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- UIDs 1-500 are usually reserved for what kind of users?
- System accounts, such as server processes*
- Are not used for user accounts, but for group accounts
- Log-in (human) users
- Remote log-in accounts
- If a user is deleted, the files and directories that the user owned…
- …will show a UID as the owner, but not user name.*
- …will have no UID owner.
- …are deleted as well.
- …will have no user owner.
- Which of the following options for the
useraddcommand allows root to specify the UID to be associated with the account?- -U
- -u*
- -G
- -g
- Which of the following options for the
useraddcommand allows root to specify supplementary groups the user will be a member of?- -G*
- -u
- U
- -g
- On a system that does not use UPG, the
useraddcommand will also create a user group. For example, user bob, group bob.
True or False?- True
- False*
- The
useraddcommand will create a home directory by default for a user.
True or False?- True*
- False
- The
usermodcommand can be used to do all of the following except…- …add a user to a supplementary group.
- …change the user’s MAX and MIN password settings.*
- …change the user’s home directory.
- …change the user’s UID and GID.
- Which of the following commands will add the group extra to the user bob’s secondary groups in addition to bob’s current secondary groups?
- usermod -G extra bob
- usermod -a extra bob
- usermod -aG extra bob*
- usermod -ag bob extra
- Which option for the
usermodcommand can be used to specify a user’s group ID (either primary or secondary)? (choose two)- -g*
- -G*
- -s
- -S
- For non-root users, the passwd command can only be used to change the password of the user running the command.True or False?
- True*
- False
- The
userdelcommand will…- …delete the user account, but leave the user’s files by default.*
- …will prompt before deleting each file owned by a user.
- …automatically delete a user and the user’s home directory and its contents.
- …automatically delete a user and all the files owned by that user.
- The
groupmodcommand can be used to change a group name.
True or False?- True*
- False
- The
groupmodcommand can be used to change a group GID.
True or False?- True*
- False
- The
groupmodcommand can be used to add users to a group.
True or False?- True
- False*
- Which of the following commands can be used to modify a group?
- groupadd
- modgroup
- addgroup
- groupmod*
- Which command can be used to determine a user’s most recent log in?
- last*
- history
- shell
- login
- Which of the following files contains encrypted user password information?
- /etc/usr
- /etc/shadow*
- /etc/passwd
- /etc/group
- Which of the following files contains user IDs?
- /etc/group
- /etc/shadow
- /etc/usr
- /etc/passwd*
- Which of the following files does the groupadd command use to determine the new GID when a GID isn’t specified?
- /etc/shadow
- /etc/group*
- /etc/passwd
- /etc/usr
- Which of the following commands, run as root, will prevent the user bob from logging in?
- usermod -d bob
- usermod -l bob
- usermod -D bob
- usermod -L bob*
- What directory contains user’s home directories?
- /
- /home*
- /rootfs
- /user
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