You want to write a script that prints the username and primary group name separated by a colon, like alice:staff. Which command combination is correct?

hard📝 Application Q8 of 15

Linux CLI - Users and Groups

You want to write a script that prints the username and primary group name separated by a colon, like alice:staff. Which command combination is correct?

Aecho "$(whoami) $(id -g)"

Becho "$(id -u):$(id -g)"

Cecho "$(whoami):$(id -gn)"

Decho "$(id -un):$(id -g)"

Step-by-Step Solution

Solution:

Step 1: Identify commands for username and group name
whoami gives username, id -gn gives primary group name.
Step 2: Check command formatting
echo "$(whoami):$(id -gn)" correctly uses command substitution and colon separator.
Final Answer:
echo "$(whoami):$(id -gn)" -> Option C
Quick Check:
Use whoami and id -gn for username:group [OK]

Quick Trick: Use command substitution $(...) to combine outputs [OK]

Common Mistakes:

MISTAKES

Using numeric IDs instead of names
Missing colon separator
Mixing username with group ID

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More Linux CLI Quizzes

You want to write a script that prints the username and primary group name separated by a colon, like alice:staff. Which command combination is correct?

Step 1: Identify commands for username and group name

Step 2: Check command formatting

Final Answer:

Quick Check:

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