Crawl websites for generating their caches.
Make the shell script executable
$ chmod +x cache-generate.sh
Create a file and add a line containing all your websites' domains you want to be check, separated by space. For example :
www.mysite1.com en.mysite1.com www.mysite2.de
You can't write some comments, just put a # at the begin of the comment's line.
Execute the script with the path to this file as argument. For example :
$ ./cache-generate.sh /tmp/mydomainsfile