How to open multiple instances of an application in OS X

you’ll need to do so via the Terminal command line using the following:


open -n -a "APPLICATION NAME"

This command tells the system to open a new instance (the “-n” flag) of an application (the “-a” flag) that is the given name in quotes.

Edit cron jobs via SSH

1. Login with ssh

2. Then use this command:


crontab -e

3. Press “a” to enter edit mode

4. Make any necessary changes*

5. Press ESC then write -wq to save and exit

 

* Necessary changes:

For example, use this


5 * * * * curl http://google.com

to execute the curl every 5 minutes

Also, on top of the cron file, you can have the email notification like this line:


MAILTO=daniel.oraca@gmail.com

and this will send email notifications each time the cron job gets executed