文件/etc/sudoers中的哪个选项可以设置执行特定命令时不需要密码?
A. PASSWORD=NO
B. NOPASSWD
C. NOPASSWORD
D. NOPROMPT
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在文件/etc/sudoers中,用什么符号来表示组admins?
A. @admins
B. admins
C. -admins
D. %admins
在执行脚本时,你需要阻止sudo提示输入密码,以下哪个选项可以达到此目的?
A. -n
B. --noprompt
C. -i
D. -q
以下哪些关于Linux用户密码的说法正确? (多选)
A. Passwords should be stored in the /etc/shadow file.
B. Passwords should be stored in the /etc/passwd file.
C. Passwords are stored as salted hashes.
D. Use the pwconv utility to move passwords to the /etc/shadow file.
E. Use the passwd command to change your password.
文件/etc/shadow中包含以下哪些信息? (多选)
A. Maximum password age
B. Account expiration date
C. Password
D. Comment
E. Default shell