How can I find my User ID (UID) from terminal?

There are a couple of ways:

1. Using the id command you can get the real and effective user and group IDs.

   id -u <username>
   

   If no username is supplied to id, it will default to the current user.

2. Using the enviroment variable.

   echo $UID
   

Simply try

id

This will return your user ID, group ID, and all your groups.

Try also :

getent passwd username

This will display user id , group id and home directory .

Or:

grep username /etc/passwd