hi, a newbie here, I was unable to run anything yet, so probably a configuration error, but I can’t find the answer to this 
the output of run attempt is:
Open On-Chip Debugger 0.10.0-dev-00270-g7ec9836 (2016-05-18-11:24)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
Info : auto-selecting first available session transport “hla_swd”. To override use ‘transport select ’.
Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD
adapter speed: 1000 kHz
adapter_nsrst_delay: 100
srst_only separate srst_nogate srst_open_drain connect_assert_srst
srst_only separate srst_nogate srst_open_drain connect_assert_srst
Info : Unable to match requested speed 1000 kHz, using 950 kHz
Info : Unable to match requested speed 1000 kHz, using 950 kHz
Info : clock speed 950 kHz
Error: open failed
in procedure ‘program’
in procedure ‘init’ called at file “embedded:startup.tcl”, line 473
in procedure ‘ocd_bouncer’
** OpenOCD init failed **
shutdown command invoked
my system details:
lsb_release -a
No LSB modules are available.
Distributor ID: neon
Description: KDE neon User Edition 5.7
Release: 16.04
Codename: xenial
uname -a
Linux jano-lap 4.4.0-28-generic #47-Ubuntu SMP Fri Jun 24 10:09:13 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
IDE:
Eclipse IDE for C/C++ Developers
Version: Mars.2 Release (4.5.2)
Build id: 20160218-0600
ARM Compiler for MCU (for Linux 64 bits) 1.7.0.201602291252 fr.ac6.feature.mcu.externaltools.armnone.linux64.feature.group Ac6
Eclipse IDE for C/C++ Developers 4.5.2.20160218-0600 epp.package.cpp null
External Tools for Linux (64 bits) 1.3.0.201507241112 fr.ac6.feature.mcu.externaltools.linux64.feature.group Ac6
GNU ARM C/C++ Cross Compiler 2.2.1.201606210758 ilg.gnuarmeclipse.managedbuild.cross.feature.group Liviu Ionescu
GNU ARM C/C++ J-Link Debugging 4.1.1.201606210758 ilg.gnuarmeclipse.debug.gdbjtag.jlink.feature.group Liviu Ionescu
GNU ARM C/C++ OpenOCD Debugging 4.1.1.201606210758 ilg.gnuarmeclipse.debug.gdbjtag.openocd.feature.group Liviu Ionescu
GNU ARM C/C++ Packs (Experimental) 2.2.2.201606210758 ilg.gnuarmeclipse.packs.feature.group Liviu Ionescu
GNU ARM C/C++ QEMU Debugging 3.1.1.201606210758 ilg.gnuarmeclipse.debug.gdbjtag.qemu.feature.group Liviu Ionescu
GNU ARM C/C++ STM32Fx Project Templates 2.5.1.201606210758 ilg.gnuarmeclipse.templates.stm.feature.group Liviu Ionescu
OpenOCD (for Linux 64 bits) 1.9.0.201605241152 fr.ac6.feature.mcu.externaltools.openocd.linux64.feature.group Ac6
OpenSTM32 IDE 1.9.1.201606201728 fr.ac6.feature.mcu.ide.feature.group Ac6
OpenSTM32 Linker Script editor 1.7.0.201602121829 fr.ac6.feature.mcu.ldscript.feature.group Ac6
OpenSTM32 Remote debugging support 1.9.0.201605241146 fr.ac6.feature.mcu.debug.feature.group Ac6
Subversive SVN Connectors 5.0.2.I20151228-1700 org.polarion.eclipse.team.svn.connector.feature.group Polarion Software
Subversive SVN Team Provider 3.0.4.I20160131-1700 org.eclipse.team.svn.feature.group Eclipse.org
SVNKit 1.8.11 Implementation (Optional) 5.0.2.I20151228-1700 org.polarion.eclipse.team.svn.connector.svnkit18.feature.group Polarion Software
do I need install something more? configure paths? summon the demon?
Thanks for reading!