A.The /etc/crontab file can specify a year field.

B.The /etc/crontab file has a user field for commands.

C.A normal crontab file allows for environment variable substitution.

D.A normal crontab file must be installed with the crontab command.

A.Command

B.Minute

C.Effective group ID

D.Year

E.Username

A.UID have precedence over GIDs, therefore the user is available while the group doesn't.

B.UIDs and GIDs are independent of each other, therefore the user as well as the group are still available.

C.The user is the only member of the group, even if the group configuration contains other members.

D.The user as well as the group are not available to avoid ambiguity due to the ID conflict.

E.GIDs have precedence over UIDs, therefore the group is available while the user isn't.

A.find /usr -uid 0 -perm +4000

B.find /usr -suid -perm +4000

C.find -type suid -username root -d /usr

D.find /usr -ls \*s\* -u root

E.find -user root +mode +s /usr