Show:
Commands
User Limits
Log Files and Commands
Miscellaneous Facts
The Root User
100

This command isn't used very much because limits that are configured with it will affect programs that are launched only from within the shell prompt.

What is ulimit

100

This sign is used in front of a group name to indicate it's a group.

What is the @ sign

100

This log file contains a list of all users who've ever authenticated to the system.


What is wtmp
100

This command sets the number of days between password changes and the date of the last password change. 

What is Chage

100

"su" in the su command stands for this

What is Switch User

200
This command puts limits on domain, type, item, and value.

What are pam_limits

200

These are the two values we have when we specify type

What are hard and soft limits

200

Log files are saved in this type of format

What is a binary format.

200

This logs the user out of the shell. It is identical to exit. 

What is logout

200
This switches you to the root user account and loads all the root environment variables

What is su-

300

This command is used to list files

What is an LS Command or LS

300
Specifying this will restrict the maximum number of open files.

What is fsize

300

This command places a limit on the number of times the password can be entered incorrectly.

What is pam-tally2

300

This Allows users to securely edit files. This command is equivalent to running sudo -e 

What is sudoedit

300

This uses a configuration file to decide which user is authorized to run what command as the root user.

What is sudo

400
This command displays a list of all users and when they last logged in.

What is lastlog

400

Specifying this will set the amount of CPU time that can be used by a single process in minutes. 

What is CPU

400

This is the application protocol used over an IP network to manage and access the distributed directory info service

What is LDAP or Lightweight Directory Access protocol.

400

This command specifies a set of users who are allowed to execute a specific set of commands 

What is User_Alias

400

This is used to edit your sudoers file

What is visudo

500

This command is useful in situations where you need to find out who is either running a command on your system, or who has a file open on your system. 

What is fuser or the fuser command
500

Specifying this will specify the number of concurrent processes that will be allowed. 

What is nproc

500

This displays a list of all users logged in (and out) since the /var/log/wtmp file was created. 

What is the last file or last.

500

This makes the IP address 192.123.256.1

What is a number can't be higher than 256

500

This is used to define an alias that contains the various commands that we want users to be able to run.

What is Command_Alias