09-25-2012
This User Gave Thanks to Corona688 For This Post:
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I know this is a total begginer question but what is wrong with this picture. My loop wont loop, it just drops me back to the prompt and gives the error "unary operator expected". Any help would be appreciated.
here it is,
#!/bin/sh
selection=
while
do
cat << MENU
1)List files in... (2 Replies)
Discussion started by: Fokus
2 Replies
2. UNIX for Dummies Questions & Answers
I don't even know if this should go here but I just would like to know what this means:
d0e45878043844ffc41aac437e86b602
I know absolutely nothin' about UNIX, and I found this in a SQL table in a board I run.
Someone please tell me what that is in "normal" mode.
Pardon me for my... (4 Replies)
Discussion started by: daeglin
4 Replies
3. Shell Programming and Scripting
This is probably a really simple problem, but goes easy on me I'm still a newb. The problem I have is that a script (we'll call it script.script) I edited won't run for some reason, I get the error "ksh: script.script: not found"
The location of my script is as follows: /home/users/arkitech
... (3 Replies)
Discussion started by: Arkitech
3 Replies
4. Shell Programming and Scripting
Assume $x equals "".
If I try:
if test -n $x
I get the "Expression syntax" error.
It works in Linux but not in unix bash. In unix bourne I get "test: argument expected" (4 Replies)
Discussion started by: lumix
4 Replies
5. Shell Programming and Scripting
Ok I'm working on this school assignment and I'm sure there is a simple solution to this but I can't find it anywhere. The scenario is that I have to write a script with a menu and stuff like that. One of the options has to be to generate a sales report from a database called items.dat. Items.dat... (4 Replies)
Discussion started by: silveronetrx
4 Replies
6. Shell Programming and Scripting
I am trying to setup to automatically import a series of mysql database files. I am doing manually now and its a royal pain.
All the sql files are sequentially numbered in a format of 4 numbers underscore text with spaces replaced by underscores.
example:
There are 3 databases each setup... (1 Reply)
Discussion started by: dlm1065
1 Replies
7. Shell Programming and Scripting
My first post here....
I have a few years exp with linux distros and some very basic Python..Ive been intent on learning shell scripting the last few weeks. Please excuse my crude efforts.
I am running a program that takes network data containing US city names in plain text. I am TRYING to... (7 Replies)
Discussion started by: dddkkk
7 Replies
8. Shell Programming and Scripting
Hi everyone.
I am new to shell scripting and have been looking at quite a few web pages to try and figure this out, but to no avail.
What I am trying to do is get a value from a text file that contains a paragraph of information.. Something similar too:
Welcome to random script
You are... (1 Reply)
Discussion started by: elemenopee
1 Replies
9. Shell Programming and Scripting
#!/bin/bash
#...
for i in `ls -c1 /usr/share/applications`
do
name="cat $i | grep ^Name= | cut -d = -f2"
echo $name
#...
done
Now inside name as output is present:
while i want only the result of the command.
Ideally i would like obtain that information using only bash ... or... (8 Replies)
Discussion started by: alexscript
8 Replies
10. Shell Programming and Scripting
Hello, I want to run a field from an awk command through a command in bash.
For example my input file is
1,2,3
20,30,40
60,70,80
I want tot run $2 thought the command
date +%d/%m/%y -d"01/01/15 + $2 days -1 day"
and get the output
1,02/01/15,3
20,30/01/15,40
60,11/03/15,80
... (2 Replies)
Discussion started by: garethsays
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)