Does any one know how to get a recursive directory listing in long format (showing owner, group, permission etc) without listing the files contained in the directories.
The following command also shows the files but I only want to see the directories.
ls -lrtR * (4 Replies)
I want to set the crontab job for one of my SIEBEL database to refresh it on alternate sundays. Is there anyway I can do it through cron please ?
If not whats the alternative ? :confused:
Thanks in advance. (6 Replies)
how would i list all files, directories and exectable files in my directory?
is there anyway to find out what date a file was created?
Thanks!! (2 Replies)
Hi,
How to get count of number of sundays in month in unix shell script ..
ideally i need 2 get last sunday of month
so i used cmd:
for eg: for june:
cal 06 2011 | tail -2 | head -1 | cut -d" " -f1
hoowever above is wrking for month whose sundays are max=4 but not fr months... (4 Replies)
Hi Am Using Unix Ksh
I have input
DATE1=01/11/2012
DATE2=10/12/2012
need output as count of all sundays between these two dates
for examples Sunday count between DATE1 and DATE2 is
5
Can anyone help me... (11 Replies)
Hi Am using unix Ksh
Datecalc and --date functions are not working
have two input variables as
DATE=01/12/2012
DATE1=23/12/2012
Need output as
no of sundays = 4
Can anyone help me pls :( (2 Replies)
Hi All,
Could you please help to resolve my following issues:
Problem Description:
Suppose my user name is "MI90".
i.e. $USER = MI90
when i run below command, i get all the processes running on the system containing name MQ.
ps -ef | grep MQ
But sometimes it lists... (8 Replies)
I am looking for some scripting help. I need to add a time stamp to a file name.
I will append data to a file, and want to add to the file name a time stamp of the previous Sundays date. Any takers? (1 Reply)
Discussion started by: sswagner8839
1 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)