My case closed.
From: http://x2go-user.x2go.narkive.com/NC6nUXiX/cp-not-writing-through-dangling-symlink-opt-x2gothinclient-chroot-etc-x2go-x2gothinclient-init
 I modify /etc/x2go/x2gothinclient_settings, and omitting the "heuler" at the end of this line:
-TC_X2GO_DEBURL="deb http://packages.x2go.org/debian $TC_DISTRO_CODENAME main heuler"
+TC_X2GO_DEBURL="deb http://packages.x2go.org/debian $TC_DISTRO_CODENAME main"

Then my TCE runs successfully.
Best Regards,
Popung


On Fri, Jun 3, 2016 at 7:59 PM, Popung <popung@gmail.com> wrote:
Thanks for your fast response Stefan, and my apologize for the inconvenience of my previous email.

I run this command after log in as root to TCE:
# startx
Error:
xauth: file /root/.Xauthority does not exist

# touch /root/.Xauthority
# startx
And then system brings me to X text mode.

Then I run x2goclient manually, I can connect and log in to X2Go Server.

Regards,
Popung

On Fri, Jun 3, 2016 at 2:46 PM, Popung <popung@gmail.com> wrote:
Hello list,

I use http://wiki.x2go.org/doku.php/wiki:advanced:tce:install as my guide to install X2Go TCE on:
- Linux Mint 17.3 MATE x86-64 as X2Go Server, and
- Debian 7.90 as PXE server
(both are VMWare VM).

Booting my thinclient I got boot menu:
X2Go Thin Client Environment
- Boot from local harddrive
- X2Go Thin Client
- memtest86+ (run memory test)
Press [Tab] to edit options

When I choose "X2Go Thin Client", it just only showing text mode login as below:

Debian GNU/Linux 7 x2gothinclient tty1
x2gothinclient login: _

Do I possibly missed something in my config?