In this episode we review our IT skills. We start of with a review of Dorothy’s Linux skills. I asked her a bunch of questions to see what she’s learned. We also talk about Windows, network engineering and security.

LINUX QUESTIONS & ANSWERS

LINUX COMMANDS

What is the command for changing directories? cd

What is the command for listing a directory? ls

What is the command for listing a directory as a list with more info? ls -l

What is the command for listing a directory as a list with more info? ls -a

What is the command for showing the last part of a file? tail

How do you edit a file? nano + name of file

How do you create a new file? nano & press enter. Add test. Ctrl+X, name file, enter. Or nano + name of new file.

What is the command for showing the process tree? ps axu

What is the command for reading a file? less + name of file

LINUX FILE SYSTEM

Where are the log files located? /var/log/

Where are the config files located? /etc

Where are user files located? /home

What is /usr for? General software is installed here.

What is /usr/local for? /usr/local is “for use by the system administrator when installing software locally”.

What is /var for? This folder contains log files about the software on your computer.

What is /etc/init.d for? The init.d directory contains a number of start/stop scripts for various services on your system.

DHCP

What is DHCP used for? A service that automatically provides network configuration. Must have a server and a client.

What are the 3 different configuration options for DHCP? Dynamic (Address Pool), by Manual Allocation (MAC address) and Automatic.

Which configuration option did we use? Dynamic