Issue with shell script: not detecting file properly
The following script is meant to check the presence of a file - called filename0.94.tar.gz - and uncompress it:
The output is however:
This script is run in the same location where filename0.94.tar.gz is. Why does the script not detect the file and uncompress it? Manual uncompression works as intended.
Hi I am trying to create a shell script that will
look for a contracthead file first and if the contract head file does not exist on day1 exit script.
Now on day2 if contracthead exists or not run the script uploading files in order
such as contract line then contract contact
so the... (2 Replies)
Hi,
I created the following shell script file :
bash-3.00$ more Unlock_Statistics1.sh
#!/usr/bin/ksh
ORACLE_SID=prsal02; export ORACLE_SID
NLS_LANG=AMERICAN_AMERICA.AL32UTF8; export NLS_LANG
sqlplus -s /nolog << EOF
connect / as sysdba ;
set serveroutput on size 1000000;
execute... (1 Reply)
I'm new at this and frustratd because I know this must be simple but here goes. I'm trying to write a script that will give me the percentage of a particular field over multiple text files.
Each day I have around 1500 files that are generated. Each file has around 100 lines in it. The lines... (3 Replies)
Hi,
I am executing a shell script which takes a string as a parameter.
The scipt should validate the string and create the directoy with the name of specfied string.
The following is the specified command and its parameter.
test.sh "abc abc"
The shell script is not able to identify... (4 Replies)
Hi GURU's,
I'm using a Shell Script to send email's as an attachment.
I'm Storing the email address in a table and catching in a variable.
MAILLIST=`noarg sqlplus -s $OraUsr << EOF
set heading off
set feedback off
set echo off
SELECT email_ids
FROM tpemail_table
WHERE... (9 Replies)
I am using tcsh
what could possibly be a problem, when using crontab to invoke a shell script. ?
The script has the read, write and execute permission to all users. And the script works as expected while executing it in stand-alone mode.
Is there a way to trace (like log) what error... (9 Replies)
I need a way to reliably detect a USB storage device from a bash script. I know how to use 'lsusb' to list the USB devices - but then how can I match a device listed in 'lsusb' output to an actual disk device? Is there some way to map one to the other?
Any help appreciated. (3 Replies)
Hello,
i have below shell script to process ftp get from server and create file list afte finish.
this shell scipt has 6 parameter input.
unfortunately, it is only working to get the file and terminated before creating file list.
please help.
thanks,
#!/bin/ksh
## example usage :... (3 Replies)
Hello Friends,
I had enabled the audit and configured for sysadmin user alone in audit config file. but the audit starts logging for root user alone.
Attached the conf file. I want the aduit to record only for sysadmin activities..
need your expertise and help in solving the issue. (1 Reply)
Hi Experts,
I have this script to count the number of files based on prefix and suffix values.
#!/bin/ksh
file_date=$1
prefix=$2
suffix=$3
file_count=$(ls -l /db/day_file/{$prefix}*${file_date}*{$suffix})
The files in the directory /db/day_file are as below.
20170501
20170501... (7 Replies)
Discussion started by: nalu
7 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)