Thank you so much
My .for code looks like this...
for each text file here I have to replace inp and outfile every time, if many files means its time consuming
if it was shell I would have done
So I am just wondering some provision to use bash variables in place of inpfile and outfile in .for code
Hi! I have a simple question about using a for loop.
I'm trying to open up all the zip files in the currect directory with ark, but I am getting the error "bash: syntax error near unexpected token `for $i ; do ark $i ; done ;
I looked in the info pages for bash, but I can't seem to figure... (2 Replies)
Hi,
I have a .test file which has:
#!/bin/ksh
export TEST_FLAG=1
In the test1.ksh i have:
#!/bin/ksh
. .test
echo $TEST_FLAG
When i execute the test1.ksh its showing the value as 1.
But if i refer the same variable in another script, the value is not 1.
Basically, I need to have... (1 Reply)
Hi,
I use AIX (ksh) and Linux (bash) servers. I'm trying to do scripts to will run in both ksh and bash, and most of the time it works. But this time I don't get it in bash (I'm more familar in ksh).
The goal of my script if to read a "config file" (like "ini" file), and make various report.... (2 Replies)
I would like to write a for loop that does the following:
I have a file called X.txt and other files called 1.txt,2.txt, .....,1000.txt.
I want to substitute the 6th column of the file X.txt with 1.txt and store the output as X.1. Then I want to do the same with X.txt and 2.txt and store the... (1 Reply)
Hi,
I have a loop running until a variable L that is read previously in the full script. I'd like to grep some information in an input file at a line that contains the value of the loop parameter $i.
I've tried to use grep, but the problem is nothing is written in the FILE files. It seems grep... (5 Replies)
Hi all ,
i want to pass multiple files as input to a for loop
for i in file1 file2 file3
do
some awk action < $i >> $i.out
done
but im getting error in that for loop is the way i use to pass files to awk using for correct and
2.we can directly pass multiple files to awk as... (7 Replies)
Hi ALL,
I always use du command for analyzing diskusage to housekeep a filesystem.
Can somebody tell the where first row filesize resides?
bash-3.2# df -gt /tmp
Filesystem GB blocks Used Free %Used Mounted on
/dev/hd3 16.50 10.01 6.49 61% /tmp
bash-3.2#
bash-3.2# pwd... (6 Replies)
I have a bash loop that waits for a single key press, then does $something depending on what $key is pressed before refreshing the screen with updated data. The problem I have is that the script will store additional key presses and chain them together causing the screen to redraw and the script... (1 Reply)
I have the following while loop that I put in a script, demo.sh:
while read rna; do
aawork=$(echo "${rna}" | sed -n -e 's/\(...\)\1 /gp' | sed -f rna.sed)
echo "$aawork" | sed 's/ //g'
echo "$aawork" | tr ' ' '\012' | sort | sed '/^$/d' | uniq -c | sed 's/*\(*\) \(.*\)/\2: \... (3 Replies)
Cope sample1: test.sh
i=0
echo " Outside loop i = $i "
while
do
i=$(( $i + 1))
echo "Inside loop i = $i "
done
echo " Out of loop i is : $i "
When run output :
Outside loop i = 0
Inside loop i = 1
Inside loop i = 2
Inside loop i = 3
Inside loop i = 4
Inside loop i = 5
Inside... (8 Replies)
Discussion started by: Adarshreddy01
8 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)