10 More Discussions You Might Find Interesting
1. UNIX for Beginners Questions & Answers
In Bash shell - the ps -ef shows only the /bin/bash but the script name is not displayed ? Is there any way to get the script names for the process command ?
--- Post updated at 08:39 AM ---
in KSH (Korn Shell), my command output shows the script names but when run in the Bash Shell... (3 Replies)
Discussion started by: i4ismail
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2. Shell Programming and Scripting
So I'm trying to pass certain json elements as env vars and use them later on in a script.
Sample json:
JSON='{
"Element1": "file-123456",
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}'
(part of the) script:
for s... (5 Replies)
Discussion started by: da1
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3. UNIX for Dummies Questions & Answers
Options::
A)$shell
B)echo $ bash
C)echo $ O
D)$ O (1 Reply)
Discussion started by: raghugowda
1 Replies
4. Shell Programming and Scripting
I do not claim to be an expert, but I have done things with scripts that whole teams of folks have said can not be done. Of course they should have said we do not have the intestinal fortitude to git-r-done.
I have been using UNIX actually HPUX since 1992. Unfortunately my old computer died and... (7 Replies)
Discussion started by: awk_sed_hello
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5. Shell Programming and Scripting
#!/bin/bash
declare -a dirs
index=0
for dir in `ls -d */`
do
dirs=$dir
echo $index. $dir
index=`expr $index + 1`
done
Its giving me distorted output:
c.sh: dirs=1/: No such file or directory
0. 1/
c.sh: dirs=11844/: No such file or directory
1. 11844/
c.sh: dirs=12819/: No such... (3 Replies)
Discussion started by: uunniixx
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6. Shell Programming and Scripting
Hi All,
I am in Bash Shell and Running A script that contains Exit statement in that in last ( to return to sh shell after executing) But it is not coming to sh shell after the script is excuted.
How to return to sh shell from bash shell through a script. (8 Replies)
Discussion started by: saurabh84g
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7. Shell Programming and Scripting
(reposting this with a better title)
Cool. I played with scripts at home over the weekend. Come to find out not working on other shells. I have linux/bash at home, but now I'm trying on Solaris csh.
How would I write the following script for Solaris C shell?
----------
#!/bin/bash... (0 Replies)
Discussion started by: ajp7701
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8. Shell Programming and Scripting
Hi,
I have only bash on my system. And I want to run a C shell... Is there a way for that? (3 Replies)
Discussion started by: HSN
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9. Linux
How do i get rid of those blue & other colors in bash, i just want to have the text all the same, I use PuTTY and the colors up against my black backdrop and green test does not go well/ (1 Reply)
Discussion started by: BG_JrAdmin
1 Replies
10. Shell Programming and Scripting
Hi All,
I am using HP-UX. Here ksh is configured as a default shell. How can i change this to bash.
And please let me know of any freely available X-Terminals through which i can connect to Unix system from Windows.
Regards,
Vijay Hegde (2 Replies)
Discussion started by: VijayHegde
2 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)