Echo text to file?

[ryanoa]

Is it possible to echo text to a file from my iPXE menu as in a bash script?

i.e..

#!ipxe
echo ${serial} >> http://X.X.X.X/logs/logfile.txt

[NiKiZe]

If you want to output to something on a http server, use a server-side script to collect the data.
If you need to send more data then just a few strings, then you can use http://ipxe.org/cmd/param

If you want something that you use as initrd contents, that is also not supported.