Question: Write a bash script named hw13-5 displays the total number of users who have attached processes. An attached process is one with an assigned TTY

Write a bash script named hw13-5 displays the total number of users who have attached processes. An "attached process" is one with an assigned TTY number (Field 12 of the ps -l output). Include each userid only one time in the total (since they may be logged in more than one time).

SAMPLE COMMAND AND OUTPUT: >hw13-5 20 Users have attached processes

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