OS Management FAQs
1. A folder still exists after deleting it in Web Data Management
Cause: an NFS locking issue. NFS will clean up the folder when it considers the timing appropriate.
2. A draggable gray bar appears after connecting via VNC
Cause: configuration compatibility issues across Linux versions. Delete .config/xfce4/xfconf/xfce-perchannel-xml/xfce4-pannel.xml, disconnect the VNC session, and reconnect.
3. After changing a password in AD, both old and new passwords can log in
This is expected behavior in AD: the old and new passwords can both work for a few minutes. The AD server is not part of the product.
4. After setting a user's home directory to a non-existent path, SSH/VNC cannot be used
On Ubuntu, if the parent directory of a user's home directory does not exist on the node, the system cannot create the user's home directory.
5. In a Windows cluster, RDP shows "Resource is closed" after the repackaged node sits idle for a while
The Windows system may crash internally, causing the RDP service to disconnect. Reboot the node and try again.
6. CentOS 6 system volume does not auto-expand
In CentOS 6, sfdisk may not return the correct size on the first growpart call, causing resize to fail. Reboot once and the resize should succeed.
7. After removing user A from the sudoers group in NIS, user A can still use sudo on the cluster
The cluster component nscd caches entries. It takes time to take effect (about 30 minutes). The same applies when adding users. Other external authentication systems may show similar behavior (external LDAP, external AD, and so on).
8. When opening a new VNC/SSH browser session, the original session is disconnected and shows "Resource is closed"
Only one active connection is allowed per account. A new connection replaces the old session, so the original window shows "Resource is closed". Refresh the original page to reconnect.
9. CentOS 6 cannot SSH to Ubuntu 22.04 machines
Due to the large OpenSSH version gap, we will not update the OpenSSH version for compatibility.
10. How to run Firefox or Chrome properly in Ubuntu 22.04 VNC sessions
We recommend using Firefox installed via .deb or Chrome installed via the official .deb package, instead of the default snap version.