Need a Time Difference Website

 If you travel a lot, you may need to compare times between cities.

Here is a brand new website with a clear user interface. 

Time difference calculator between major cities. Not only finds the time difference but also it gives:

• Time zone names
• UTC offsets
• Time in 12h and 24h format
• Am/Pm time comparison between city times.

Check the https://www.timedifference.net/ two find time differences between cities.

Debian Nginx Port 80 Already in Use Problem and Solution

 In Debian operation system, when using nginx web server, we can get port 80 already in use error.

And this prevents system restart.

Solution is to list all processes that use port 80 and kill each of them.

Connect to your server via SSH.

And they the command below:

sudo netstat -tulpn

This command will list 

And kill each process with the PID number on the right with using the command below:

sudo kill -2 <PID>

And restart the nginx

sudo service nginx restart

Now your webserver will work as usual.