-1Petr
Kulhanek
kulhanek@chemi.muni.cz
National Center for Biomolecular Research, Faculty of Science
Masaryk University, Kamenice 5, CZ-62500 Brno
Remote Access to Linux (Unix)
from MS Windows
Native applications (Putty, WinSCP, VcXsrv)
PS / 2020 Distance form of teaching: Rev1
-2Native
applications
Remote
Linux
machine
MS Windows
Putty
WinSCP
command line, (X-forward)
copying/moving files
GUI
VcXsrv GUI secure (encrypted) data
transmission is used in all cases
-3Remote
Access
➢ Putty
Comment:
• ssh server must be running on the remote machine
(activated by the administrator, runs on all nodes on the
WOLF cluster).
• The security fingerprint must be confirmed the first
time you log in to ssh server.
• In default setting, Putty cannot run graphics
applications.
-4-
Putty
Putty http: //www.chiark.greenend.org.uk/ ~sgtatham/putty /
Implementation of SSH (Secure Shell) for Windows, which allows remote
connection to computers that support this protocol (mostly Unix type).
-5Putty
- Connection
WOLF cluster: use nodes wolf02-wolf23 in
domain ncbr.muni.cz
(e.g., wolf02.ncbr.muni.cz)
remote machine address
More complex settings can be
saved and easily restored in the
future.
Opens the terminal:
• you will be asked to approve the fingerprint of ssh server (first login)
• you must enter a login name
• you must enter a password (input is not indicated, no asterisks, etc.)
-6Putty
- Setting I
Proper operation of the backspace key.
Constant width font.
-7Putty
- Setting II
selection by mouse compatible with
Unix terminals
-8Remote
File Transfer
➢ WinSCP
Comment:
• ssh server must be running on the remote
machine.
• The security fingerprint must be
confirmed first time you log in ssh server.
• Possible problems with text files.
-9-
WinSCP
WinSCP http://winscp.net/eng/docs/lang:cs
Program for file transfer between MS Windows and computers supporting SFTP
or SCP protocols (mostly Unix and Linux type).
local machine
remote machine
-10Text
files MS Win  Linux
Text files created under MS Windows and Linux are not completely compatible
because each operating system uses a different encoding of end of line.
Linux: \n (line feed 0x0A)
MS Windows: \r + \n (carriage return 0x0D, line feed 0x0A)
Programs d2u and u2d can be used to convert files. They are available on the
WOLF cluster.
1) Activation of module cats
$ module add cats
2) Conversion MS Windows => Linux
$ d2u file.com
3) Conversion Linux => MS Windows
$ u2d file.log
Additional information:
http://en.wikipedia.org/wiki/Newline
-11-
X-server
➢ VcXsrv
-12-
VcXsrv
VcXsrv https://sourceforge.net/projects/vcxsrv/
A program that provides an X-server, which is necessary for remote or local
running of graphical applications.
1. Install the program VcXsrv.
2. Run the program.
• Firewall: limit availability to a private network
• When saving the configuration, it may be necessary to reselect the path for the
users who have diacritics in the name.
• Insert 0 into the field "Display number“ (it will not allow more than one server to
run)
• Into box "Additional parameters for VcXsrv“, insert
-xkbmodel pc105 -xkblayout us -xkbvariant qwerty, -xkboptions grp:lalt_lshift_toggle
-13VcXsrv
- Usage
1. To run graphic applications from a remote machine (i.e., display export) it is necessary
to activate X11 forwarding when connecting via ssh connection:
1. putty
1. see the next page for instructions
2. ssh (Cygwin)
1. -X option (capital X)
-14VcXsrv
+ Putty
Activation of
X11 forwarding
local X11 server
1. To run graphical applications via Putty it is necessary to add X11 forwarding to the
settings.
-15Typical
Way of Work
1. If you plan to run graphics applications (Nemesis, avogadro, vmd) available on the
WOLF cluster, start the X server on your MS Windows workstation. The X server can be
started only once, the run is indicated by the X icon in the status bar.
2. In the Putty terminal, log in to the remote machine. For the WOLF cluster, use the
wolf02-wol23 nodes in the ncbr.muni.cz domain, e.g., wolf02.ncbr.muni.cz
• You can open several terminals.
• You can run graphical applications on a remote machine. You access the data
directly.
• You run calculations on a cluster using a batch system.
3. Data policy
• You hold the data on a WOLF cluster, you do not need to copy it to Win
• The WinSCP program can be use for backups or archiving
Disadvantages:
• slowness/response of graphics applications
-16-
Example
Putty:
running application
Nemesis (on
background &)
Putty:
second terminal Works directly with
files in the home
directory of the WOLF
cluster
Application Nemesis runs
on a remote machine
wolf02
-17-
Alternatives
➢ Cygwin (https://www.cygwin.com/)
➢ MobaXterm (https://mobaxterm.mobatek.net/)