Open the crontab (as root):
# crontab -e
Insert the following line and save the file afterwards:
*/1 * * * * php -f /path/to/VIMP/vimp -- mediaimport >> /path/to/VIMP/log/mediaimport.log 2>&1
Attention: You have to edit both paths, the one to "vimp" and the other one to the log/ directory.
Important note:
In VIMP versions lower than 6.x, please use the command ./symfony instead of ./vimp in the code above.