Hi,
i would like to retrieve (only retrieve, not execute) a previous command which i executed on the command prompt. I tried the 'up arrow' key, but its not working. Instead,it showed me some funny characters. I searched around and i found the way to do it was using the way below. Several... (5 Replies)
Discussion started by: new2ss
5 Replies
2. Forum Support Area for Unregistered Users & Account Problems
Hello,
Apologies for not following the forum rules. I will follow it from now on.
What I need now is to get the previous date in PERL.
Today is 07/01/2010...and the prev date is 06/30/2010.
Could you please show me the (localtime) syntax of how to write this so it works in all... (3 Replies)
Hi
I need to get the previous 5 minutes from the currnet time as given below. Please help.
Current time : date +%d-%m-%Y_%H-%M
output : 16-05-2012_15-05
I need the previous 5 minutes of the above output ,
Required output:
16-05-2012_15-04
16-05-2012_15-03... (4 Replies)
I have hundreds of files to process. In each file
I need to look for a pattern then
extract value(s) from next line and then
search for value(s) selected from point (2) in the same file at a specific position.
HEADER ELECTRON TRANSPORT 18-MAR-98 1A7V
TITLE CYTOCHROME... (7 Replies)
I want to remove commands having no output. In below text file.
bash-3.2$ cat abc_do_it.txt
grpg10so>show trunk group all status
grpg11so>show trunk group all status
grpg12so>show trunk group all status
GCPKNYAIGT73IMO 1440 1345 0 0 94 0 0 INSERVICE 93% 0%... (4 Replies)
I have requirment to get last date of previous month and the first date of previous 4th month:
Example:
Current date: 20130320 (yyyymmdd)
Last date of previous month: 20130228 (yyyymmdd)
First date of previous 4th month: 20121101 (yyyymmdd)
In my shell --date, -d, -v switches are not... (3 Replies)
Hello,
I am new to this forum so any assistance would help.
I am currently trying to develop a script that extract all data from a log file with has the previous day's date.
$ <root@aixtest3> /var/log > more sudo.log
May 13 10:52:10 aixtest3 local2:notice sudo: tbrath : TTY=unknown ; ... (14 Replies)
Hi,
I am trying to extract data where first field unique value and 4th field of next row is grater than first row 4th field.
input data is a below:
7035719974,20-jul-2016 07:42:51,07:42:51,074251,1
7035719974,20-jul-2016 07:43:57,07:43:57,074357,2
7399206761,20-jul-2016... (2 Replies)
Discussion started by: rramkrishnas
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)