separating filename and extension Post: 302113433

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filename extension check - regular expression

How to compare the file name for "zip" or "ZIP" extension. I can put one more || condition to check the upper case in the below: if ]; then Is there any better way to compare using regular expressions. Thx in advance.

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Hi All, i need to change the filename extension. For simplicity, we can assume that the extension after '.' is 3 characters only... but the filenames can vary. eg. changing from abc.doc to abc.dxs can i have a oneline command to achieve this

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script takes the whole filename instead of just extension

I am running my script from "/abc/" this path and it has no ".csv files" but has a ".txt" files namely temp1.txt My script goes as below, wherein it is suppose to find files with *.txt extension and *.csv extension in another path namely "/abc/xyz/": #!/bin/ksh PATH1="/abc/xyz/" value="*.csv...

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I need a small script (sh) to remove in a variable the filename extension. Example: f = "testfile.txt" and I need a $a with "testfile". Some one a idea?

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Hi Experts, need one help.. m writing a shell script for which i need the entire path of the file but without its extension. running the below script gives error at the statement DIR = `dirname $FILE` --command not found. #!/bin/bash jar xvf *jar for FILE in `find . -name "*.class"` ...

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Is there an easy way to strip off a filename's extension? For example, here's a filename: blahblahblah.thisisok.thisisnotok I want to get rid of .thisisnotok from the filename, so that what's left is blahblahblah.thisisok Thanks. I have a directory full of filenames that need to be...

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Rename all files (filename with spaces) to different extension

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[BASH] Getting a filename its extension

Heyas As i often have decide things upon a filename its extension, i thought i'd write a script: Just wondering if there would be a more efficent way? out="" FN=$( echo "$1" | sed s," ","",g) # Remove any spaces and make it a single string for chance in $(echo "$FN"|sed s,"\."," ",g) # Use...

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)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

filename extension check - regular expression

Discussion started by: devs

2. Shell Programming and Scripting

changing filename extension

Discussion started by: Hiso

3. UNIX for Dummies Questions & Answers

script takes the whole filename instead of just extension

Discussion started by: wolverine999

4. Shell Programming and Scripting

cut filename extension

Discussion started by: Essbaumer