Can't run sudo apt-get update behind corporate proxy - Raspberry Pi Forums

i trying connect quick update , upgrade behind corporate proxy.

following link me https://www.raspberrypi.org/documentati ... ess-cli.md

can see missing important info corporate network.

in order connect need log in via web browser , authenticate on page redirected to. kind of sort of page when connect via wifi in cafe. can connect if login internet via page.

question how reach page via command line on pi when haven't (or don't want to) log in gui?

when try quick sudo update on boot, error get.

network open (doesn't require encryption need username , password connect it)

using pi 0 running pixel

code: select all

get:1 http://mirrordirector.raspbian.org jessie inrelease [4,114 b] get:2 http://archive.raspberrypi.org jessie inrelease [4,114 b] 100% [1 inrelease gpgv 4,114 b]splitting /var/lib/apt/lists/partial/mirrordirector.raspbian.org_raspbian_dists_jessie_inrelease data , signature faileign http://mirrordirector.raspbian.org jessie inrelease e: gpg error: http://mirrordirector.raspbian.org jessie inrelease: clearsigned file isn't valid, got 'nodata' (does network require authentication?) 

this sounds specific restrictions imposed corporate network attempting connect to. have considered approaching or network support heldesk advice? if seek legitimate best placed help: if isn't, assisting circumvent policy not want do.

if issue navigating authentication page in absence of gui, have experimented see whether text-only browser such lynx allow make progress?

raspberrypi