i have a file like this
aaaa bbbb cccc
aaa aaaa
aa cccccccccccccccc
aaaaaaa aaaa aaaa
i want to enclose this lines with double quotation:
"aaaa bbbb cccc"
"aaa aaaa"
"aa cccccccccccccccc"
"aaaaaaa aaaa aaaa"
any idea? (preferably without using sed)
thanks in advance... (3 Replies)
Hi,
I am at a point in my script where I defined the number of the command line parameter I would like to set a variable equal to:
parameter_number=14
I would then like to set a variable equal to the correct parameter:
variable=$parameter_number
The issue here is that {} is required... (2 Replies)
I have the following string:
31-01-2012, 09:42:37;OK;94727132638;"Mozilla/5.0 (Linux; U; Android 2.2.1)";3G;WAP;I need a script which is counting the occurrence of semicolons ( ; ) but exclude the ones from the quotation marks.
In the string given as example there are 8 semicolons but the script... (3 Replies)
I need help extracting a column in a file separated by quotations. I would like to extract the first column of data and write it to a flat text file. EXAMPLE of data:
"c6e181396a1100ba19c53a6757a845c4","2012-05-18","email"
"70879000563753bb9051b4ab8df43ac4","2012-05-18","email"... (5 Replies)
I have a csv file with 3 columns. Fields are comma delimited and strings are enclosed with quotation marks "". About 40% of the time, the line of values will start a new line thanks to carriage return characters within a string.
Example:
"apple","banana","orange"
"pineapple","grape","straw... (6 Replies)
Hey guys, my first post on UNIX Forums(much overdue IMO)!
I've got this bit of code that doesn't seem to be working correctly for an Android app I'm working on:
"screen -S gmod1 -p 0 -X stuff " & "" & command.text & "`echo -ne '\015'`"""
Basically it types command.text(variable determined... (4 Replies)
tail -n +7 1.txt |head -n -2|awk '{print "sql", $1,"-c groom table " $5 ,"versions"}'
sql DB1 -c groom table T1 versions
sql DB2 -c groom table T2 versions
sql DB3 -c groom table T3 versions
but i want out should be
sql DB1 -c "groom table T1 versions"
sql DB2 -c "groom table T2... (3 Replies)
Discussion started by: rocking77
3 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)