Example of paste command

Let's suppose we have 2 files.

nms.txt:

Robert Norton
Ted Yelsky
Chris Smith
Anna Brown
Brian Martin

depph.txt:

E001 843-677-1367
E002 831-936-5892
E003 854-849-4294
E004 884-973-9674
E005 899-055-4203

To combine them both, you can use paste command:

$ paste -d: nms.txt depph.txt
Robert Norton:E001 843-677-1367
Ted Yelsky:E002 831-936-5892
Chris Smith:E003 854-849-4294
Anna Brown:E004 884-973-9674
Brian Martin:E005 899-055-4203

where option -d specifies the delimiter