Dajngo app unicode JSON repsonse

If your django application has unicode data, and your view uses jquery and JSON response, do not forget to specify the encoding for the mimetype:

return HttpResponse(simplejson.dumps(your_data),
mimetype='application/json; charset=utf-8')

Resize files using one command

Using ImageMagick it is easy to resize multiple images by the following command:

for i in `ls *.JPG`; do convert -resize 1024 $i $i; done

A bit detailed version of this script can be found in my bitbucket repository: resizer.sh

Find duplicated files in a directory subtree

Md5deep is able to recursive examine an entire directory tree. That is, compute the MD5 for every file in a directory and for every file in every subdirectory, so you can easily use it to find your duplicated files by combining with uniq.

md5deep -r * . | uniq -w 32 -D

Unpack compressed files into separate directories

Here is a little script to unpack all compressed files such as *.rar and put them into a separate directory:

for f in *.rar;do n=${f%.rar};mkdir "$n"; unrar x "$f" "$n/";done