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Linux+ (LXO-104) > Security > Flashcards

Flashcards in Security Deck (26):
1

/var/run/utmp

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

2

/etc/nologin

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

3

xinetd

Super security daemon

4

/etc/xinetd.d/*

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

5

/etc/hosts.allow

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

6

Configuration file for xinetd

/etc/xinetd.conf

7

/etc/hosts.deny

All hosts defined are denied all others are allowed

8

/etc/inetd.d/*

Location of individual server config files for inetd

9

ssh-add

Adds your RSA key that is managed by ssh-agent

10

Location of DSA key

~/.ssh/id_dsa

11

~/.ssh/authorized_keys

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

12

User's location for GPG keys

~/.gnupg/*

13

ssh-keygen

Generate new OpenSSH keys

14

Location of RSA key

~/.ssh/id_rsa

15

Public side of your DSA key

id_dsa.pub

16

Location of the host key created when using ssh-keygen

/etc/ssh/ssh_host_dsa_key

17

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

/etc/ssh_known_hosts

18

ssh-agent

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

19

Config file for SSH

/etc/ssh/ssh_config

20

gpg

Allows you to digitally sign messages as encrypted

21

gpg --gen-key

Generate a GPG key

22

gpg --export keyname > gpg.pub

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

23

gpg --import keyname.pub

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

24

gpg --list-keys

List the GPG keys in your key ring

25

gpg --edit-key

Brings up an interactive menu to manage keys

26

First two characters of an MD5 hashed password (salt)

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