https://ftp5.de.freebsd.org/gentoo-portage/dev-cpp/json11/?C=S;O=A
Index of /gentoo-portage/dev-cpp/json11
index ofgentoo portagedevcpp
https://ftp.debian.org/debian/pool/main/j/json11/
Index of /debian/pool/main/j/json11
index ofdebianpoolmainj
https://mirrors.wikimedia.org/ubuntu/pool/universe/j/json11/?C=M;O=D
Index of /ubuntu/pool/universe/j/json11
index ofubuntupooluniversej