ADV *NIX DAY 8

Question 1

A common CLI tool used to capture network packets.

Answer 1

tcpdump

Question 2

Used to determine if tcpd supports a service. The command prints shared library dependencies for that service.

Answer 2

ldd

Question 3

Display the file name of the terminal connected to standard input.

Answer 3

tty

Question 4

Display login/logout information about users and terminals.

Answer 4

last

Question 5

List user’s name, tty, login time, and related information for each current system user.

Answer 5

who

Question 6

Reports the most recent login of all users or a given user.

Answer 6

lastlog

Question 7

Message of the day, content is provided after successful login before the prompt.

Answer 7

/etc/motd

Question 8

Contains a message or system identification to be printed before the login prompt.

Answer 8

/etc/issue

Question 9

File which contains a message or system identification(banner) to be printed before the login prompt from the network.

Answer 9

/etc/issue.net

Question 10

Configuration file for the sendmail(SMTP) service.

Answer 10

/etc/mail/sendmail.cf

Question 11

OpenSSHSSH daemon configuration file.

Answer 11

/etc/ssh/sshd_config

Question 12

TCP Wrappers file to allow access to incoming connections.

Answer 12

/etc/hosts.allow

Question 13

TCP Wrappers file to deny access to incoming connections.

Answer 13

/etc/hosts.deny

Question 14

Restricts the ability of users to login as root on any terminal other than the console.

Answer 14

/etc/securetty

Question 15

File controls the manner that rsyslogd manages messages.

Answer 15

/etc/rsyslog.conf

Question 16

File contains a record of all logins and logouts. View with last command.

Answer 16

/var/log/wtmp

Question 17

File contains information about who is currently using the system. View with who command.

Answer 17

/var/run/utmp

Question 18

File maintains the most recent login of all users. View with lastlog command.

Answer 18

/var/log/lastlog

Question 19

Maintains a record or attempts to execute su command.

Answer 19

/var/log/secure

Question 20

Lists various system warning and error message events as determined by the rsyslogd.

Answer 20

/var/log/messages

Question 21

Maintains a record of all mail activity.

Answer 21

/var/log/maillog

Question 22

Maintains a record of all cron activity.

Answer 22

/var/log/cron