ネットワークチェック

ifconfig

ip a

netstat -i

ifup

netstat -tlnp

ss -tlnp

ps -ef | grep tcp

ping -t

curl -X POST https://api.example.com -h 'Content-Type: application/json' -b '{"a":1}'

curl --POST https://api.example.com --body '{"a":1}'

curl -X POST -H 'Content-Type: application/json' -d '{"a":1}' https://api.example.com

curl -post -head 'application/json' -data '{"a":1}' https://api.example.com

-r

--purge

--delete

--mirror

ssh -R 5432:db.internal:5432 alice@bastion

ssh -L 5432:db.internal:5432 alice@bastion

ssh -D 5432 alice@bastion

ssh -p 5432 alice@bastion db.internal