Linux Bash /dev/tcp/HOST/PORT

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bash中的特殊命令

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exec 8<>/dev/tcp/192.168.106.213/9200
echo -e "GET _cat/indices HTTP/1.1\r\nhost: http://127.0.0.1\r\nConnection: close\r\n\r\n" >&8
cat <&8
exec 8<&-