Hello expert,
What I want is to determine whether the script is called from CRON or it is executed interactively?
I tried the following but no luck:
#!/bin/ksh
cronID=`pgrep -x cron`
GPID=`ps -ef -o ppid,pid | grep " $PPID$" | awk '{print $1}'`
if ; then
echo I am being run... (15 Replies)
Hi,
when I execute some simple commands on my solaris system, I am getting the following warning message:
Could anybody tell me what could be the reason
Ex:- If I give the command,
which ls
Warning: cannot determine current directory
... (15 Replies)
Hi All,
I've searched through the forum for a solution to this problem, but I haven't found anything. I have 2 script files that are in different directories.
My first script, let's call it "/one/two/a.sh" looks like this:
#!/bin/sh
IN_DIR=`dirname $0`
CUR_DIR=`pwd`
cd $IN_DIR... (4 Replies)
My n00b question:
I am trying to write a script that I can place on a flash drive and then move from computer to computer and install a file, which is bundled with the script. (ie the script is at /Volumes/FlashDrive/Folder/Script, the file is at /Volumes/FlashDrive/Folder/File)
So far I have... (1 Reply)
how could I use shell script to determine which CPU structure
because I found that I compile my program under Itanium base that cannot run on the PA-RISC base
but PA-RISC program can run on Itanium base
i would like to use shell script to know which CPU structure it is,how could i do
thanks (1 Reply)
Hi all
So I am thinking my inability to cope with math is bogging me down here so Im asking for help.
I want to determine how long a user has been logged on for by using the date and who commands to determine the time they have been logge don.
My problem is that I keep getting the wrong... (2 Replies)
Need help with the script, I am trying to include this script as part of kickstart profile.
based of the host's IP address, in this case if the host is IP starting with 10.10.3.* or 10.10.6.*, I will be pushing appropriate routing file from my web server.
I validate host IP from nslookup.
... (3 Replies)
Discussion started by: bobby320
3 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)