What is syntax for String concatenation?
I have $1 as directory.
$var is some variable value
'/' String value.
How do I have to concatenate if I have to run utility -
util $1 followed by '/' followed by $var
There is no space between these three. (2 Replies)
How can I do this:
date = 4 -----------> 04
Month= 3-----------> 03
I wish to make a varibale named Var1 which will hold the value of current date and month value as:
2 digits for date.
2 digits for month.
So finally var1 should hold value as 0403 --- MMDD (11 Replies)
Hi,
I have a problem with concatenation text files.
I have a directory, say 'foo'
Inside this folder, I have many sub folders, say 'oof1, oof2 .... oof20'
Each oof directory has a number of text files inside it. I need to
concatenate all the text files in oof directories within foo...... (1 Reply)
I have a somewhat bizarre problem when trying to concatenate lines in a file.
Using cat file.txt | sed -e :a -e '/$/N;s/\n/ /;ta' the output in file.txt should go from
1
2
3to 1 2 3 instead I only get the last line or 3.
I find that if I open the file in gedit and hit delete in front of every... (7 Replies)
I need to concatenate all lines of a file into 1 line.
input file containing lines like
001123456400001234563 107 001578000000000000000000000000000000000000 0000000021600
001123456912345600003 107 001578000000000000000000000000000000000000 0000000992000
i am using command
echo `awk... (6 Replies)
Hi,
when I echo the values of two variables that have been set for example:
export FRUIT1=ORANGE
export FRUIT2=APPLE
echo $FRUIT1
ORANGE
echo $FRUIT2
APPLE
as expected but when I echo the following:
echo ${FRUIT1}AND{$FRUIT2}
I was expecting to get:
ORANGEANDAPPLE
but... (6 Replies)
I have a script which is migrated from AIX to Linux & now while running it is no able to concatenate string values
The string concatenation step under while loop is not displaying desired result
Please find below the piece of code:
while read EXT_FILE ; do
EXT_FILE=$EXT_FILE.ext.sent
echo... (7 Replies)
Hi,
I have the following reports that get generated every 1 hour and this is my requirement:
1. 5 reports get generated every hour with the names "Report.Dddmmyy.Thhmiss.CTLR"
"Report.Dddmmyy.Thhmiss.ACCD"
"Report.Dddmmyy.Thhmiss.BCCD"
"Report.Dddmmyy.Thhmiss.CCCD"... (1 Reply)
Hi,
I have the following reports that get generated every 1 hour and this is my requirement:
1. 5 reports get generated every hour with the names "Report.Dddmmyy.Thhmiss.CTLR"
"Report.Dddmmyy.Thhmiss.ACCD"
"Report.Dddmmyy.Thhmiss.BCCD"
"Report.Dddmmyy.Thhmiss.CCCD"... (1 Reply)
Discussion started by: Jesshelle David
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)