To install as an hourly cronjob, define $path_to_pingmail_script_file, then do:
line='0 * * * * '$path_to_pingmail_script_file' check'
To install as an hourly cronjob, define $path_to_pingmail_script_file, then do:
line='0 * * * * '$path_to_pingmail_script_file' check'