How to solve the garbled graphics interface of centos7?
It is found that Chinese garbled characters and Chinese fonts are not neat (overlapping) in the report. The first thing to consider is whether the operating system has Chinese fonts. In CentOS 7, it is found that entering the command to view the font list is a prompt command. Invalid:
As you can see from the picture above, not only are there no Chinese fonts, there are not even font libraries. So next, let’s record how to install the font library and Chinese fonts in Linux CentOS 7.
Installing the font library
In CentOS 4.x, fontconfig is used to install the font library, so enter the following command:
yum -y install fontconfig
When viewing When you get the prompt information in the picture below, it means that the installation has been successful:
You can see fonts and fonts in the /usr/shared
directory. fontconfig directory (it didn’t exist before):
Next, we can add Chinese fonts to our font library.
Add Chinese fonts
In CentOS, the font library is stored in the fonts directory seen in the picture above, so the first thing we have to do is to find the Chinese The font files are placed in this directory, and the Chinese font files can be found in our windows system. Open the Windows/Fonts directory under the c drive:
As shown above, we only need to Just copy the fonts and upload them to the Linux server. Here I choose Song and Hei (these two fonts are used in the report). You can see that there are two files with the suffix ttf and ttc:
Before this we also need to create a new directory. First create a new directory chinese in the /usr/shared/fonts directory:
Then just upload the above two fonts to the /usr/shared/fonts/chinese
directory:
Next, you need to modify the permissions of the chinese directory:
chmod -R 755 /usr/share/fonts/chinese
Next, you need to install ttmkfdir to search for all font information in the directory, and summarize and generate the fonts.scale file. Enter the command:
yum -y install ttmkfdir
When you see the prompt message below, the installation has been successful:
Then execute the ttmkfdir command:
ttmkfdir -e /usr/share/X11/fonts/encodings/encodings.dir
The last step is to modify the font configuration file. First open the configuration file through the editor:
vi /etc/fonts/fonts.conf
You can see a Font list, that is, the font list. Here we need to add the Chinese font location Add in:
Then enter: wq to save and exit. Finally, don’t forget to refresh the font cache in the memory, so that you don’t need to reboot:
fc-cache
This way all Even if the steps are completed, finally look at the font list through fc-list again:
You can see that the Chinese font has been successfully installed, and the installation process is complete. At the end, check the report again and you will find that the Chinese style and content can be displayed normally.
Related reference: centOS tutorial
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The best way to migrate from CentOS is to choose RockyLinux, AlmaLinux, or UbuntuServer. 1) Back up data, 2) Evaluate existing systems, 3) Test migration, 4) Perform migration, 5) Verify and optimize to ensure the best system performance.

CentOS has stopped maintaining and has moved to CentOSStream and no longer provides a production-friendly version. Impacts include system migration and enterprise reevaluation of Linux policies. Alternatives are: 1. Migrate to RHEL, 2. Turn to Ubuntu or Debian, 3. Consider CentOSStream as a test platform, 4. Use AlmaLinux or RockyLinux. It is recommended to develop a migration plan as early as possible to evaluate existing system and team needs.

Use Ansible to implement automated management of CentOS. The specific steps include: 1) writing a playbook to define tasks, such as installing and configuring Apache; 2) executing the playbook through the SSH protocol to ensure consistency of system configuration; 3) using conditional judgment and loop functions to handle complex scenarios; 4) optimizing performance and following best practices, such as using asynchronous tasks and optimizing inventory files.

Frequently asked questions and answers to CentOS interview include: 1. Use the yum or dnf command to install software packages, such as sudoyumininstallnginx. 2. Manage users and groups through useradd and groupadd commands, such as sudouseradd-m-s/bin/bashnewuser. 3. Use firewalld to configure the firewall, such as sudofirewall-cmd--permanent-add-service=http. 4. Set automatic updates to use yum-cron, such as sudoyumininstallyum-cron and configure apply_updates=yes.

How to diagnose and solve common problems in CentOS system? First, check the startup log to solve the failure of system startup; second, check the network configuration file to solve the network problem; finally, use the Yum command to solve the package management problem. Through these steps, you can effectively diagnose and resolve common problems in CentOS systems.

CentOS server security reinforcement can be achieved through the following steps: 1. Keep the system software updated and use the "sudoyumupdate-y" command; 2. Disable unnecessary services, such as "sudosystemctldisablecups&&sudosystemctlstopcups"; 3. Configure SELinux as mandatory mode, use the "sudosetenforce1&&sudosed-i's/SELINUX=permissive/SELINUX=enforcing/g'/etc/selinux/config" command; 4. Regularly

Advanced command line management skills of CentOS include: 1. Use systemctl to manage system services, 2. Use top to monitor system resources, 3. Use yum to manage software packages, 4. Use find and xargs to batch process files, 5. Use rsync to optimize file copying. These techniques can improve productivity, solve common problems, and optimize system performance.


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