Ubuntu Linux
Install jhead:
sudo apt-get install jhead
To see all the extra data that is stored in the JPG, run this:
jhead -v FILE.jpg
To remove the extra data such as "geo-tagging(location data)", your name and the type of phone or camera that look the picture, run this command on the image:
jhead -purejpg FILE.jpg
Mac OS X
Install exiftool:
http://www.sno.phy.queensu.ca/~phil/exiftool/install.html
To see all the extra data that is stored in the JPG, run this:
exiftool -v FILE.jpg
To remove the extra data such as "geo-tagging(location data)", your name and the type of phone or camera that look the picture, run this command on the image:
exiftool -all= FILE.jpg