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What Should I Do If I Cannot View Data After Logging In to an ECS Using VNC? After you log in to an ECS using VNC and view data, for example, play videos or run the cat command to view large files in Linux OSs, VNC may become unavailable due to the high memory usage of the browser
What Should I Do If Executing a Driver Installation Script Failed on an ECS Running CentOS 5? Scenarios After executing the script for installing the Virtio driver on an ECS running CentOS 5, users cannot determine whether the driver has been successfully installed. This section describes
How Can I Use OBS to Transfer Files from a Local Windows Computer to a Windows ECS? Scenarios Through an intranet, an ECS can access OBS in which any type of data can be stored. After storing data such as images and videos in OBS, you can access OBS from the ECS and download data
How Can I Use SCP to Transfer Files Between a Local Linux Computer and a Linux ECS? Scenarios You want to use SCP to transfer files between a local Linux computer and a Linux ECS. Procedure Log in to the management console. On the Elastic Cloud Server page, obtain the EIP bound to
How Can I Use FTP to Transfer Files Between a Local Linux Computer and a Linux ECS? Scenarios You want to use FTP on a local Linux computer to transfer files between the computer and a Linux ECS. Prerequisites You have enabled FTP on the target ECS. If you have not enabled FTP, check
What Should I Do If Attaching a Disk to a Windows ECS Failed But There Are Still Available Device Names? Symptom On the Windows ECS details page, the system displays a message indicating that at most n more disks can be attached to the ECS. However, after you clicked Attach Disk,
How Can I Rectify the Fault That May Occur on a Linux ECS with an NVMe SSD Disk Attached? Symptom When a Linux ECS with an NVMe SSD disk attached, such as a P1 ECS, becomes faulty, you must contact the administrator to remotely rebuild the ECS again. If automatic NVMe SSD disk attachment
Why Are Disk Error Logs Printed After a Disk Attached to an ECS Is Formatted with the ext4 File System? Symptom When a VBD disk is attached to an ECS and the partition is in ext4 format, the following log may be displayed on the console: blk_update_request: operation not supported
What Should I Do If the One-Click Password Reset Plug-ins Installed on a Linux ECS Fail to Be Started? Scenarios The one-click password reset plug-ins installed on a Linux ECS fail to be started. Symptom When a user ran sudo sh setup.sh to install one-click password reset plug-ins
How Can I Use WinSCP to Transfer Files from a Local Windows Computer to a Linux ECS? Scenarios WinSCP can be used to securely copy-paste files across local and remote computers. Compared with FTP, WinSCP allows you to use a username and password to access the destination server without
Why Can't I Obtain the Password for Logging In to My Windows ECS Authenticated Using a Key Pair? Symptom A private key cannot be used to obtain the password for logging in to a Windows ECS that is authenticated using a key pair. Possible Causes The password fails to inject using Cloudbase-Init
How Can I Use SFTP to Transfer Files Between a Local Linux Computer and a Linux ECS? Scenarios You want to use SFTP to transfer files between a local Linux computer and a Linux ECS. The following uses CentOS as an example. Procedure Log in to the ECS as user root. Run the following
How Can I Allow or Deny Login from Specific Users or IP Addresses to an ECS Using SSH? Scenarios This section describes how to allow or deny specific users or IP addresses to access an ECS using SSH. Constraints DenyHosts has been installed on the ECS. Restarting the sshd service
Why Do the Modifications to /etc/security/limits.conf Not Take Effect After the ECS Restarts? Symptom Modifications to the /etc/security/limits.conf file become invalid after the ECS restarts. Possible Causes In Linux, file /etc/security/limits.conf and directory /etc/security/limits.d
What Can I Do If /etc/resolv.conf Is Restored After an ECS Running Ubuntu Is Restarted? Symptom After an ECS running Ubuntu or network-related services are restarted, the /etc/resolv.conf file is updated, and the nameserver field is restored to 127.0.0.53. Figure 1 Symptom Possible
Why Does My Linux ECS Fail to Access the Internet After Port 80 Is Allowed by the Firewall Rules? Symptom The Linux ECS cannot access the Internet after port 80 is allowed by the firewall rules. After the firewall is disabled, access to the Internet succeeds. Possible Causes The possible
Why Does the System Display a Message Indicating Invalid Credentials When I Attempt to Access a Windows ECS? Symptom When you use a local PC running Windows to access a Windows ECS using RDP (for example, MSTSC), the system displays a message indicating that the credentials are invalid
How Can I Use FTP to Transfer Files from a Local Windows Computer to a Windows or Linux ECS? Scenarios You want to use FTP to transfer files from a local Windows computer to an ECS. Prerequisites An EIP has been bound to the ECS and access to TCP port 21 is allowed in the inbound
How Can I Check Whether the ECSs Attached with the Same Shared SCSI Disk Are in the Same ECS Group? Scenarios Shared EVS disks of the SCSI type support SCSI locks. To improve data security, the shared EVS disks of the SCSI type must be attached to the ECSs in the same anti-affinity
How Do I Enable My ECS to Boot From the Second Kernel If It Fails to Boot from the First Kernel? Scenarios The operations described in this section apply to ECSs running CentOS or EulerOS with at least two kernels installed. CentOS 6 Log in to the management console, restart the ECS
