


Solve the problem of dracut when installing centos7 on USB disk
1. When this step of installation occurs, enter cd / in dracut:/# dev Press Enter and enter ls to check the U disk device name. Generally, the number after sdb is the U disk. For example, sdb4 is my U disk
2. Restart the server. Re-enter the installation interface, press the tab key and the installation boot vmlinuz initrd.img inst.stage2=hd:LABEL=centOS\x207\x20x86_64 rd.live.check quiet change this paragraph to vmlinuz initrd.img inst.stage2=hd :/dev/sdb4 quiet Press Enter and start installing the system
Recommended tutorial: "CentOS Tutorial"
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CentOS is the first choice for server and enterprise environments for its superior security, stability and performance. 1) Security provides forced access control through SELinux to improve system security. 2) Stability is supported by the LTS version for up to 10 years to ensure the stability of the system. 3) Performance significantly improves system response speed and resource utilization by optimizing kernel and system configuration.

CentOS alternatives should have the characteristics of stability, compatibility, community support and package management. 1.AlmaLinux provides 10 years of support, 2. RockyLinux is initiated by the founder of CentOS to ensure compatibility with CentOS. Migration cost and performance optimization should be considered when choosing.

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CentOS is widely used in server management and web hosting. Specific methods include: 1) using yum and systemctl to manage the server, 2) install and configure Nginx for web hosting, 3) use top and mpstat to optimize performance, 4) correctly configure the firewall and manage disk space to avoid common problems.

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