Lab: Logging to a Different Facility "explain meaning that occured in terminal pls"

Hi, I finished this lab but I suspected the meaning in terminal.
first
.
.
and Why I got an error when I ran command again.
second

Your first run was success
Why did you run mongod again?
It will fail as you cannot have two mongods running on same port,dbpath
May be you wanted to connect to mongod
You should use mongo
mongod-to start a mongod instance
mongo-to connect to it

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Can you explain about child process for me?
I didn’t get it.

Please refer to fork() from manpages on any Unix server
man fork

Hi @Thitipat_Sakchatmongkhon,

You can find plenty of resources online on this topic.