A Linux system administrator is searching the passwd file for any username that starts with a digit. Which grep command should the administrator use?

Jan 26, 2021 Last Updated: Jan 26, 2021 No Comments

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Question:
A Linux system administrator is searching the passwd file for any username that starts with a digit. Which grep command should the administrator use?

grep '(0-9}' /etc/passwd
grep '[0-9]' /etc/passwd
grep '_[0-9]' /etc/passwd
grep '^[0-9]' /etc/passwd

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