Network Management

HTTP request

curl https://example.com Return response body
curl -i|--include https://example.com Include status code and HTTP headers
curl -L|--location https://example.com Follow redirects
curl -O|--remote-name foo.txt https://example.com Output to a text file
curl -H|--header "User-Agent: Foo" https://example.com Add a HTTP header
curl -X|--request POST -H "Content-Type: application/json" -d|--data '{"foo":"bar"}' https://example.com POST JSON
curl -X POST -H --data-urlencode foo="bar" http://example.com POST URL Form Encoded
wget <https://example.com/file.txt> Download a file to the current directory
wget -O|--output-document foo.txt <https://example.com/file.txt> Output to a file with the specified name

ping example.com Send multiple ping requests using the ICMP protocol
ping -c 10 -i 5 example.com Make 10 attempts, 5 seconds apart
ip addr List IP addresses on the system
ip route show Show IP addresses to router
curl ifconfig.me Obtain external IP address
netstat -i|--interfaces List all network interfaces and in/out usage
netstat -l|--listening List all open ports
traceroute example.com List all servers the network traffic goes through
mtr -w|--report-wide example.com Continually list all servers the network traffic goes through
mtr -r|--report -w|--report-wide -c|--report-cycles 100 example.com Output a report that lists network traffic 100 times
nmap 0.0.0.0 Scan for the 1000 most common open ports on localhost
nmap 0.0.0.0 -p1-65535 Scan for open ports on localhost between 1 and 65535
nmap 192.168.4.3 Scan for the 1000 most common open ports on a remote IP address
nmap -sP 192.168.1.1/24 Discover all machines on the network by ping'ing them