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Recursively generate MD5 checksums

Posted 10-26-2011 at 09:53 AM by Garda

I wanted to generate MD5 checksums of a whole bunch of files in a directory. It turns out that this is not as straightforward as it should be. IMO it should be completed with: md5sum -br *

Unfortunately it was not as straightforward. I found this blog entry after searching for a while and adapted this to what I needed. To generate checksums, I used the following:

Code:

find . -type f -print0 | xargs -0 md5sum -b

(Note: for the above to work, "cd"...

Garda

Member

Posted in Uncategorized

Views 450 Comments 0 Garda is offline

batch resize images using find, xargs and convert

Posted 02-20-2011 at 04:30 PM by dr_agon

Tags batch, convert, find, resize, xargs

applies to: linux, find, xargs, convert, image processing

'convert' command, which is a part of ImageMagick package can be used for image resizing, but it lacks ability to process multiple files (in version of ImageMagick 6.5.7-8 2010-12-02). Instead of writing a shell script you can use find and xargs commands to collect filenames and invoke convert with one filename at a time, like this:

Code:

find -iname "*.jpg" -printf "%f\0" \
 | xargs -0 -I {} convert

...

dr_agon

Member

Posted in Uncategorized

Views 975 Comments 0 dr_agon is offline

Inode and its corresponding filename

Posted 07-21-2009 at 08:58 AM by Mr. ameya sathe (Tantra Yantra Swatantrya)

Tags dumpe2fs, filename, find, inode

We refer to a file by its name. Computer refer to the file by its inode numbers. For every filesystem; there is an inode table. This table consists of Inode numbers & its correspondingmetadata. On the contrary; the mapping of filenames to inode numbers is stored in the directory containing the file.
To display the inode number of a file; say hindu one must issue the command

Code:

ls -i hindu

To display the total number of inode numbers in the filesystem ; you must issue the command...

Mr. ameya sathe

Member

Posted in GNU/Linux, Filesystem Intricacies

Views 2637 Comments 0 Mr. ameya sathe is offline

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