Managing Users and Groups Flashcards
/etc/passwd file contents
Stores User account information
/etc/shadow file contents
Hashed passwords, password requirements and expiration information
chage command
change age command, used to control password, expiration, expiration warnings, inactive days, and other information for existing accounts
Usermod -aG command
Adds user to a group and keeps them in their existing groups
usermod -l
changes the user’s login name
usermod -c
sets the comment field
List two commands to lock a user
passwd -l {user name}
Usermod -L {user name}
List two commands to unlock a user
passwd -u {user name}
Usermod -L {user name}
/etc/group file contents
storage and information location about all the groups on a system
Groupadd command
creates a group
Groupmod command
Used to change the group’s own attributes
Groupdel command
Delete groups from the /etc/group file
Groupmod -g command
change the group ID
Groupmod -n command
rename a group
whoami command
Used to display the user name with which you are logged in to the system
who command
Used to determine the details of users currently logged in to a system
W command
primarily used to display the details of users who are currently logged in to a system
Last command
Displays the history of user login and logout actions, along with the actual time and date
ID command
Used to display user ID and group ID information
.bashrc file
enables customization of the user’s own environment
.bash_profile
Provides shell configuration for the initial login environment
/etc/skel
Contents of this file are copied into the home directories of new users
/etc/profile
Provides system-wide environment variables
run only at login
.profile
user-specific bash customizations are pulled from the .profile file
