can't download github project with curl command

curl -L -O https://github.com/ziyaddin/xampp/archive/master.zip

• you must use https://
• you must use -L to follow redirects

You can also download a tarball (*.tar.gz) with:

curl -LkSs https://api.github.com/repos/ziyaddin/xampp/tarball -o master.tar.gz

or if you use the -O you can omit the filename, but then your saved ".tar.gz" file, is named by default to "tarball", so you have to rename it and add the ".tar.gz" filetype postfix. So use the (lowercase) -o as above. The rest:

• Ss - use silent mode, but show errors, if any
• k - use an insecure SSL connection without checking the TLS cert.

$ curl -I http://github.com/ziyaddin/xampp/archive/master.zip
HTTP/1.1 301 Moved Permanently
Server: GitHub.com
Date: Sun, 28 Apr 2013 09:24:53 GMT
Content-Type: text/html
Content-Length: 178
Connection: close
Location: https://github.com/ziyaddin/xampp/archive/master.zip
Vary: Accept-Encoding

... so you need to use -L if you want to follow the HTTP redirect. Or just read Steven Penny's answer...