Commands

Question 1

tcpdump

Answer 1

a command-line utility that you can use to capture and inspect traffic to and from your system

it is the most commonly used tool among network administrators for troubleshooting network issues and security testing

Question 2

grep

Answer 2

an essential Linux and Unix command

used to search text and strings in a give file
searches the given file for lines containing a match to the given strings or words

grep can report the number of times that the pattern has been matched for each file using the -c (count) option

Question 3

nslookup

Answer 3

command displays information that you can use to diagnose Doman Name System (DNS) infrastructure

only available if you have installed the TCP/IP protocol

has two modes: interactive and noninteractive

Question 4

netstat

Answer 4

command displays active TCP connections, ports on which the computer is listening, Ethernet statistics, the IP routing table, IPv4 statistics, and IPv6 statistics

Question 5

chmod

Answer 5

sets the permissions of files or directories

Question 6

tracert

Answer 6

diagnostic utility determines the route to a destination by sending Internet Control Message Protocol (ICMP) echo packets to the desitination