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UNIX QUESTIONS 1

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LPI QUESTIONS
Luiz Eduardo
Quiz by Luiz Eduardo, updated more than 1 year ago
Luiz Eduardo
Created by Luiz Eduardo over 5 years ago
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Question 1

Question
When connecting to an SSH server for the first time, its fingerprint is received and stored in a file, which is located at:
Answer
  • ~/ .ssh/fingerprints
  • ~/ .ssh/id_dsa
  • ~/ .ssh/known_hosts
  • ~/ .ssh/id_dsa.pub
  • ~/ .ssh/gpg.txt

Question 2

Question
Where is the user foo’s procmail configuration stored, if home directories are stored in /home? Please enter the complete path to the file[blank_start].[blank_end]
Answer
  • /home/foo/.procmailrc

Question 3

Question
Postfix daemons can be chroot’d by setting the chroot flag in [blank_start]_______[blank_end]. (Supply only the filename, without a path)
Answer
  • master.cf

Question 4

Question
What is the default location for sendmail configuration files? (Please provide the complete path to the directory[blank_start])[blank_end]
Answer
  • /etc/mail

Question 5

Question
What command is used to print NFS kernel statistics? (Provide the command with or without complete path)[blank_start]_______[blank_end]
Answer
  • nfsstat

Question 6

Question
What is the name of the module in Apache that provides the HTTP Basic Authentication functionality? (Please provide ONLY the module name) [blank_start]___[blank_end]
Answer
  • mod_auth

Question 7

Question
In which directory can all parameters available to sysctl be found? (Provide the full path)[blank_start]____[blank_end]
Answer
  • /proc/sys

Question 8

Question
This program has 3 operating modes: copy-in mode, copy-out mode, and copy-pass mode, and is used to copy files into or out of archives. What program is this? (Please provide the command name only, with no arguments or path.) [blank_start]___[blank_end]
Answer
  • cpio

Question 9

Question
The command [blank_start]___________[blank_end] -x foo will delete the user foo from the Samba database. (Specify the command only, no path information.)
Answer
  • smbpasswd

Question 10

Question
What postfix configuration setting defines the domains for which Postfix will deliver mail locally? (Please provide only the configuration setting name with no other information[blank_start])[blank_end]
Answer
  • mydomain

Question 11

Question
What is the path to the global postfix configuration file? (Please specify the complete directory path and file name[blank_start])[blank_end]
Answer
  • /etc/postfix/main.cf

Question 12

Question
Which Samba-related command will show all options that were not modified using smb.conf and thus are set to their default values? Please enter the command and its parameter(s):[blank_start]___[blank_end]
Answer
  • testparm -v

Question 13

Question
Which site-specific configuration file for the shadow login suite must be modified to log login failures? Please enter the complete path to that file._[blank_start]__[blank_end]
Answer
  • /etc/login.defs

Question 14

Question
You are not sure whether the kernel has detected a piece of hardware in your machine. What command, without options or parameters, should be run to present the contents of the kernel ring-buffer?[blank_start]____[blank_end]
Answer
  • dmesg

Question 15

Question
You have installed some new libraries, but these are not available to programs and are not listed by lconfig -p. What file should the path to the libraries be added to, before running ldconfig? [blank_start]____[blank_end]
Answer
  • ld.so.conf

Question 16

Question
nfsd, portmap and [blank_start]________[blank_end] daemons must be running on an NFS server.
Answer
  • mountd

Question 17

Question
With which parameter in the smb.conf file can a share be hidden?[blank_start]__[blank_end]
Answer
  • browseable=no

Question 18

Question
Please enter the complete command to create a new password file for HTTP basic authentication (/home/http/data/web _passwd) for user john. htpasswd -c /home/http/data/web_passwd john
Answer
  • True
  • False

Question 19

Question
Please enter the command used to remove Kerberos tickets from the cache below.[blank_start]__[blank_end]
Answer
  • kdestroy

Question 20

Question
All machines outside the network are able to send emails through the server to addresses not served by that server. If the server accepts and delivers the email, then it is a(n) [blank_start]_____________[blank_end]. Please enter the English term, without any punctuation.
Answer
  • open relay

Question 21

Question
Which command can be used to save the current iptables rules into a file? Please enter only the command without path or parameters.[blank_start]_[blank_end]
Answer
  • iptables-save

Question 22

Question
Which file on a Postfix server modifies the sender address for outgoing e-mails? Please enter only the file name without the path.[blank_start]___[blank_end]
Answer
  • sender_canonical

Question 23

Question
Running tcpdump -nli eth1 ‘icmp’ shows the following output: 11:56:35.599063 IP 192.168.123.5 > 194.25.2.129: icmp 64: echo request seq 1 11:56:35.670910 IP 194.25.2.129 > 192.168.123.5: icmp 64: echo reply seq 1 What command was used on the host 192.168.123.5, to generate this output?[blank_start]__[blank_end]
Answer
  • ping

Question 24

Question
Which command can be used to change the password for an LDAP entry?[blank_start]__[blank_end]
Answer
  • ldappasswd

Question 25

Question
In which directory are the PAM modules stored?[blank_start]__[blank_end]
Answer
  • /lib/security

Question 26

Question
What file should be edited to make the route command show human-readable names for networks? (Please enter the full path)[blank_start]___[blank_end]
Answer
  • /etc/networks

Question 27

Question
Which keys are stored in the authorized_keys file?
Answer
  • public
  • private

Question 28

Question
To allow X connections to be forwarded from or through an SSH server, what line must exist in the sshd configuration file? X11Forwarding yes
Answer
  • True
  • False

Question 29

Question
A malicious user has sent a 35MB video clip, as an attachment, to hundreds of Recipients. Looking in the outbound queue reveals that this is the only mail there.This mail can be removed with the command rm [blank_start]_______________[blank_end] * . Complete the path below.
Answer
  • /var/spool/mqueue/

Question 30

Question
Which file, in the local file-system, is presented when the client requests http://server/~joe/index.html and the following directive is present in server’s Apache configuration file? UserDir site/html Given that all users have their home directory in /home, please type in the FULL file name including the path. Answer: /home/joe/site/html/index.html
Answer
  • True
  • False

Question 31

Question
Which port must be open on a firewall, to allow a DNS server to receive queries? (Enter only the port number).
Answer
  • 56
  • 63
  • 8080
  • 53

Question 32

Question
The users of the local network complain that name resolution is not fast enough. Enter the command, without the path or any options, that shows the time taken to resolve a DNS query[blank_start].[blank_end]
Answer
  • dig

Question 33

Question
37 In which configuration file can a key-file be defined to enable secure DNS zone transfers? (Please enter the file name without the path)[blank_start]__[blank_end]
Answer
  • named.conf

Question 34

Question
Which type of DNS record defines which server(s) email for a domain should be sent to? Answer: MX
Answer
  • True
  • False

Question 35

Question
Using only commands included with named, what is the command, with options or parameters, to make named re-read its zone files?[blank_start]_[blank_end]
Answer
  • rndc reload

Question 36

Question
Which daemon is required on the client if an ethernet device gets its IP address from a central server?__
Answer
  • dhcp
  • dhcpcd
  • bootpd
  • ethd
  • dhcpd

Question 37

Question
A network has many network printers connected and they should get their addresses using DHCP. What information from each printer is needed to always assign them the same IP address when dhcpd is used as the DHCP server?
Answer
  • MAC address
  • Host name
  • Serial number
  • Factory default IP address
  • Built-in network card type

Question 38

Question
Select the alternative that shows the correct way to disable a user login (except for root)
Answer
  • The use of the pam_nologin module along with the /etc/login configuration file
  • The use of the pam_deny module along with the /etc/deny configuration file
  • The use of the pam_pwdb module along with the /etc/pwdb.conf configuration file
  • The use of the pam_console module along with the /etc/security/console.perms configuration file
  • The use of the pam_nologin module along with the /etc/nologin configuration file

Question 39

Question
Which command would release the current IP address leased by a DHCP server?
Answer
  • ipconfig /release
  • ifconfig –release-all
  • dhclient -r
  • ifconfig –release
  • pump –release

Question 40

Question
Which records must be entered in a zone file in order to use "Round Robin Load Distribution" for a web server?
Answer
  • www.example.org. 60 IN A 192.168.1.1 www.example.org. 60 IN A 192.168.1.2 www.example.org. 60 IN A 192.168.1.3
  • www.example.org. 60 IN A 192.168.1.1;192.168.1.2;192.168.1.3
  • www.example.org. 60 IN A 192.168.1-3
  • www.example.org. 60 IN RR 192.168.1:3
  • www.example.org. 60 IN RR 192.168.1.1;192.168.1.2;192.168.1.3

Question 41

Question
Which of these tools can provide the most information about DNS queries?
Answer
  • dig
  • nslookup
  • host
  • named-checkconf
  • named-checkzone

Question 42

Question
Which command line create an SSH tunnel for POP and SMTP protocols?
Answer
  • ssh- L :110 -L :25 -1 user -N mailhost
  • ssh -L 25:110 -1 user -N mailhost
  • ssh -L mailhost:110 -L mailhost:25 -1 user -N mailhost
  • ssh -L mailhost:25:110 -1 user
  • ssh -L 110:mailhost:110 -L 25:mailhost:25 -1 user -N mailhost

Question 43

Question
An iptables firewall was configured to use the target MASQUERADE to share a dedicated wireless connection to the Internet with a few hosts on the local network. The Internet connection becomes very unstable in rainy days and users complain their connections drop when downloading e-mail or large files, while web browsing seems to be working fine. Which change to your iptables rules could alleviate the problem?
Answer
  • Change the target MASQUERADE to SNAT
  • Change the target MASQUERADE to DNAT
  • Change the target MASQUERADE to BALANCE and provide a backup Internet connection
  • Change the target MASQUERADE to REDIRECT and provide a backup Internet connection
  • Change the target MASQUERADE to BNAT

Question 44

Question
Connecting to a remote host on the same LAN using ssh public-key authentication works but forwarding X11 doesn’t. The remote host allows access to both services. Which of the following can be the reason for that behaviour?
Answer
  • The remote user’s ssh_config file disallows X11 forwarding
  • A different public key has to be used for X11
  • The remote server’s sshd_config file disallows X11 forwarding
  • X11 cannot be forwarded if public-key authentication was used
  • X11 though SSH needs a special X11 server application installed

Question 45

Question
Which THREE of the following actions should be considered when a FTP chroot jail is created?
Answer
  • Create /dev/ and /etc/ in the chroot enviroment
  • Create /etc/passwd in the chroot enviroment
  • Create /var/cache/ftp in the chroot enviroment
  • Create the user ftp in the chroot enviroment
  • Create /usr/sbin/ in the chroot enviroment

Question 46

Question
To be able to access the server with the IP address 10.12.34.56 using HTTPS, a rule for iptables has to be written. Given that the client host’s IP address is 192.168.43.12, which of the following commands is correct?
Answer
  • iptables – A FORWARD -p tcp -s 0/0 -d 10.12.34.56 –dport 80 -j ACCEPT
  • iptables – A FORWARD -p tcp -s 192.168.43.12 d 10.12.34.56:443 -j ACCEPT.
  • iptables – A FORWARD -p tcp -s 192.168.43.12 -d 10.12.34.56 –dport 443 -j ACCEPT.
  • iptables – A INPUT -p tcp -s 192.168.43.12 – d 10.12.34.56:80 -j ACCEPT.
  • iptables – A FORWARD -p tcp -s 0/0 -d 10.12.34.56 –dport 443 -j ACCEPT.

Question 47

Question
When the default policy for the iptables INPUT chain is set to DROP, why should a rule allowing traffic to localhost exist?
Answer
  • All traffic to localhost must always be allowed.
  • It doesn’t matter; iptables never affects packets addressed to localhost
  • Sendmail delivers emails to localhost
  • Some applications use the localhost interface to communicate with other applications.
  • syslogd receives messages on localhost

Question 48

Question
A server is being used as a smurf amplifier, whereby it is responding to ICMP Echo-Request packets sent to its broadcast address. To disable this, which command needs to be run?
Answer
  • ifconfig eth0 nobroadcast
  • echo "0" > /proc/sys/net/ipv4/icmp_echo_accept_broadcasts
  • iptables -A INPUT -p icmp -j REJECT
  • echo "1" > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
  • echo "1" > /proc/sys/net/ipv4/icmp_echo_nosmurf

Question 49

Question
To allow X connections to be forwarded from or through an SSH server, what configuration keyword must be set to yes in the sshd configuration file?
Answer
  • AllowForwarding
  • ForwardingAllow
  • XllForwardingAllow
  • XllForwarding

Question 50

Question
Which of the following options are valid in /etc/exports? (Choose two.)
Answer
  • rw
  • ro
  • rootsquash
  • norootsquash
  • uid

Question 51

Question
Which of the following nmap parameters scans a target for open TCP ports? (Choose two.)
Answer
  • -sO
  • -sZ
  • -sT
  • -sU
  • -sS

Question 52

Question
Which of the following commands can be used to connect and interact with remote TCP network services? (Choose two.)
Answer
  • nettalk
  • nc
  • telnet
  • cat
  • netmap

Question 53

Question
Which BIND option should be used to limit the IP addresses from which slave name servers may connect?
Answer
  • allow-zone-transfer
  • allow-transfer
  • allow-secondary
  • allow-slaves
  • allow-queries

Question 54

Question
What option for BIND is required in the global options to disable recursive queries on the DNS server by default?
Answer
  • allow-recursive-query ( none; );
  • allow-recursive-query off;
  • recursion { disabled; };
  • recursion { none; };
  • recursion no;

Question 55

Question
Which option within a Nginx server configuration section defines the file system path from which the content of the server is retrieved?
Answer
  • location
  • htdocs
  • DocumentRoot
  • root
  • base_dir

Question 56

Question
What directive can be used in named.conf to restrict zone transfers to the 192.168.1.0/24 network?
Answer
  • allow-transfer { 192.168.1.0/24; };
  • allow-transfer { 192.168.1.0/24 };
  • allow-axfr { 192.168.1.0/24; };
  • allow-axfr { 192.168.1.0/24 };

Question 57

Question
To securely use dynamic DNS updates, the use of TSIG is recommended. Which TWO
Answer
  • TSIG is used for zone data encryption
  • TSIG is a signal to start a zone update
  • TSIG is used in zone files
  • TSIG is used only in server configuration
  • Servers using TSIG must be in sync (time zone!)

Question 58

Question
Which option is used to configure pppd to use up to two DNS server addresses provided by the remote server?
Answer
  • ms-dns
  • nameserver
  • usepeerdns
  • dns
  • None of the above

Question 59

Question
A DNS server has the IP address 192.168.0.1. Which TWO of the following need to be done on a client machine to use this DNS server?
Answer
  • Add nameserver 192.168.0.1 to /etc/resolv.conf
  • Run route add nameserver 192.168.0.1
  • Run ifconfig eth0 nameserver 192.168.0.1
  • Run echo “nameserver 192.168.1.1” >> /etc/resolv.conf
  • Run bind nameserver 192.168.1.1

Question 60

Question
There is a restricted area in an Apache site, which requires users to authenticate against the file /srv/ www/security/site-passwd. Which command is used to CHANGE the password of existing users, without losing data, when Basic authentication is being used.
Answer
  • htpasswd -c /srv/www/security/site passwd user
  • htpasswd /srv/www/security/site-passwd user
  • htpasswd -n /srv/www/security/site-passwd user
  • htpasswd -D /srv/www/security/site-passwd user
  • None of the above
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