Sysadmin how to run a cron job properly?

how can I delete running crons?
What do I have to do in crontab -e (nano editor)?

 

I'm using laravel..
I want to try scheduling so I already add this command to crontab -e:
* * * * * php /home/path/to/artisan log:demo
and I already make sure the command is working if I run it via cmd "php /home/path/to/artisan log:demo" then it display like this :
(the command for write like below on laravel.log)
[2016-08-03 13:59:34] local.INFO: Test 2016-08-03 13:59:34

so I expect the cron is already working but its not working.
nothing happend on my laravel.log
but
I see the /var/log/cron, and the output:
Aug 3 14:01:01 digitalocean CROND[14484]: (root) CMD (php /home/path/to/artisan log:demo)
Aug 3 14:02:01 digitalocean CROND[14499]: (root) CMD (php /home/path/to/artisan log:demo)

I don't know what it means. I think its working? but why my command not work?

NB:
service crond status (return = "crond (pid 14907) is running...")
service crond restart : (return =
Stopping crond: [ OK ]
Starting crond: [ OK ]
)
chkconfig crond on (return nothing)

 

Code:

0 5 * * * root /opt/google-compute-snapshot/gcloud-snapshot.sh >> /var/log/cron/snapshot.log 2>&1

Hello this snapshot sh did nto work and I think the problem is in the log file creation

please help

 

very strange,

after making the changes to reflect /var/log/snapshot.log , the wordpress was not working at all as if the site is down

and was lucky that i have a backup

however the crontab after restoring the google snapshot backup shows one line of @^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@

any help?

 

the wordpress timout looks like it is related to
csf -x

command

 

yes, but I want to uninstall CSF, looks like it is not possible start wordpress if this unistalled

 

I'm not as technical as you, but I think it is not related to the port whitelisting as I said I already enabled http and https
I have another VPS instance that I uninstalled CSF and it works fine, I just don't know why this one dosn't,

 

yes, but when I checked, I discovered it is installed, I will investigate this later

 

Hi, did you fix this problem?

I have same problem, run php /home/path/to/artisan cmd:excute is ok, but when add to cronjob, nothing run.

service crond status
service crond restart
chkconfig crond on

run all cmd before but new cronjob not work.

cronjob -l is show full my cronjob