How to Install a GUI and Set Up VNC on CentOS Cloud Servers
If you need to use a graphical user interface on a CentOS cloud server—for example, to install Oracle using its GUI installer—how should you proceed? Today, I’ll walk you through installing a desktop environment and setting up VNC to solve this problem.
The installation process may clear your DNS settings, so make sure to run the following command first before proceeding…
Installation steps are as follows:
1. Install via yum yum install subversion
2. Create the SVN repository directory, the location can be set arbitrarily: mkdir -p /var/svn/svnrepos
3. Create the repository svnadmin create /var/svn/svnrepos After executing this command, it will create files under /var/svn/svnr …
For easier management, especially when dealing with many machines, passwordless login becomes essential.
Simulated scenario: Machine A wants to log into Machine B via SSH without a password:
Machine A IP: 192.168.0.100 Machine B IP: 192.168.0.223
1. Log into 192.168.0.100 and generate a public/private key pair for Machine A …
Many people use the history command, which by default lists all operations of the current user. However, many Linux distributions have history configured without user and timestamp information, which makes it difficult to review past operations. After checking the man page …
When downloading and installing Yunsuo, the following occurs:
It gets stuck here.
Cause:
System language issue.
Solution:
Press “Ctrl + c” to end the installation –># export LC_ALL=C # Temporarily switch the system locale to C –>Install Yunsuo again …
There are two methods to fix this issue:
1. In .bashrc, comment out Alias cp=’cp -i’
2. Use the /cp command (add a ‘/’ before cp) …
How to SSH into a Remote Server on a Non-Standard Port
Example: If the port is 20086, the user is “user”, and the IP is 192.168.0.111, here is the connection method:
ssh -p 20086 [email protected]
If the server user is root, you can omit the username: …
Following Baidu’s separation from Jiasule, Baidu launched its own acceleration product: Baidu Cloud Accelerator. However, for webmasters, the free version of Baidu Cloud Accelerator offers very few nodes, and imposes certain restrictions on traffic and DDoS protection. The following shows Baidu Cloud Accelerator…
How to Change the Default SSH Port on CentOS (Example: 8223):
vi /etc/ssh/sshd_config
Change: #Port 22
to
Port 8223Restart SSH:
service sshd restart
Add a firewall exception:
#/sbin/iptables -I INPUT -p tcp –dport 8223 -j ACCEPT
#/e …
Scenario: You have a bunch of machines. The server IP being accessed is 192.168.1.1, and the IP address allowed to access it is 192.168.1.2. No need to list the rest since they won’t be used anyway.
For Linux systems, the connection method is basically SSH, which can be controlled through configuration files …
