linux_shortcuts

Question 1

/etc/default/useradd

Answer 1

file contains default values used by the useradd utility when creating a user account, including:

Question 2

/etc/group

Answer 2

The file that contains group definitions and memberships. same as active directory

Question 3

/etc/login.defs

Answer 3

contains: Values used for the group and user ID numbers

Question 4

/etc/passwd

Answer 4

contains the user account information

Question 5

/etc/shadow

Answer 5

The file that contains the encrypted password as well as password and account expiry parameters for each user account.

Question 6

/etc/skel

Answer 6

directory contains a set of configuration file templates that are copied into a new user’s home directory when it is created, including the following files:

Question 7

passwd -d

Answer 7

removes the password from an account.

Question 8

passwd -l username

Answer 8

Lock users out with this command

Question 9

passwd -n

Answer 9

sets the minimum number of days a password exists before it can be changed.

Question 10

passwd -S username

Answer 10

displays the status of the user account.

Question 11

passwd -t

Answer 11

sets the number of days following the password expiration that the account will be disabled.

Question 12

passwd -u

Answer 12

enables (unlocks) an account.

Question 13

passwd -w

Answer 13

sets the number of days before the password expires that the user is warned.

Question 14

passwd -x

Answer 14

sets the number of days before a user must change the password (password expiration time).

Question 15

useradd - r

Answer 15

specifies that the user account is a system user

Question 16

useradd -c

Answer 16

adds a description for the account in the GECOS field of /etc/passwd.

Question 17

useradd -d

Answer 17

Specifies the path of the user’s home directory

Question 18

useradd -D

Answer 18

displays the default values specified in the /etc/default/useradd file

Question 19

useradd -e

Answer 19

specifies the date on which the user account will be disabled

Question 20

useradd -f {numdays}

Answer 20

pecifies the number of days after a password expires until the account is permanently disabled

Question 21

useradd -g group

Answer 21

defines the primary group membership

Question 22

useradd -L

Answer 22

locks the user account

Question 23

useradd -m username

Answer 23

creates the user’s home directory (if it does not exist).

Question 24

useradd -M

Answer 24

defines the secondary group membership

Question 25

useradd -n

Answer 25

does not create a group with the same name as the user (Red Hat and Fedora, respectively).

Question 26

useradd -p

Answer 26

defines the encrypted password

Question 27

useradd -s

Answer 27

defines the default shell.

Question 28

useradd -u

Answer 28

assigns the user a custom UID. This is useful when assigning ownership of files and directories to a different user.

Question 29

userdel -f username

Answer 29

forces the removal of the user account even when the user is logged into the system.

Question 30

userdel -r username

Answer 30

removes the user's home directory.

Question 31

userdel [username]

Answer 31

deletes a user

Question 32

usermod -c

Answer 32

changes the description for the account

Question 33

usermod -l

Answer 33

renames a user account.

Question 34

usermod -U

Answer 34

unlocks the user account.

Question 35

usermod

Answer 35

Modify user account