I am trying to make a simple script in which i take input from shell and then forward the value to
nawk (BEGIN).
but when i run below mention script so it give no output.
echo "Enter TRUNK GROUP:"
read TGR
cat /omp-data/logs/5etr/080422.APX | nawk -F"|" -v P=$TGR '
BEGIN {
TG=P;... (1 Reply)
I need to set up a strange system through which an arbitrary command is sent to a number of different servers (well, actually, VPS accounts). We have a command "vpass" that "passes" a command from the root level to resident VPS accounts. Suppose I wanted each VPS to do some trivial thing, like... (3 Replies)
Hi, I had to create a new thread as the old thread had to much of confusion
I have two files shashi.sh and py.py
I want to pass a variable from shashi.sh to py.py. How do i achieve that ?.
shashi.sh
export X=12
echo "$("pwd")"
echo "$X"
exec python py.py "$(X)"
py.py... (0 Replies)
Hello,
I have a file with 4 columns.
An arbitrary example is shown below:
a Tp 10 xyz
b Tq 8 abc
c Tp 99 pqr
d Tp 44 rst
e Tr 98 efg
Based on the values in col 2 and col 3, I will execute another program.
I have been running this:... (5 Replies)
I am trying to execute a copy command via shell script. However, on occassion, 2 or more files need to copied. How do I code for the multiple arguments? Does it matter how the files are delimited?
Example: I have a script to copy files from 1 dir to another called duplicate.csh
In most... (1 Reply)
I have a script that kicks off several processes in the background and stored their pids in a variable as follows:
PID_DUMP_TRAN=$PID_DUMP_TRAN" "$!
so I then have a list of pids
If I echo $PID_DUMP_TRAN I get back a list of pids e.g. 8210 8211 8212
However I then want to kill all these... (5 Replies)
I have a shell program that calls another shell program
the following code works
. chkTimeFormat.sh "10/9/12 17:51:19:783."|read c
but when I am passing the the time in a variable like in the code below, the shell chkTimeFormat.sh is not returning proper value
time="10/9/12... (9 Replies)
Hello All,
May i please why my shell variable is not getting passed into awk script.
#!/bin/bash -vx
i="1EB07C50"
/bin/awk -v ID="$i" '/ID/ {match($0,/ID/);print substr($0,RSTART,RLENGTH)}' /var/log/ScriptLogs/keys.13556.txt
Thank you. (1 Reply)
Discussion started by: Ariean
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)