Security

Question 1

/var/run/utmp

Answer 1

File that allows setting that would deny or allow permission to useful commands for regular users such as “who and w”.

Question 2

/etc/nologin

Answer 2

If file exists then no user other than root can log in.

Question 3

xinetd

Answer 3

Super security daemon

Question 4

/etc/xinetd.d/*

Answer 4

Every server that runs via xinetd is configured in a file located here.

Question 5

/etc/hosts.allow

Answer 5

All hosts defined are allowed access to the system. All other hosts are denied

Question 6

Configuration file for xinetd

Answer 6

/etc/xinetd.conf

Question 7

/etc/hosts.deny

Answer 7

All hosts defined are denied all others are allowed

Question 8

/etc/inetd.d/*

Answer 8

Location of individual server config files for inetd

Question 9

ssh-add

Answer 9

Adds your RSA key that is managed by ssh-agent

Question 10

Location of DSA key

Answer 10

~/.ssh/id_dsa

Question 11

~/.ssh/authorized_keys

Answer 11

Contents of a .pub key on a remote server that wants to connect to origin server here

Question 12

User’s location for GPG keys

Answer 12

~/.gnupg/*

Question 13

ssh-keygen

Answer 13

Generate new OpenSSH keys

Question 14

Location of RSA key

Answer 14

~/.ssh/id_rsa

Question 15

Public side of your DSA key

Answer 15

id_dsa.pub

Question 16

Location of the host key created when using ssh-keygen

Answer 16

/etc/ssh/ssh_host_dsa_key

Question 17

Where info is on machines the system administrator trusts users to connect to

Answer 17

/etc/ssh_known_hosts

Question 18

ssh-agent

Answer 18

Adds configured keys to the password ring for use in the current session

Question 19

Config file for SSH

Answer 19

/etc/ssh/ssh_config

Question 20

gpg

Answer 20

Allows you to digitally sign messages as encrypted

Question 21

gpg –gen-key

Answer 21

Generate a GPG key

Question 22

gpg –export keyname > gpg.pub

Answer 22

Users with gpg.pub can decrypt your message and view it

Question 23

gpg –import keyname.pub

Answer 23

Import someone’s pub file to your key ring so you can read their encrypted messages

Question 24

gpg –list-keys

Answer 24

List the GPG keys in your key ring

Question 25

gpg –edit-key

Answer 25

Brings up an interactive menu to manage keys

Question 26

First two characters of an MD5 hashed password (salt)

Answer 26

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