10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I have the following file I wanted to convert mutiple spaces to tab:
I tried cat filename | tr ' ' '\t' or sed 's/ */ /' FILE
but it looses the format
5557263102 5557263102 5552074858 5726310211 5557263102 5557263102
5557263103 5557263103 2142406768 ... (2 Replies)
Discussion started by: amir07
2 Replies
2. Shell Programming and Scripting
Hi All.
Attached are two files.
I ran a query and have the output as in the file with name "FILEWITHFOURRECORDS.txt "
I didn't want all the spaces between the columns so I squeezed the spaces with the "tr" command and also added a carriage return at the end of every line.
But in two... (3 Replies)
Discussion started by: sparks
3 Replies
3. Shell Programming and Scripting
Hi Friends,
I looked up online, but couldn't figure out a proper solution.
I have an input file where the columns are separated by multiple spaces and the column content is separated by single space.
For example,
Chr1 hello world unix is fun
In the above example, chr1 is first... (3 Replies)
Discussion started by: jacobs.smith
3 Replies
4. UNIX for Dummies Questions & Answers
I am looking for a regular expression that uses sed to replace multiple spaces with single spaces on every line where it is not at the start of the line and not immediately before double slashes ('//') or between quotes (").
In its simplest form, it would look like this:
sed -e 's# # #g'... (4 Replies)
Discussion started by: figaro
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5. Shell Programming and Scripting
I neead a script which converts low values to the spaces, When I used
sed -e 's/\x00/\x20/g' inputfile command it is removing the low values but not replacing it with spaces. Please help me. Its Uregent. Thanks
Sam (12 Replies)
Discussion started by: bsreee35
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6. UNIX for Dummies Questions & Answers
I am trying to read a txt file and trying to translate multiples spaces into single spaces so the file is more organized, but whenever I try the command:
tr ' ' ' ' w.txt
The output is:
tr: extra operand `w.txt'
Try `tr --help' for more information.
Can someone please help? :wall:
... (2 Replies)
Discussion started by: Nonito84
2 Replies
7. Shell Programming and Scripting
consider the small piece of code
while read line
do
echo $line
done < example
content of example file
sadasdasdasdsa erwerewrwr ergdgdfgf rgerg erwererwr
the output is like
sadasdasdasdsa erwerewrwr ergdgdfgf rgerg erwererwr
the... (4 Replies)
Discussion started by: Kesavan
4 Replies
8. Shell Programming and Scripting
Hey all, I have a list in the format ;
variable length with spaces
more variable information
some more variable information
and I would like to transform that 'column' into rows ;
variable length with spaces more variable information some more variable information
Any... (8 Replies)
Discussion started by: TAPE
8 Replies
9. Shell Programming and Scripting
Greetings,
I have a bunch of music files that I want to strip the underscores out, and leave only spaces. All that I've found on the web is how to add underscores to files that have spaces, and reversing the "tr" command does not make a difference.
Here is how to convert spaces to... (6 Replies)
Discussion started by: brakeb
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10. Shell Programming and Scripting
I'm reading from a file that is semi-colon delimited. One of the fields contains 2 spaces separating the first and last name (4th field in - "JOHN<space><space> DOE"):
e.g. TORONTO;ONTARIO;1 YONGE STREET;JOHN DOE;CANADA
When I read this record and either echo/print to screen or write to... (4 Replies)
Discussion started by: NinersFan
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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)