I have about 100 jobs on my hudson CI, possible to mass delete them ?
You can programmatically use the XML api (or use the JSON flavor if you prefer that):
http://your.hudson.url/api/xml?xpath=//job/name&wrapper=jobs
Returns:
firstJob
secondJob
Now iterate over the job names and do a post request to
http://your.hudson.url/job/your.job.name/doDelete
(You can do this with any programming language you like that supports XML and HTTP)