I'm trying to write a login script to ssh into a cisco switch that will run some command remotely. Similar to this expect script located here:
SSH login expect shell script to supply username and password
However, that script does not work with cisco ios. Anyway know what the best way to... (1 Reply)
Hi,
I'm somewhat new to unix OS
and I'm at course for programmers in my country.
and in the course we learn unix and how to script in unix. of course we just started and we learned only the very basic, but I'm a really computer freak and I looking for a way to make the course easier on all of... (8 Replies)
hi All, is there a way in linux to loop thru all variables sourced?
i have a set configs like
A=100
b=200
c=400
i can add the above lines to a file and source - so that $A will be 100 .. like wise
now when i do a cut -c 1-2 file.txt |sort | uniq -c on a file it returns me
A 100
B 50
c... (1 Reply)
Hello all -
I am to this forum and fairly new in learning unix and finding some difficulty in preparing a small shell script. I am trying to make script to sort all the files given by user as input (either the exact full name of the file or say the files matching the criteria like all files... (3 Replies)
I know there are better ways to do this.
I prefer snmp. I do not have the proper perl modules loaded on the platorm. Snmp isnt loaded on the platform. Telnet is not an option. I need to write an expect script to pull cisco equipment configs.
The following code is executed once I gain... (0 Replies)
Is there an easy way to stack Cisco 2960-S and Cisco 2960X switches? If you have no idea, follow this:
1. Stacking is not supported on switches running the LAN Lite image. All switches in the stack must be running the LAN Base image.
2. In a mixed stack of Catalyst 2960-X and Catalyst 2960-S... (0 Replies)
Discussion started by: Ayaerlee
0 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)