Hi All,
How to we get to know when say a new log file is created on an Unix box.
I need to trigger a process(say a script) when the new log file is created.
But i need to know by some means or generate a trigger when a new file is created????
Something like when we receive a new mail we... (1 Reply)
Hi All,
I am checking for a empty input file to do some further action , but I am getting exit status 0 in both the cases , for empty and non empty file both.
The value of $? is coming 0 in if part also and else part too.
#!/bin/ksh
if ]; then
echo "data"
# exit 0
echo "$?"
else... (4 Replies)
Hi
i have aix 5.3 operating system, and i am trying to do ssh without passwd, when i tried to create a rsakey, it produces empty file as an output, how can solve that problem? why it is giving empty output file, i tried with different user, situation same,.i have restarted sshd server. .ssh... (2 Replies)
I have a local linux machine in which the files are dumped by a remote ubuntu server. If the process in remote server has any problem then empty files are created in local machine. Is there any way using perl script to check if the empty files are being created and delete them and then run a shell... (2 Replies)
1. The problem statement, all variables and given/known data:
When looking for corefiles, include any file with core in its name. (Some UNIX/Linux systems add the PID of the process that created the core to reduce the chances of overwriting an already existing core file that might be needed. The... (6 Replies)
Hi All
I use solaris 9 and just realised my opt volume has grown to 99%. How can I find out which file was created on the opt volume for it to have grown to 99%? Which command should I use since I can't go through each individual file to look at the date the files were created.
Regard (3 Replies)
Hi,
I have used expdp for datapump. The .dmp file is created by the "oracle" user.
my requirement is to make a zipped file of this .dmp file.
What i am trying to do is change the permissions of this .dmp file from 0640 to 0644 and then do a gzip and zip it. Is there any way i can change... (3 Replies)
hi,
i have a script wrriten where there is a temporary files getting created:
echo "From:" ${usrname}@apps.mc.xerox.com>mail_txt
it was working from a long time but now there is a error creating while creating this temporary file. here is the error log for this:... (15 Replies)
Discussion started by: lovelysethii
15 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)