VirtualBox shared folder is not working, and the VirtualBOx shows below warning message:
“The VirtualBox Guest Additions do not appear to be available on this virtual machine, and shared folders cannot be used without them. to use shared folders inside the virtual machine, please install the Guest Additions in they are not installed, or re-install them if they are not working properly, by selecting Insert Guest Additions CD image from the Devices menu. if they are installed but the machine is not yet fully started then shared folders will be available once it.”
After selecting Insert Guest Additions CD image from the Devices menu, we can see the Additions CD images are mounted.
But the shared folder is still not working.
[root@racnode1 media]# df -h Filesystem Size Used Avail Use% Mounted on devtmpfs 4.8G 0 4.8G 0% /dev tmpfs 2.0G 645M 1.4G 32% /dev/shm tmpfs 4.8G 8.6M 4.8G 1% /run tmpfs 4.8G 0 4.8G 0% /sys/fs/cgroup /dev/mapper/ol-root 61G 33G 29G 53% / /dev/sda1 497M 120M 377M 25% /boot tmpfs 973M 0 973M 0% /run/user/0 [root@racnode1 media]#
Now we manually mount the Additions CD images:
[root@racnode1 ~]# mount /dev/cdrom /media/cdrom mount: /dev/sr0 is write-protected, mounting read-only [root@racnode1 ~]#
Install Guest Additions CD Image manually with errors.
[root@racnode1 ~]# cd /media/cdrom [root@racnode1 cdrom]# ls -ltr total 45524 -r--r--r-- 1 root root 763 Mar 13 2019 AUTORUN.INF -r-xr-xr-x 1 root root 6384 Mar 13 2019 autorun.sh -r-xr-xr-x 1 root root 4821 Mar 13 2019 runasroot.sh -r-xr-xr-x 1 root root 270616 Jan 13 22:08 VBoxWindowsAdditions.exe -r-xr-xr-x 1 root root 9795088 Jan 13 22:09 VBoxWindowsAdditions-x86.exe -r-xr-xr-x 1 root root 16776232 Jan 13 22:12 VBoxWindowsAdditions-amd64.exe -r-xr-xr-x 1 root root 3949 Jan 13 22:21 VBoxDarwinAdditionsUninstall.tool -r--r--r-- 1 root root 3744169 Jan 13 22:21 VBoxDarwinAdditions.pkg -r-xr-xr-x 1 root root 6716837 Jan 13 22:21 VBoxLinuxAdditions.run -r--r--r-- 1 root root 9287680 Jan 13 22:22 VBoxSolarisAdditions.pkg -r--r--r-- 1 root root 547 Jan 13 22:26 TRANS.TBL dr-xr-xr-x 2 root root 2652 Jan 13 22:26 OS2 dr-xr-xr-x 2 root root 1824 Jan 13 22:26 NT3x dr-xr-xr-x 2 root root 792 Jan 13 22:26 cert [root@racnode1 cdrom]# ./VBoxLinuxAdditions.run Verifying archive integrity... All good. Uncompressing VirtualBox 6.1.2 Guest Additions for Linux........ VirtualBox Guest Additions installer Removing installed version 5.0.10 of VirtualBox Guest Additions... Removing existing VirtualBox non-DKMS kernel modules[ OK ] Copying additional installer modules ... Installing additional modules ... VirtualBox Guest Additions: Starting. VirtualBox Guest Additions: Building the VirtualBox Guest Additions kernel modules. This may take a while. VirtualBox Guest Additions: To build modules for other installed kernels, run VirtualBox Guest Additions: /sbin/rcvboxadd quicksetup <version> VirtualBox Guest Additions: or VirtualBox Guest Additions: /sbin/rcvboxadd quicksetup all VirtualBox Guest Additions: Kernel headers not found for target kernel 4.14.35-1902.8.4.el7uek.x86_64. Please install them and execute /sbin/rcvboxadd setup modprobe vboxguest failed The log file /var/log/vboxadd-setup.log may contain further information. [root@racnode1 cdrom]#
There is no 4.14.35-1902.8.4.el7uek.x86_64 kernel header.
[root@racnode1 ~]# ls -ltr /usr/src/kernels/ drwxr-xr-x 3 root root 20 Jan 6 15:33 3.10.0-327.el7.x86_64 drwxr-xr-x 3 root root 20 Jan 6 15:33 3.10.0-229.el7.x86_64 [root@racnode1 ~]#
Ignore the misleading messages in /var/log/vboxadd-setup.log.
[root@racnode1 ~]# cat /var/log/vboxadd-setup.log Could not find the X.Org or XFree86 Window System, skipping.
Check and install the following missing packages:
[root@racnode1 tmp]# yum install kernel-header* glibc-header* glibc-devel* gcc-4* cpp* kernel-uek-devel*
Then install Guest Additions again successfully.
[root@racnode1 cdrom]# ./VBoxLinuxAdditions.run Verifying archive integrity... All good. Uncompressing VirtualBox 6.1.2 Guest Additions for Linux........ VirtualBox Guest Additions installer Removing installed version 6.1.2 of VirtualBox Guest Additions... Copying additional installer modules ... Installing additional modules ... VirtualBox Guest Additions: Starting. VirtualBox Guest Additions: Building the VirtualBox Guest Additions kernel modules. This may take a while. VirtualBox Guest Additions: To build modules for other installed kernels, run VirtualBox Guest Additions: /sbin/rcvboxadd quicksetup <version> VirtualBox Guest Additions: or VirtualBox Guest Additions: /sbin/rcvboxadd quicksetup all VirtualBox Guest Additions: Building the modules for kernel 4.14.35-1902.10.7.el7uek.x86_64. [root@racnode1 cdrom]#
[root@racnode1 ~]# ls -ltr /usr/src/kernels/
drwxr-xr-x 3 root root 20 Jan 6 15:33 3.10.0-327.el7.x86_64
drwxr-xr-x 3 root root 20 Jan 6 15:33 3.10.0-229.el7.x86_64
drwxr-xr-x 24 root root 4096 Feb 23 02:54 4.14.35-1902.10.7.el7uek.x86_64
[root@racnode1 ~]#
And the shared folders are working now.
[root@racnode1 ~]# df -h Filesystem Size Used Avail Use% Mounted on ... .. . /dev/sr0 57M 57M 0 100% /media/cdrom 12.2.0.1 932G 488G 444G 53% /media/sf_Software [root@racnode1 ~]#
Appendix
Upgrade VirtualBox Additions from VirtualBox 6.1.2 to 6.1.4 successfully.
[root@racnode1 cdrom]# ./VBoxLinuxAdditions.run Verifying archive integrity... All good. Uncompressing VirtualBox 6.1.4 Guest Additions for Linux........ VirtualBox Guest Additions installer Removing installed version 6.1.2 of VirtualBox Guest Additions... Copying additional installer modules ... Installing additional modules ... VirtualBox Guest Additions: Starting. VirtualBox Guest Additions: Building the VirtualBox Guest Additions kernel modules. This may take a while. VirtualBox Guest Additions: To build modules for other installed kernels, run VirtualBox Guest Additions: /sbin/rcvboxadd quicksetup <version> VirtualBox Guest Additions: or VirtualBox Guest Additions: /sbin/rcvboxadd quicksetup all VirtualBox Guest Additions: Building the modules for kernel 4.14.35-1902.10.7.el7uek.x86_64. VirtualBox Guest Additions: Running kernel modules will not be replaced until the system is restarted [root@racnode1 cdrom]#
Make DBA Life Easy 