How to make only one instance of the same script running at any time
41491
Make sure only a single instance of a program is running
12300
How to execute a script periodically without using crontab?
89736
How can one run multiple programs in the background with single command?
12663
How can I run a script on boot?
144184
counting the number of times a script is executed
57541
How to ensure only a single instance of my application runs?
102139
How do I run a script at start up?
105490
Using nohup to keep a script running indefinitely
37180
Running multiple onEdit scripts
88174
Make script executable from within script itself
50889
Can I make a script always execute as root?
112764
Prevent Javascript from being executed twice
119927
How to repeat prompt to user in a shell script?
124173
Declaring again the same command
76822
Is there a way to use multiple instances of Chromium or Firefox?
41484
Ensure a single instance of an application in Linux
67215
How do I put an already-running process under nohup?