#webservers using netcat, busybox nc, or ncat
#this will work with the full version of ncat, but busybox nc doesn't have '-c' builtin
ncat -l -p 8000 -c 'echo -e "HTTP/1.1 200 OK\r\n$(date)\r\n\r\n";echo "
How are you today?
"'

#this is more universal
{ echo -e 'HTTP/1.1 200 OK\r\n'; echo "
How are you today?
"; } | netcat -l -p 8000

#keep it up and running after serving files
while [ 1 ];do { echo -e 'HTTP/1.1 200 OK\r\n'; echo "
How are you today?
"; } | busybox -l -p 8000;done

#or you can pass it a file
{ echo -e 'HTTP/1.1 200 OK\r\n'; cat index.html; } | busybox nc -l -p 8000

#or the output of a command
{ echo -e 'HTTP/1.1 200 OK\r\n'; ls /; } |busybox nc -l -p 8000

#or a command with html tags
#note the use of '' and use single quotes due to special characters 
{ echo -e 'HTTP/1.1 200 OK\r\n'; echo '';echo "
";for i in /*;do echo "
$i
";done;echo "
"; } | busybox nc -l -p 8000
{ echo -e 'HTTP/1.1 200 OK\r\n'; echo '';
#you can embed images into your document with base64

{ echo -e 'HTTP/1.1 200 OK\r\n'; echo '';cat img.html; } | busybox nc -l -p 8000

#display all png images in current folder
{ echo -e 'HTTP/1.1 200 OK\r\n'; echo '';for i in *.png;do echo "";done; } | busybox nc -l -p 8000

{ echo -e 'HTTP/1.1 200 OK\r\n'; echo '';for i in *.ogg;do echo "";done; } | busybox nc -l -p 8000