hello
I want to do a pattern match for string in the if statement, but I am not sure how to use regex inside the if statement.
I am looking for something like this:
if {2,3} ]; then
.....
....
...
fi (7 Replies)
Hi!
I want to made a program that will generate code like this:
{{Navedi XYZ
|avtor=XYZ1
|naslov=XYZ2
|leto_izzida=XYZ3
|zalozba=XYZ4
|kraj=XYZ5
|isbn=XYZ6
|cobiss_id=XYZ7
}}
from input like this:
<b> ODGOVORNOST............. : <a... (5 Replies)
Hi,
I'm trying to write a routine to parse a file that contains data that will be read
into arrays. The file is composed of labels to identify data types and arbitrary
lines of data with the usual remarks and empty new lines as is common with
config files.
The initial pass is built as so:... (3 Replies)
hi everyone
suppose my input file is
ABC-12345
ABCD-12345
BCD-123456
i want to search the specific pattern which looks like
-
in a file so i used this command
cat $file | awk ' { if ($0 ~ /-/) { print } }'
so it gives me the result as
ABCD-12345
BCD-12345
BCD-12345
... (31 Replies)
Hi can you suggest in this regard
The sample.txt conatins the data
name lines type
sam 12 txt
sam 24 xls
sam 36 pdf
ram 32 txt
ram 45 sxls
ram 58 word
sam 92 jpeg
sam 21 gif
sam 22 ltf
from the data i need to sum all line... (5 Replies)
Hi all,
Can someone tell me what's the (g)awk equal of this simple regex to find ip addresses in urls:
egrep "^http://{1,3}\.{1,3}\.{1,3}\.{1,3}(:{1,5})?/"Input:
http://10.0.0.1/query.exe
http://11y10x09w:80/howaboutme
http://192.168.100.190:1234/takeme.gpg
Output:... (8 Replies)
I am having issues escaping special characters in my AWK script as follows:
for id in `cat file`
do
grep $id in file2 | awk '\
BEGIN {var=""} \
{ if ( /stringwith+'|'+'50'chars/ ) {
echo "do this"
} else if ( /anotherString/ ) {
echo "do that"
} else {
... (4 Replies)
push @MACARRAY, "$+{catalog} $+{machine}\n" if ($info =~ /(?<catalog>catalog).+?(?<machine>\*+)/ms);
I am (still) trying to solve problem. Looking around on the server I found this piece of code. Specifically what does "$+{catalog} $+{machine}\n"
do ?
Thanks in advance (1 Reply)
Hi folks,
I have a scenario to convert the update statements into insert statements using shell script (awk, sed...) or in database using regex.
I have a bunch of update statements with all columns in a file which I need to convert into insert statements.
UPDATE TABLE_A SET COL1=1 WHERE... (0 Replies)
Discussion started by: dev123
0 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)