Hi, Sorry for the dumb question but I can't seem to figure this one out. I want to write an if condition that basically checks if my variable is in a file. So far I have the following:
if ]
then
do something
else
do something else
fi
So essentially if the grep returns something then... (3 Replies)
How can I use a variable that has the conditions for the if statement stored in it?
my test script
condition=" || || "
if "$condition"
then echo "true"
else echo "false"
fi
output
$ ./test2.sh
./test2.sh: line 3: || || : command not found
false (2 Replies)
Hi friends,
I'm having a bit of a problem using shell variable in an awk if statement.
Please note that i'm using -v option as listed in many forums but I still don't get it working. Here's my code. Kindly help as I've gone crazy trying to work this out :wall:
#!/bin/bash -xv
... (4 Replies)
Please help me with this:
I need to compare two values in if condition in shell script but its goes always to else condition:
TIME_CHECK=PM
TIME-CLOCK=PM
if ; then
echo "You have access!"
else
echo "ACCESS DENIED!"
fi (5 Replies)
if
then
echo "Entry Valid : ${x_oug}"
else
echo "Entry Invalid : " 0
fi
In the above code the 3rd line is not working... it does not print anything
I tried following as well .. but no luck!
echo "Entry Valid : ... (13 Replies)
In AIX, why is it variable VAR becomes true in the condition despite VAR was unassigned and not equal to 1?
In Linux, it was traced as an error as VAR is not declared as variable and expecting an integer as argument.
one.sh
VAR=1
if ; then
echo "One"
fi
if ; then
echo "Two"... (5 Replies)
i have this code
for i in `cat sql_output.txt`
do
-- some script commands
done
sql_output.txt has 1 column with employee_ids
If the sql_output.txt is null then the do loop should not execute.
How can i implement this.
for i in `cat sql_output.txt`
If i is null or empty
then ... (5 Replies)
Guys,
Please help me on the below
sample.cfg
var=NULL
sample.sh
#!/bin/sh
. /sample.cfg
if ;then
1 st command here
else
2 nd command here
fi (3 Replies)
Hi,
I'm trying to automate part of a script which uses awk to grab out some lines of a log file based on certain fields matching. For example, my log file looks something like the following (but 1000s of lines):
1 Tom 123 abc 345
2 Dick 345 abc 678
3 Harry 567 abc 345
4 Tom 345 cde 345... (3 Replies)
Hi Gurus,
I have a command to assign value based on input value.
current condition is "if pattern matches "case", then assign "HOLD" else "SUCC"right now, I need to add one more condition (variable name is VAR).
the condition is "if pattern1 matches "case", then assign "HOLD" else if... (2 Replies)
Discussion started by: ken6503
2 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)