10 More Discussions You Might Find Interesting
1. UNIX for Beginners Questions & Answers
The below command works in the terminal interactively but not as part of a bash script. I though maybe I needed to escape the "$dir" so it isn't interpreted literally, but that's not it. Thank you :).
interactively in terminal
dir=/path/to
new=$(ls "$dir"/*.csv -tr | tail -n 1) && echo... (6 Replies)
Discussion started by: cmccabe
6 Replies
2. Shell Programming and Scripting
Hi,
maybe I'm asking a VERY dumb question, but would anybody out there tell me, why this f****** script won't work if executed as a cronjob, but works fine if executed from a shell prompt?
#! /bin/bash
set PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
date >>... (3 Replies)
Discussion started by: beislhur
3 Replies
3. Shell Programming and Scripting
I ran this script yesterday (in the background)
/usr/bin/nohup myfilelocation/myscriptname.sh &
the script worked perfectly.
i ran it today (also in the background) and just sat there. So i killed it and ran it normally and it worked perfectly.
Anyone suggest why it just sat there and... (8 Replies)
Discussion started by: twinion
8 Replies
4. Shell Programming and Scripting
Hi, I've got a Bash backup script I'm trying to run on a directory via a cron job nightly. If I ssh in and run the script manually it works flawlessly. If I set up the cron to run evertything is totally messed up I don't even know where to begin.
Basically the path structure is
... (6 Replies)
Discussion started by: wyclef
6 Replies
5. AIX
Hi
Script not getting executed via cron but executes successfully when executed manually. Please assist
cbspsap01(appuser) /app/scripts > cat restart.sh
#!/bin/ksh
cd /app/bin
date >>logfile.out
echo "Restart has been started....." >>logfile.out
date >>logfile.out
initfnsw -y restart... (3 Replies)
Discussion started by: samsungsamsung
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6. Shell Programming and Scripting
dear list,
i've just write a simple php script to add user to my iptables, but some times it works and it dosn't work,, here's my script for my adduser.php
<?php
exec('/var/www/html/backup.sh');
$hash = "# $_POST\n";
$ip = "-A INPUT -p tcp -m tcp -s $_POST -d 10.10.105.18 --dport 8080 -j... (2 Replies)
Discussion started by: ridwanfi
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7. Shell Programming and Scripting
Hello,
So my knowledge of bash scripting is not that great and I have been trying to solve this problem on my own for awhile to no avail.
Here's the error I get when running it with an OS that uses bash 3.2.x:
testagain.sh: line 10: *-1: syntax error: operand expected (error token is... (2 Replies)
Discussion started by: forkandspoon
2 Replies
8. Shell Programming and Scripting
I'm trying to use unison from bash on windows with cygwin. I don't know if this is a cygwin question, bash question or unison question. Since I always get reprimanded by the cygwin mailing list for assuming it is a cygwin problem, I'll assume it is a bash question.
The following commands work... (7 Replies)
Discussion started by: siegfried
7 Replies
9. Shell Programming and Scripting
dear friends,
i want to make a bash script that can be executed by many people simultaneously. do you have any idea to make it?
there will be many dependent-variables(which is input from people) in the scripts.
i am thinking about a random temporary file that created by the bash script each... (4 Replies)
Discussion started by: jimmbp
4 Replies
10. Shell Programming and Scripting
hi guys,
i have a problem.
a week ago i made a successful crontab that execute bash scripting daily, it worked well
but now, it doesn't work at all, in the mail i have:
"
/home/jimmy/cha/scripts/cekpderr
produced the following output:
lagi jalan
/home/jimmy/cha/scripts/cekpderr:... (6 Replies)
Discussion started by: jimmbp
6 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)
