I'm creating a script that counts the number of users currently online, then records that in a file called "log.txt" along with the time. Everytime the script is ran, the script appends the "log.txt"
this is what I have:
who|wc|cut -c6,7>>log.txt
date|cut -c12-24>>log.txt
After running... (5 Replies)
Hi all ,
Iam trying to append a ' to the end of the $1 and $2 in the bellow example :
awk '{print "exec upload" ,$1,$2,$3 "\ngo"}'
so the output would be something like this :
exec upload '444042 ','444042 ','919841037265'
i am getting :
exec upload 444042 ,444042 ,919841037265
... (2 Replies)
Is there a betterway to cut certain columns in everyline based on positions.
Basically, I have a largefile and eachline is of 1000 characters and I need to cut the characters 17-30, 750-775, 776-779, 780-805
while
do
fptr=`cat $tempfile | head -$i | tail -1`
... (4 Replies)
Hi,
I'm using awk in HP-UX machine which does not support systime(), strftime(). So to get the date time I was using :
seq 1 100000 | awk ' "date +%Y%m%d%H%M%s" | getline curtime; print curtime }'
However the above code gets the date only once, next time it is not updated. For... (2 Replies)
Hi,
I have script1.sh on 3 servers. I want to collect output report generated by them to a single server and append all the reports. Please tell me how can i do this? (2 Replies)
Dear Friends,
Sorry for this basic request. But I just started learning Ksh recently and still I am a newbie in this field.
Q: I have files on one server and the date format is 20121001000009_224625.in which has year (yyyy) month (mm) and date (dd). I have these files on server A. The task... (8 Replies)
I need to connect to a ftp server-1 from linux server-2 and copy/get a file from server-1 which follows a name pattern of FILENAME* (located on the root directory) and copy on a directory on server-2. Later, I have to use this file for ETL loading... For this I tried using as below
/usr/bin/ftp... (8 Replies)
I have 3 servers A, B, C and server B is having some files in /u01/soa/ directory, these files i want to copy to server C, and i want to run the script from server A.
Script(Server A) --> Files at Server B (Source server) --> Copy the files to Server C(Target Server).
We dont have RSA key... (4 Replies)
Hi guys,
So i am in server1 and i have to login to server 2, 3,4 and run some script there(logging script) and output its result. What i am doing is running the script in server2 and outputting it to a file in server 2 and then Scp'ing the file to server1. Similarly i am doing this for other... (5 Replies)
Hello:
I have some text output, on SunOS 5.11 platform using KSH:
I am trying to parse out each string within the () for each line.
I tried, as example:
perl -lanF"" -e 'print "$F $F $F $F $F $F"'
But for some reason, the output gets all garbled after the the first fields.... (8 Replies)
Discussion started by: gilgamesh
8 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)