Linux Security

Question 1

Root Account

Answer 1

• superuser

- all powerful account

Question 2

File Permissions

Answer 2

• each has a owenr

-

Question 3

Package Managers

Answer 3

• central repositories of code

Question 4

Network Commands

Answer 4

netstat -nutlp

n - network sockets
u - udp
t - tcp
l  - listening sockets
p - pid/name of process

# port scanning - lists all open ports
nmap localhost

list open file - since everything is a file on linux

lsof -i

# net cat - used to check if we can 
nc -v  port

Question 5

SSH Keygen

Answer 5

ssh-keygen
creates two files
private key ~/.ssh/id_rsa
public key ~/.ssh/id_rsa.pub

SSH Service Config
/etc/ssh/sshd_conf

/etc/ssh/authorized_keys => store users public key file so the user can access this server

Question 6

Port Forwarding

Answer 6

forward all local traffic on port 8080 to google.com

ssh -L 800:google.com:80