ehe may i know what are the difference between Unix & Linux, and what are the advantages of having Unix as well as disadvantages of having Unix or if u dun mind i am dumb do pls tell me what are the advantages as well as the disadvantages of having linux as well. thanks (1 Reply)
I've come stuck when I was making sure the hour of the day was not been two times so that the rest of the script could not be executed.
Seems simple enough.
I used the -a to join the two conditions together and it would run if the conditions was t/f ( it is only supposed to run if was t/t).... (3 Replies)
Hi all,
I have one script test.sh for which I pass two arguments. In the same script I need to submit this script in background using nohup. My script like this and it is working in HP-UX os but not Solaris.
#! /bin/sh
if
then
MTR_PID=$$
export MTR_PID
echo "test.sh $1 $2... (3 Replies)
Hi, I hope the title does not scare people to look into this thread but it describes roughly what I'm trying to do. I need a solution in PHP.
I'm a programming beginner, so it might be that the approach to solve this, might be easier to solve with an other approach of someone else, so if you... (0 Replies)
Hi everyone -
I'm trying to start a run of LAMMPS (which takes an input file) with mpiexec on multiple processors. I want to combine this with nohup so that I can log off the node. I've used the syntax below successfully on one cluster, but it doesn't work on the new one I'm using. Any... (0 Replies)
when i have a function definition and function call in my script , i am unable to run my script in background with nohup..
Help me out please..... (3 Replies)
Hello,
I am trying to find a way to send several sequential commands via SSH to a remote box in a single command.
Thoughts so far:
1) Can I put them into a function and call the function within the ssh command?
e.g.
ssh <targetserver> $(functionx)
No - then it calls the function in... (4 Replies)
Hi,
I am running nohup cp & in a shell script.
How do I get a timestamp so I can get a timing of how long the copy took?
Roughly, the script does something like below:
date
nohup cp -rp /files/source /files/target &
date
I am mainly wanting to know how long it took for the... (9 Replies)
Hi All,
Do you have any sample script,
- auto get file from SFTP remote server and delete file in remove server after downloaded.
- only download specify filename
- auto upload file from local to SFTP remote server and delete local folder file after uploaded
- only upload specify filename
... (3 Replies)
For years I have spawned shell scripts with nohup and ampersand and they run whether or not I stay logged in. Recently a client told us that we had to set a keep alive timeout on all of our Redhat 7.6 Linux servers. Our sysadmin set the following parameters in the sshd_config file on all of our... (10 Replies)
Discussion started by: gandolf989
10 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)