diff --git a/docs.it4i/general/accessing-the-clusters/graphical-user-interface/x-window-system.md b/docs.it4i/general/accessing-the-clusters/graphical-user-interface/x-window-system.md
index 1e2d5dcc77fb43ae36fac262ba5b39e0d9661f36..08836c81209fe9bfbc4b53847cf732dd96a5a570 100644
--- a/docs.it4i/general/accessing-the-clusters/graphical-user-interface/x-window-system.md
+++ b/docs.it4i/general/accessing-the-clusters/graphical-user-interface/x-window-system.md
@@ -9,7 +9,7 @@ The X Window system is a principal way to get GUI access to the clusters. The **
### Linux Example
-In order to display graphical user interface GUI of various software tools, you need to enable the X display forwarding. On Linux and Mac, log in using the -X option in ssh client:
+In order to display the GUI of various software tools, you need to enable the X display forwarding. On Linux and Mac, log in using the -X option in the SSH client:
```console
local $ ssh -X username@cluster-name.it4i.cz
@@ -17,7 +17,7 @@ In order to display graphical user interface GUI of various software tools, you
### PuTTY on Windows
-On Windows use the PuTTY client to enable X11 forwarding. In PuTTY menu, go to Connection-SSH-X11, mark the Enable X11 forwarding checkbox before logging in.
+On Windows, use the PuTTY client to enable X11 forwarding. In PuTTY menu, go to Connection-SSH-X11, mark the Enable X11 forwarding checkbox before logging in.
@@ -25,14 +25,14 @@ Then log in as usual.
### WSL (Bash on Windows)
-In order to display graphical user interface GUI of various software tools, you need to enable the X display forwarding. Log in using the -X option in ssh client:
+In order to display the GUI of various software tools, you need to enable the X display forwarding. Log in using the -X option in the SSH client:
```console
local $ ssh -X username@cluster-name.it4i.cz
```
!!! tip
- If you are getting error message "cannot open display", then try to export DISPLAY variable, before attempting to log in:
+ If you are getting the "cannot open display" error message, try to export the DISPLAY variable, before attempting to log in:
```console
local $ export DISPLAY=localhost:0.0
@@ -40,13 +40,13 @@ In order to display graphical user interface GUI of various software tools, you
## Verify the Forwarding
-To verify the forwarding, type
+To verify the forwarding, type:
```console
$ echo $DISPLAY
```
-if you receive something like
+if you receive something like:
```console
localhost:10.0
@@ -56,7 +56,7 @@ then the X11 forwarding is enabled.
## X Server
-In order to display graphical user interface GUI of various software tools, you need running X server on your desktop computer. For Linux users, no action is required as the X server is the default GUI environment on most Linux distributions. Mac and Windows users need to install and run the X server on their workstations.
+In order to display the GUI of various software tools, you need a running X server on your desktop computer. For Linux users, no action is required as the X server is the default GUI environment on most Linux distributions. Mac and Windows users need to install and run the X server on their workstations.
### X Server on OS X
@@ -64,11 +64,11 @@ Mac OS users need to install [XQuartz server][d].
### X Server on Windows
-There are variety of X servers available for Windows environment. The commercial Xwin32 is very stable and rich featured. The Cygwin environment provides fully featured open-source XWin X server. For simplicity, we recommend open-source X server by the [Xming project][e]. For stability and full features we recommend the [XWin][f] X server by Cygwin
+There is a variety of X servers available for the Windows environment. The commercial Xwin32 is very stable and feature-rich. The Cygwin environment provides fully featured open-source XWin X server. For simplicity, we recommend the open-source X server by the [Xming project][e]. For stability and full features, we recommend the [XWin][f] X server by Cygwin
| How to use Xwin | How to use Xming |
|--- | --- |
-| [Install Cygwin][g]. Find and execute XWin.exe to start the X server on Windows desktop computer.[If no able to forward X11 using PuTTY to CygwinX][1] | Use Xlaunch to configure the Xming. Run Xming to start the X server on Windows desktop computer. |
+| [Install Cygwin][g]. Find and execute XWin.exe to start the X server on Windows desktop computer. [If unable to forward X11 using PuTTY to CygwinX][1] | Use Xlaunch to configure Xming. Run Xming to start the X server on a Windows desktop computer. |
Read more [here][h].
@@ -77,7 +77,7 @@ Read more [here][h].
!!! note
Make sure that X forwarding is activated and the X server is running.
-Then launch the application as usual. Use the & to run the application in background.
+Then launch the application as usual. Use the & to run the application in background:
```console
$ ml intel (idb and gvim not installed yet)
@@ -88,11 +88,11 @@ $ gvim &
$ xterm
```
-In this example, we activate the intel programing environment tools, then start the graphical gvim editor.
+In this example, we activate the Intel programing environment tools and then start the graphical gvim editor.
## GUI Applications on Compute Nodes
-Allocate the compute nodes using -X option on the qsub command
+Allocate the compute nodes using -X option on the qsub command:
```console
$ qsub -q qexp -l select=2:ncpus=24 -X -I
@@ -100,28 +100,28 @@ $ qsub -q qexp -l select=2:ncpus=24 -X -I
In this example, we allocate 2 nodes via qexp queue, interactively. We request X11 forwarding with the -X option. It will be possible to run the GUI enabled applications directly on the first compute node.
-**Better performance** is obtained by logging on the allocated compute node via ssh, using the -X option.
+For **better performance**, log on the allocated compute node via SSH, using the -X option.
```console
$ ssh -X r24u35n680
```
-In this example, we log in on the r24u35n680 compute node, with the X11 forwarding enabled.
+In this example, we log on the r24u35n680 compute node, with the X11 forwarding enabled.
## Gnome GUI Environment
-The Gnome 2.28 GUI environment is available on the clusters. We recommend to use separate X server window for displaying the Gnome environment.
+The Gnome 2.28 GUI environment is available on the clusters. We recommend using a separate X server window for displaying the Gnome environment.
### Gnome on Linux and OS X
-To run the remote Gnome session in a window on Linux/OS X computer, you need to install Xephyr. Ubuntu package is
+To run the remote Gnome session in a window on a Linux/OS X computer, you need to install Xephyr. Ubuntu package is
xserver-xephyr, on OS X it is part of [XQuartz][i]. First, launch Xephyr on local machine:
```console
local $ Xephyr -ac -screen 1024x768 -br -reset -terminate :1 &
```
-This will open a new X window with size 1024 x 768 at DISPLAY :1. Next, ssh to the cluster with DISPLAY environment variable set and launch gnome-session
+This will open a new X window of size 1024x768 at DISPLAY :1. Next, connect via SSH to the cluster with the DISPLAY environment variable set and launch a gnome-session:
```console
local $ DISPLAY=:1.0 ssh -XC yourname@cluster-name.it4i.cz -i ~/.ssh/path_to_your_key
@@ -129,28 +129,28 @@ local $ DISPLAY=:1.0 ssh -XC yourname@cluster-name.it4i.cz -i ~/.ssh/path_to_you
yourname@login1.cluster-namen.it4i.cz $ gnome-session &
```
-On older systems where Xephyr is not available, you may also try Xnest instead of Xephyr. Another option is to launch a new X server in a separate console, via:
+On older systems where Xephyr is not available, you may also try Xnest instead of Xephyr. Another option is to launch a new X server in a separate console via:
```console
xinit /usr/bin/ssh -XT -i .ssh/path_to_your_key yourname@cluster-namen.it4i.cz gnome-session -- :1 vt12
```
-However this method does not seem to work with recent Linux distributions and you will need to manually source
+However, this method does not seem to work with recent Linux distributions and you will need to manually source
/etc/profile to properly set environment variables for PBS.
### Gnome on Windows
Use XLaunch to start the Xming server or run the XWin.exe. Select the "One window" mode.
-Log in to the cluster, using [PuTTY][2] or [Bash on Windows][3]. On the cluster, run the gnome-session command.
+Log in to the cluster using [PuTTY][2] or [Bash on Windows][3]. On the cluster, run the gnome-session command.
```console
$ gnome-session &
```
-In this way, we run remote gnome session on the cluster, displaying it in the local X server
+This way, we run a remote gnome session on the cluster, displaying it in the local X server.
-Use System-Log Out to close the gnome-session
+Use System-Log Out to close the gnome-session.
[1]: #if-no-able-to-forward-x11-using-putty-to-cygwinx
[2]: #putty-on-windows