08-31-2015
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
I ask this question since sometimes i run a time-consuming ftp in foreground and forget to use nohup ftp.sh & to put this work background and can still running after i log off.
Assume this ftp task have run 1 hour, and still 1 hour time to end,
i don't want to abort the ftp, first, i use ctrl+Z... (3 Replies)
Discussion started by: stevensxiao
3 Replies
2. Programming
Hi All,
The scenario is like this:
There is a process say "A" which create a child process say "B" if some condition is true and process "A" terminates. "B" invokes some C program say "C" using 'execl' function. The job of program "C" is to keep polling the server until the server will be up.... (2 Replies)
Discussion started by: ranjkuma692
2 Replies
3. Shell Programming and Scripting
hi
what is the shell programming code to know the number of processes currently running on the machine & information about those processes.
Another one is the configuration and usage of the UNIX file system?
requesting all for help.
thanks (1 Reply)
Discussion started by: moco
1 Replies
4. UNIX for Dummies Questions & Answers
Hi All,
I am new to unix. Can anyone tell me "How to check the status of the processes running for the current user?"
Regards,
Ravindaran S (1 Reply)
Discussion started by: ravind27
1 Replies
5. Shell Programming and Scripting
When I typed in ps -a I get this:
PID TTY TIME CMD
31799 pts/3 00:00:00 vim
31866 pts/3 00:00:00 vim
And to check who is currently logged in, I type who
Felix Whoals
Tada Whoals
Lala Whoals
How can I get the user process for all current users who logged in?? I think I need to combine... (14 Replies)
Discussion started by: felixwhoals
14 Replies
6. UNIX for Dummies Questions & Answers
Hi all,
When I issued command ps -ef|grep Vinay in a UNIX machine,
I got the following
Vinay 22491 1 255 Jun 18 ? 294248:53 -sh
Vinay 26628 1 255 Jun 18 ? 294237:33 -sh
Could you tell me what all process is running ? Please explain each of the fields.
Thanks... (4 Replies)
Discussion started by: coolbhai
4 Replies
7. UNIX for Dummies Questions & Answers
I have been having some trouble trying to get some code working, so I was wondering...what system calls are required to execute a different program from an already running process? (1 Reply)
Discussion started by: Midwest Product
1 Replies
8. Shell Programming and Scripting
Hi,
'ps -ef' returns output of the following format
UID PID PPID C STIME TTY TIME CMD
root 17573 1 0 Sep12 tty6 00:00:00 /sbin/mingetty tty6
hpsmh 18150 14864 0 Sep12 ? 00:00:00 /opt/hp/hpsmh/sbin/hpsmhd -DSSL -f /opt/hp/hpsmh/conf/smhpd.conf
root ... (3 Replies)
Discussion started by: ysrini
3 Replies
9. Shell Programming and Scripting
I'm trying to create a ksh script to do the following:
1) Ask the user what process they want to search for.
2) Have the script read the input as a variable and use it to search for the process.
3) Display the current time & date, the working directory of the process, and finally display the... (6 Replies)
Discussion started by: seekryts15
6 Replies
10. Shell Programming and Scripting
All,
1.What is the unix comand used for all current running process (Including All current running processes Parent ->child->subchild process)
2.If child and subchild processes are running then what is the unix command to kill parent and its all child subchild processes in UNIX.
Kindly... (7 Replies)
Discussion started by: skp
7 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)