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Table of Contents
Frequently Asked Questions
- == When logging into CentOS 7 indigo, I see an error: “WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! ………….Add correct host key in $HOME/.ssh/known_hosts to get rid of this message .. What should I do? ==
This error occurs because indigo has a new SSH host key. Please edit your “known_hosts” file on your local system, and remove entries relating to indigo (indigo,indigo.eecs.yorku.ca,eecs.yorku.ca). Now you will be able to login without the warning.
I had scheduled "at" and/or "cron" jobs on CentOS 6 indigo. Will they be copied to the new CentOS 7 indigo?
At jobs and cron jobs are not transferred between systems. You will need to recreate your at and cron jobs on the new system.
I run vncserver on indigo. When I connect to my session with vncviewer, I don't see any output.
Remove the file ~/.vnc/xstartup in your home directory, then restart vncserver on indigo. A new .vnc/xstartup file will be created, and you will now be able to connect with vncviewer. The old file which was created with the older vncserver is no longer compatible with the system setup.
Why does "svn" command fail with a shared library error under CentOS 7?
The local version of the svn command (/eecs/local/bin/svn) was compiled with CentOS 6, and this linked to an older version of a dynamic library (libsasl2.so.2) which has been updated on CentOS 7. This is fixed temporarily on indigo. However, /usr/bin/svn client (the one provided by the OS) will also work in the meantime.
Shared Library Error on CentOS 7 using a haskel script
/setup: error while loading shared libraries: libgmp.so.3: cannot open shared object file: No such file or directory
/eecs/home/sel/script/script which is using a haskell file setup.hs
Paul Recommended Can you trying setting the LD_LIBRARY_PATH and running your grading scripts.
setenv LD_LIBRARY_PATH /eecs/local/lib64
db2instf
What happened to the Fortran compiler, f77?
The GNU Fortran compiler f77 has been renamed to gfortran under CentOS 7. f77 version was 3.4.6. gfortran version is 4.8.5.
Gnome Display Manager will not start up - Failure - unable to load a failsafe session
This occurred because the .xsession was not set to the current default
Contained “exec /cs/local/share/system.xfce”. Updated to the default(~template/.xsession)
Many users still have this old profile which will need updating
xterm: cannot load font 'MAIN_FONT'
You may be using an old ~/.Xresources file . Please mv .Xresources .Xresources.old
How do I get the task bar to display my open windows
From the Desktop icon at the top left, select and enter in the search bar “tweak tools” Here you can customize your desktop
gedit Couldn't connect to accessibility bus Failed to connect to socket /tmp/dbus
/bin/gedit is a Gnome application . On CentOS 7 , you will get the following error is you run the app remotely: (ssh to another host): "WARNING **: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-wWZTZGRahD: Connection refused" \\ gedit is the GNOME text editor. While aiming at simplicity and ease of use, gedit is a powerful general purpose text editor. gedit is no longer maintained, the project is looking for new maintainers, see Apps/Unmaintained
From the gnome documentation site :
Gnome Window Manager - Tweak Tools
Customizing your Desktop Settings
In order to customize some of your desktop settings use the Tweak Tools settings
Using the Activities Overview, the sidebar icons, select “Show Applications”
Type in the Search Bar “Tweak Tools” . Alternatively select “Utility Folder”
“Tweak Tools” can be located here.
From this window you can do customization to your window manager.
For example, if you want to re-instate your minimize and maximize button on a terminal window, Select “Windows” “Title Bar Buttons” Turn on Minimize and Maximize
To obtain a task bar at the bottom of you screen, Select Extensions, Windows List ON
How can I stop the cursor from blinking?
You can disable the cursor blinking for all programmes by running this command:
gsettings set org.gnome.desktop.interface cursor-blink false
How to get a new terminal
- From a command line, type $ gnome-terminal
- You can right-click on the Desktop and select “Open Terminal”
- From any Terminal prompt “Shift Ctrl N”