sh"
In setp.sh, I have
#############################
cd ../newlib;
export... (1 Reply)
Discussion started by: eamani_sun
1 Replies
5. Shell Programming and Scripting
Hi All-
First time using iSql.
I have 4 query files - some have more than 1 line of sql statements
After a bit of research it appears I can just use the -i command and specify the input file.
Questions:
Does it matter that there are multiple queries in each file? Do I need to have... (3 Replies)
Discussion started by: Cailet
3 Replies
6. Shell Programming and Scripting
for index in `find /technologies -name *.jar | grep "/lib"`; do echo "$index"; done
sometimes its throwing error saying
find: paths must precede expression
Usage: find
but i execute same in cmd prompt its working (1 Reply)
Discussion started by: crackthehit007
1 Replies
7. Shell Programming and Scripting
Hi,
I am new to shell scripting.I tried adding an entry to the path variable like below
export PATH=$PATH:/opt/xxx/bin
But am getting an error invalid identifier /opt/xxx/bin
Can someone tell me the error above and correct me .
Thanks and Regards,
Padmini (2 Replies)
Discussion started by: padmisri
2 Replies
8. Shell Programming and Scripting
Hi ,
I am having one TCL TK script , I am setting some variables in the GUI TK interface
set DI 1
set MODELS_PATH /a/d/path
but I want to make ksh shell understand the variables when I am running TK script
I tried to do like this
set a
but it is not working
... (1 Reply)
Discussion started by: kshitij
1 Replies
9. Shell Programming and Scripting
Hi All,
I'm trying to write an menu driven program to automate some functions which involve loging to multiple hosts. The hosts can differ for every use, so I thought I would use an config file to get the hostnames. Now I need to set those values in the config file to environment variable to... (6 Replies)
Discussion started by: arun_maffy
6 Replies
10. Shell Programming and Scripting
The following is part of a larger shell script
grep -v "Col1" my_test.log | grep -v "-" | awk '$5 == "Y" {print $1}'
instead of printing, can I set set $1 to a variable that the rest of the shell script can read?
if $5 == Y, I want to call another shell script and pass $1 as a... (2 Replies)
Discussion started by: guessingo
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)