Do you need command line power Right Now, but that dumb kiosk/firewall doesn't allow it? Or want to try some commandline tool before installing it? SimpleShell is here for you! Free terminal emulator + Linux shell account accessible with plain web browser, no registration required. Only major limitation is 15 minutes session timeout and no network access (but will be allowed soon). Just click Start my session. You may want to switch to SSL-secured access first. Don't hesitate to share your opinion in the guestbook.
Service is available only on "best-effort" basis. Don't use this service to process confidential or otherwise critical data.