Terminal session on Linux?

Read about the seamless mode for the NX client
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Elementarnye
ssh -XY user@host for Example
ssh -XY denter@10.1.20.6 firefox
with home laptop runs the Fox at work (VPN tunnel at the level of routers).

ACL, all users in a separate group, which disallow to run "all but".
Drunk from gnome everything possible to generate new processes likely impossible.

make sandbox, it'll drive JUST what you need for this program, and lochte in a user

for console applications, suitable screen

as an option to start x server without a WM and DE with auto start one app. with ltsp it is possible to do I think nx should also be prepared.
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>>block all that is possible
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For KDE's kiosk mode is to dig into the side of the kiosk admin tool
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For this gnome — Sabayon Profile Manager. Pessulus Lockdown Editor.
with them when I watched them it was very sad at the same time
Sabayon just stopped running. so everything was solved by setting gnome configuration and change of configuration files, gnome and some applications.

Wow! I did not know about the existence of this method of running apps!!! Thank you very much!!!