You want to automate changing passwords for multiple users listed in a file users.txt. Which script snippet correctly changes each user's password to NewPass123 using passwd?

hard📝 Application Q15 of 15

Linux CLI - Users and Groups

You want to automate changing passwords for multiple users listed in a file users.txt. Which script snippet correctly changes each user's password to NewPass123 using passwd?

Afor user in $(cat users.txt); do echo -e "NewPass123\nNewPass123" | passwd $user; done

Bwhile read user; do echo "NewPass123" | passwd --stdin $user; done < users.txt

Cfor user in users.txt; do passwd $user NewPass123; done

Dcat users.txt | passwd -p NewPass123

Step-by-Step Solution

Solution:

Step 1: Understand how to feed password to passwd
The passwd command reads password from standard input when piped, requiring password twice (new and confirmation).
Step 2: Analyze each script snippet
while read user; do echo "NewPass123" | passwd --stdin $user; done < users.txt uses --stdin which is not standard on all systems. for user in $(cat users.txt); do echo -e "NewPass123\nNewPass123" | passwd $user; done correctly uses echo -e to send password twice piped to passwd. for user in users.txt; do passwd $user NewPass123; done incorrectly treats file name as user list. cat users.txt | passwd -p NewPass123 misuses passwd with pipe and -p which is invalid.
Final Answer:
for user in $(cat users.txt); do echo -e "NewPass123\nNewPass123" | passwd $user; done -> Option A
Quick Check:
Pipe password twice to passwd in loop = B [OK]

Quick Trick: Pipe password twice with echo -e inside loop to automate [OK]

Common Mistakes:

Using non-standard --stdin option
Not sending password twice for confirmation
Treating filename as username list without reading
Misusing passwd options

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You want to automate changing passwords for multiple users listed in a file users.txt. Which script snippet correctly changes each user's password to NewPass123 using passwd?

Step 1: Understand how to feed password to passwd

Step 2: Analyze each script snippet

Final Answer:

Quick Check:

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Step 1: Understand how to feed password to `passwd`