What Should I Do If Error Message "Module is unknown" Is Displayed When I Remotely Log In to a Linux ECS?
When I attempted to remotely log in to a Linux ECS, the system displayed error Message "Module is unknown".
- To resolve this issue, you are required to restart the ECS and enter the rescue mode.
- Restarting the ECS may interrupt services. Exercise caution when performing this operation.
The file in the /etc/pam.d/ directory was modified by mistake.
- Enter the single-user mode.The following uses CentOS 7 as an example:
- Restart the ECS and click Remote Login.
- Press the up arrow key to prevent automatic system startup. When the kernels are displayed, press e to enter the editing mode.Figure 2 Entering the kernel editing mode
The grub file is encrypted by Euler images by default. Before entering the edit mode, you need to contact customer service to obtain username and password.
- Locate the row containing linux16 and delete undesired parameters.
- Change ro to rw for mounting the root partition with read-write permissions.
- Add rd.break and press Ctrl+X.Figure 3 Before the modificationFigure 4 After the modification
- Run the following command to go to the /sysroot directory:
# chroot /sysroot
- Run the following command to view the system log for error files:
- Comment out or modify the error line in the error files displayed in the system log.
- Restart the ECS and try to log in to it again.