10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi,
Could you please let me know, why we should not use '.' in move command, if we use it, is it something wrong.. Please share the details on it.
/home/rahualux/emp.csv /home/rahualux/details/employee_files/.
Or other example for mutlipile files
/home/rahualux/*.csv... (3 Replies)
Discussion started by: rahualux
3 Replies
2. UNIX for Dummies Questions & Answers
I have one file like this:
NEW
/ifs/SQL_Backups3/SQL_SharePoint1
NEW
/ifs/SQL_Backups/SQL_SharePointThis can be easily sorted by the following command:
cat file| sort -k3,3nBut I have another file like this:
/Pool0/local/Benchmark
/Pool0/local/CRAD
/Pool0/local/crdhw/espresso_scratch1... (5 Replies)
Discussion started by: newbie2010
5 Replies
3. UNIX for Dummies Questions & Answers
Hi,
I have few doubts regarding "sudo" command. It acutally allows access to other commands as a different user. It stands for "superuser do".
Now, we execute a command as
sudo su - oracle
Can you please tell me what does it do actually, thank you. (6 Replies)
Discussion started by: Dev_Dev
6 Replies
4. Shell Programming and Scripting
hi
please tell me the usage of prealloc command. (1 Reply)
Discussion started by: 2002anand
1 Replies
5. UNIX for Dummies Questions & Answers
Hi all,
Can you please tell me the command, with which one can know the amount of space a specific directory has used.
df -k . ---> Displays, the amount of space allocated, and used for a directory.
du -k <dir name> - gives me the memory used of all the files inside <dir>
But i... (2 Replies)
Discussion started by: abhisheksunkari
2 Replies
6. HP-UX
Hello
We have used Glance command to check Cpu Uage , bit new to Glance command ,
HP-UXdev # glance
B3692A GlancePlus C.03.71.00 18:21:16 nedunix2 9000/800 Current Avg High
--------------------------------------------------------------------------------
CPU Util S SN NU | 43% 59%... (1 Reply)
Discussion started by: lukas_pise
1 Replies
7. AIX
How to monitor the IBM AIX server for I/O usage, memory usage, CPU usage, network usage, storage usage? (3 Replies)
Discussion started by: laknar
3 Replies
8. HP-UX
how can I find cpu usage memory usage swap usage and
I want to know CPU usage above X% and contiue Y times and memory usage above X % and contiue Y times
my final destination is monitor process
logical volume usage above X % and number of Logical voluage above
can I not to... (3 Replies)
Discussion started by: alert0919
3 Replies
9. UNIX for Dummies Questions & Answers
Hi All,
I am using cksum command in s script to check integrity of set of files transffred across the network.
What are the advantages and disadvantages/limitations of this command?
Is the byte count return reliable?
What are the other alternatives I could use for this purpose?
... (2 Replies)
Discussion started by: Axis99
2 Replies
10. UNIX for Dummies Questions & Answers
Hi, i would like to determine how many shell scripts are in a directory. Someone recommended me the file command, but i don't know how to use it in that way.
anybody???
Thanks!!! (8 Replies)
Discussion started by: kfad
8 Replies
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)