can someone tell me the meaning of this commnad,
If you want to see a grand total of CPU time for a program when it finishes running, you can use the time command. At the Unix prompt, enter:
time java myprog
Replace myprog with the name of the program you are running. The following is an... (2 Replies)
Hello,
If I run a program from within shell, the output is displayed in the command line terminal. Is there a way I can capture that output and choose only the very last string in it to send it to a new file?
Thank you (6 Replies)
I would appreciate any help.
I need to run 'ps -ef | grep 'process', get the process id and kill that process.
I have got this far:
- Get pid using ps -ef | awk '/process/{ print $2}'
after this I'm kind of stuck..
- Use pipe to redirect the output to kill
pid=ps -ef | awk '/bmserver/{... (2 Replies)
Hi,
I have 2 queries
1 .when I run some unix command, I am getting the output of "time" at std output (screen)
for eg
zegrep <pattern> *.v.gz
I almost found the reason but not sure, if the no of files matching *.v.gz is more then I am getting the time command output at the... (5 Replies)
I have set up a bash script to run a long list of things that I need to time. I would like to redirect the output of time to a file. I have set it up like,
echo "Runtimes for servlet 4, 100K structures" > test_times.txt
echo "" >> test_times.txt
echo "runs where N=10" >> test_times.txt
echo... (7 Replies)
Hello Unix Experts!
We are on AIX 6.1 TL6
I am trying to develop a script that does the following:
It should send the output of "df -g /directory/folder" command as an email to a user(someone@company.com)
This is too simple and i can research on how to do it, but it would be great if... (2 Replies)
Hi there,
I'm a newbie to Unix (taking a course in it right now) and I don't know how to do the following in bash:
I need to write a command to display information about the used and free space on the file system, showing only local file systems, and then send the output of the command to... (1 Reply)
I am using UNIX to create a script on our system. I have setup my commands to append their output to an outage file. However, some of the commands return no output and so I would like something to take their place.
What I need
The following command is placed at the prompt:
TICLI... (4 Replies)
I wanted to send an email to the client whenever there is failed record created in a /feed/HR-76/failed folder after processing of feed file.
I can find out with the help of below script that what is the new file created but that file didn't make just 15 minutes before.
... (1 Reply)
Discussion started by: puneetkhullar
1 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)