Linux command
crda 命令
安全
权限或系统影响较大，执行前请核对目标。
常用示例
Set the regulatory domain
sudo crda
Manually trigger regulatory
sudo crda --help
Check current regulatory settings
iw reg get
Set regulatory country
sudo iw reg set [US]
说明
CRDA (Central Regulatory Domain Agent) is a userspace agent that provides wireless regulatory domain information to the Linux kernel. It responds to kernel requests for regulatory rules based on the configured country code. The Linux wireless subsystem requires knowledge of regional regulations that control which frequencies, power levels, and modes wireless devices can use. Different countries have different legal restrictions on wireless spectrum, and CRDA ensures devices comply by loading the appropriate rules from a signed regulatory database. CRDA runs automatically when the kernel needs regulatory information, typically during boot or when wireless devices are configured. The regulatory database contains country-specific rules covering permissible frequency ranges, maximum transmission power, DFS (Dynamic Frequency Selection) requirements, and indoor/outdoor restrictions. CRDA verifies the cryptographic signature of the database to prevent tampering with regulatory rules.
参数
- --help
- Display help information.
- --version
- Display version information.
FAQ
What is the crda command used for?
CRDA (Central Regulatory Domain Agent) is a userspace agent that provides wireless regulatory domain information to the Linux kernel. It responds to kernel requests for regulatory rules based on the configured country code. The Linux wireless subsystem requires knowledge of regional regulations that control which frequencies, power levels, and modes wireless devices can use. Different countries have different legal restrictions on wireless spectrum, and CRDA ensures devices comply by loading the appropriate rules from a signed regulatory database. CRDA runs automatically when the kernel needs regulatory information, typically during boot or when wireless devices are configured. The regulatory database contains country-specific rules covering permissible frequency ranges, maximum transmission power, DFS (Dynamic Frequency Selection) requirements, and indoor/outdoor restrictions. CRDA verifies the cryptographic signature of the database to prevent tampering with regulatory rules.
How do I run a basic crda example?
Run `sudo crda` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
What does --help do in crda?
Display help information.