- Release Notes and Announcements
- Public Image Release Notes
- Announcements
- Updating Some Image Pip Package Management Tools for CentOS 7
- CentOS 8 End of Maintenance
- Discontinuation of Support for SUSE Commercial Images
- Price Reduction in Selected Availability Zones
- OrcaTerm Proxy IP Addresses Updates
- Windows Server 2003 System Images End of Support Announcement
- Pay-as-you-go Price Adjustments for Standard S3 CVMs in the Silicon Valley Region
- Vulnerability repairing for Linux images
- End of Support for Windows Server 2008 R2 Enterprise Edition SP1 64-bit System Images
- Upgrading Virtio network card drive for Windows CVMs
- Solution to Tomcat Start Failure on Ubuntu14.04
- Stopping supporting for Ubuntu 10.04 images
- About Configuration of Security Group Port 53
- Tutorial
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- Operation Guide Overview
- Use Limits
- Convenience Features
- Instances
- Creating Instances
- Batch Sequential Naming or Pattern String-Based Naming
- Adjusting Configuration
- View Instance Details
- Renaming Instances
- Resetting Instance Password
- Managing Instance IPs
- Changing Instance Subnet
- Changing Security Group
- Searching for Instances
- Exporting Instance List
- Renewing Instances
- Querying the Repossession Status of a Spot Instance
- Shutting Down Instances
- Restarting Instances
- Logging In to Linux Instances
- Logging in to Windows instance
- Reinstalling System
- Using Tencent Cloud Automation Tools to execute commands
- Terminating/Returning Instances
- Enabling Instance Termination Protection
- Instance Repossession or Recovering
- Spot Instances
- No Charges When Shut Down for Pay-as-You-Go Instances
- Starting Up Instances
- Managing Roles
- Images
- Migrating Servers
- Cloud Disks
- Networking
- Maintenance Tasks
- Security
- Security Groups
- Protection of Sensitive Operations
- Managing Login Password
- Managing SSH Keys
- Spread Placement Group
- Unblocking Port 25
- Tags
- Monitoring and Alarms
- Sample Console Configuration
- Best Practice
- Best Practices
- Choosing the CVM Model
- Setting up a Website
- Building an Environment
- Building a Website
- Building an Application
- Building a Visual GUI
- Data Backup
- Migrating CVM Instances
- Uploading Local Files to CVM
- Copying Local Files to CVMs
- Uploading Files from MacOS to Windows CVM Using MRD
- Uploading Files from Linux to Windows CVM using RDP
- Uploading Files from Linux to a CVM Using FTP
- Uploading files via WinSCP to a Linux CVM from Windows
- Uploading Files from Windows to a CVM Using FTP
- Uploading Files from Linux or MacOS to Linux CVM via SCP
- Uploading Files from Windows to a Windows CVM via MSTSC
- Other CVM Operations
- CVM Access to COS via a Private Network
- Recovering Data on Linux CVMs
- Managing Disk Space on Windows CVMs
- Changing Kernel of a Linux Instance Manually
- Setting Up Windows-based AD Domain on a CVM
- Network Performance Test
- High-throughput Network Performance Test
- Using USB/IP to Share USB Devices in Linux
- Using RemoteFx to Redirect USB Devices in Windows
- Using AVX-512 Instructions to Accelerate AI Applications on CVM
- Building Tencent SGX Confidential Computing Environment
- Configuring Persistent Memory in M6p Instances
- Calling Cloud APIs via Python to Share Custom Images in Batches
- Operations Guide
- Initializing Data Disks
- Environment Configurations
- Installing Software
- User Data
- Work with Operating Systems
- System Activation
- System Updates
- System Shutdown
- Configuring High-performance Power Management
- Windows Recovery Mode
- Use of the atop Monitoring Tools by Linux Instances
- Ensuring Unique SIDs for CVMs Using Sysprep
- Modifying VNC Resolution
- Introduction to Linux Kernel Parameters
- Updating the Virtio ENI Driver
- Modifying SID
- Others
- Troubleshooting
- Instance-Related Failures
- CVM Login Failures
- Windows Instance Login Failures
- Windows Instance Login Failures
- An authentication error occurred when you tried to log in to a Windows instance remotely
- Failed to Reset the CVM Password or the CVM Password Is Invalid
- Windows instance: no remote Desktop license server can provide license
- Requires network-level identity verification
- Problems occurred when you tried to log in to a Windows CVM remotely on Mac
- Failed to log in to a Windows CVM due to high CPU and memory usage
- Failed to connect to a remote computer through Remote Desktop
- Credentials Not Work
- Connection to a Windows CVM through Remote Desktop was denied
- Remote Login Failure Due To Port Issues
- Linux Instance Login Failures
- Linux Instance Login Failures
- Unable to Log in to a Linux Instance via SSH Key
- Failing to log in to a Linux CVM due to high CPU and memory usage
- Remote Login Failure due to Port Issues
- VNC Login Error (Module is Unknown)
- VNC Login Error (Account Locked due to XXX Failed Logins)
- VNC Login Error (Login Failed with Correct Password)
- VNC or SSH Login Error (Permission Denied)
- Login Failure Due to /etc/fstab Configuration Errors
- sshd Configuration File Permissions
- Infinite Loop Call in /etc/profile
- Login Failure Due to Server Isolation
- Login Failure Due to High Bandwidth Occupation
- Remote Connect Failure Due to Security Group Settings
- Troubleshooting Linux Instance Issues via VNC and Rescue Mode
- Failed to shut down or restart a CVM
- Network Namespace Creation Failure
- Kernel and IO Issues
- Missing System bin or lib Soft Link
- Suspected Infection with Virus
- "no space left on device" Error During File Creation
- Linux CVM Memory Issues
- Network Related Failures
- Instance-Related Failures
- API Documentation
- History
- Introduction
- API Category
- Making API Requests
- Region APIs
- Instance APIs
- DescribeInstances
- DescribeInstanceFamilyConfigs
- DescribeZoneInstanceConfigInfos
- DescribeInstanceTypeConfigs
- DescribeInstancesOperationLimit
- DescribeInstanceVncUrl
- InquiryPriceRunInstances
- InquiryPriceResetInstance
- InquiryPriceResetInstancesType
- InquiryPriceResizeInstanceDisks
- RunInstances
- StartInstances
- RebootInstances
- StopInstances
- ResetInstance
- TerminateInstances
- ResetInstancesType
- ResizeInstanceDisks
- ResetInstancesPassword
- ModifyInstancesAttribute
- ModifyInstancesProject
- InquirePricePurchaseReservedInstancesOffering
- DescribeReservedInstancesConfigInfos
- DescribeInstancesStatus
- PurchaseReservedInstancesOffering
- Cloud Hosting Cluster APIs
- Placement Group APIs
- Image APIs
- Key APIs
- Security Group APIs
- Network APIs
- Instance Launch Template APIs
- Data Types
- Error Codes
- FAQs
- Related Agreement
- Glossary
- Release Notes and Announcements
- Public Image Release Notes
- Announcements
- Updating Some Image Pip Package Management Tools for CentOS 7
- CentOS 8 End of Maintenance
- Discontinuation of Support for SUSE Commercial Images
- Price Reduction in Selected Availability Zones
- OrcaTerm Proxy IP Addresses Updates
- Windows Server 2003 System Images End of Support Announcement
- Pay-as-you-go Price Adjustments for Standard S3 CVMs in the Silicon Valley Region
- Vulnerability repairing for Linux images
- End of Support for Windows Server 2008 R2 Enterprise Edition SP1 64-bit System Images
- Upgrading Virtio network card drive for Windows CVMs
- Solution to Tomcat Start Failure on Ubuntu14.04
- Stopping supporting for Ubuntu 10.04 images
- About Configuration of Security Group Port 53
- Tutorial
- Product Introduction
- Purchase Guide
- Getting Started
- Operation Guide
- Operation Guide Overview
- Use Limits
- Convenience Features
- Instances
- Creating Instances
- Batch Sequential Naming or Pattern String-Based Naming
- Adjusting Configuration
- View Instance Details
- Renaming Instances
- Resetting Instance Password
- Managing Instance IPs
- Changing Instance Subnet
- Changing Security Group
- Searching for Instances
- Exporting Instance List
- Renewing Instances
- Querying the Repossession Status of a Spot Instance
- Shutting Down Instances
- Restarting Instances
- Logging In to Linux Instances
- Logging in to Windows instance
- Reinstalling System
- Using Tencent Cloud Automation Tools to execute commands
- Terminating/Returning Instances
- Enabling Instance Termination Protection
- Instance Repossession or Recovering
- Spot Instances
- No Charges When Shut Down for Pay-as-You-Go Instances
- Starting Up Instances
- Managing Roles
- Images
- Migrating Servers
- Cloud Disks
- Networking
- Maintenance Tasks
- Security
- Security Groups
- Protection of Sensitive Operations
- Managing Login Password
- Managing SSH Keys
- Spread Placement Group
- Unblocking Port 25
- Tags
- Monitoring and Alarms
- Sample Console Configuration
- Best Practice
- Best Practices
- Choosing the CVM Model
- Setting up a Website
- Building an Environment
- Building a Website
- Building an Application
- Building a Visual GUI
- Data Backup
- Migrating CVM Instances
- Uploading Local Files to CVM
- Copying Local Files to CVMs
- Uploading Files from MacOS to Windows CVM Using MRD
- Uploading Files from Linux to Windows CVM using RDP
- Uploading Files from Linux to a CVM Using FTP
- Uploading files via WinSCP to a Linux CVM from Windows
- Uploading Files from Windows to a CVM Using FTP
- Uploading Files from Linux or MacOS to Linux CVM via SCP
- Uploading Files from Windows to a Windows CVM via MSTSC
- Other CVM Operations
- CVM Access to COS via a Private Network
- Recovering Data on Linux CVMs
- Managing Disk Space on Windows CVMs
- Changing Kernel of a Linux Instance Manually
- Setting Up Windows-based AD Domain on a CVM
- Network Performance Test
- High-throughput Network Performance Test
- Using USB/IP to Share USB Devices in Linux
- Using RemoteFx to Redirect USB Devices in Windows
- Using AVX-512 Instructions to Accelerate AI Applications on CVM
- Building Tencent SGX Confidential Computing Environment
- Configuring Persistent Memory in M6p Instances
- Calling Cloud APIs via Python to Share Custom Images in Batches
- Operations Guide
- Initializing Data Disks
- Environment Configurations
- Installing Software
- User Data
- Work with Operating Systems
- System Activation
- System Updates
- System Shutdown
- Configuring High-performance Power Management
- Windows Recovery Mode
- Use of the atop Monitoring Tools by Linux Instances
- Ensuring Unique SIDs for CVMs Using Sysprep
- Modifying VNC Resolution
- Introduction to Linux Kernel Parameters
- Updating the Virtio ENI Driver
- Modifying SID
- Others
- Troubleshooting
- Instance-Related Failures
- CVM Login Failures
- Windows Instance Login Failures
- Windows Instance Login Failures
- An authentication error occurred when you tried to log in to a Windows instance remotely
- Failed to Reset the CVM Password or the CVM Password Is Invalid
- Windows instance: no remote Desktop license server can provide license
- Requires network-level identity verification
- Problems occurred when you tried to log in to a Windows CVM remotely on Mac
- Failed to log in to a Windows CVM due to high CPU and memory usage
- Failed to connect to a remote computer through Remote Desktop
- Credentials Not Work
- Connection to a Windows CVM through Remote Desktop was denied
- Remote Login Failure Due To Port Issues
- Linux Instance Login Failures
- Linux Instance Login Failures
- Unable to Log in to a Linux Instance via SSH Key
- Failing to log in to a Linux CVM due to high CPU and memory usage
- Remote Login Failure due to Port Issues
- VNC Login Error (Module is Unknown)
- VNC Login Error (Account Locked due to XXX Failed Logins)
- VNC Login Error (Login Failed with Correct Password)
- VNC or SSH Login Error (Permission Denied)
- Login Failure Due to /etc/fstab Configuration Errors
- sshd Configuration File Permissions
- Infinite Loop Call in /etc/profile
- Login Failure Due to Server Isolation
- Login Failure Due to High Bandwidth Occupation
- Remote Connect Failure Due to Security Group Settings
- Troubleshooting Linux Instance Issues via VNC and Rescue Mode
- Failed to shut down or restart a CVM
- Network Namespace Creation Failure
- Kernel and IO Issues
- Missing System bin or lib Soft Link
- Suspected Infection with Virus
- "no space left on device" Error During File Creation
- Linux CVM Memory Issues
- Network Related Failures
- Instance-Related Failures
- API Documentation
- History
- Introduction
- API Category
- Making API Requests
- Region APIs
- Instance APIs
- DescribeInstances
- DescribeInstanceFamilyConfigs
- DescribeZoneInstanceConfigInfos
- DescribeInstanceTypeConfigs
- DescribeInstancesOperationLimit
- DescribeInstanceVncUrl
- InquiryPriceRunInstances
- InquiryPriceResetInstance
- InquiryPriceResetInstancesType
- InquiryPriceResizeInstanceDisks
- RunInstances
- StartInstances
- RebootInstances
- StopInstances
- ResetInstance
- TerminateInstances
- ResetInstancesType
- ResizeInstanceDisks
- ResetInstancesPassword
- ModifyInstancesAttribute
- ModifyInstancesProject
- InquirePricePurchaseReservedInstancesOffering
- DescribeReservedInstancesConfigInfos
- DescribeInstancesStatus
- PurchaseReservedInstancesOffering
- Cloud Hosting Cluster APIs
- Placement Group APIs
- Image APIs
- Key APIs
- Security Group APIs
- Network APIs
- Instance Launch Template APIs
- Data Types
- Error Codes
- FAQs
- Related Agreement
- Glossary
Login Failure Due to /etc/fstab Configuration Errors
Last updated: 2022-08-12 15:06:28
Error Description
Error: Unable to remotely log in to the Linux CVM via SSH. After logging in to the CVM via VNC, you can check the system start-up failure and view the prompt message "Welcome to emergency mode".
Possible Causes
The /etc/fstab is not properly configured.
For example, you've configured the auto-attaching of disk based on device name in the /etc/fstab file. If the device name is changed when the CVM restarts, this configuration will cause the system to fail to start up normally.
Solutions
See Steps to repair the /etc/fstab configuration file. Then, restart the CVM to verify the repaired file.
Steps
You can access the instance in the following 2 methods for troubleshooting:
- Log in to Linux Instances (VNC).
- After entering the VNC interface, you see the interface shown in Error Description. Enter the root account password and press Enter to log in to the server.
- The entered password is not displayed by default.
- If you do not have or forgot the root account password, see Method 2 for troubleshooting.
- Run the following command to back up the
/etc/fstabfile to the/homedirectory, for example:cp /etc/fstab /home - Run the following command to use VI editor to open the
/etc/fstabfile.vi /etc/fstab - Press i to enter the edit mode. Move the cursor to the beginning of the error line and enter
#to comment out this configuration.NoteIf you cannot determine the error, it is recommended that you comment out the configurations of all attached disks except the system disks, and then configure the file as instructed in Step 8 after the server recovers.
- Press Esc, enter :wq, and press Enter to save the configuration and exit the editor.
- Restart the instance in the CVM console to see if it can be started and logged in properly.Note
Restart the instance through the console. For more information, see Restarting Instances.
- After successful login, if you need to configure the auto-attaching of the disk, see Cloud Disk Automount Failed upon Linux CVM Restart.
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