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This article mainly introduces how to use the sysfs file system in linux to check the battery status of the notebook, which has a certain reference value, and interested friends can refer to it. I hope you can learn a lot after reading this article.

How to use the sysfs file system to view the battery status of a laptop

The sysfs file system is a pseudo file system that provides kernel data structure interfaces. The files under sysfs provide information about devices, kernel modules, file systems, and other kernel components.

The sysfs file system is usually mounted at / sys. In general, it is automatically mounted by the system, but it can also be mounted manually using commands such as mount-t sysfs sysfs / sys.

Many files in the sysfs file system are read-only, but some are writable, allowing kernel variables to be changed. To avoid redundancy, symbolic links are widely used to connect entries in the number of file systems.

$cat / sys/class/power_supply/BAT0/*051Normal0cat: / sys/class/power_supply/BAT0/device: Is a directory522600006000000026660000SMPL14M4P23cat: / sys/class/power_supply/BAT0/power: Is a directory276560001 756Chargingcat: / sys/class/power_supply/BAT0/subsystem: Is a directoryLi-ionBatteryPOWER_SUPPLY_NAME=BAT0POWER_SUPPLY_STATUS=ChargingPOWER_SUPPLY_PRESENT=1POWER_SUPPLY_TECHNOLOGY=Li-ionPOWER_SUPPLY_CYCLE_COUNT=0POWER_SUPPLY_VOLTAGE_MIN_DESIGN=14800000POWER_SUPPLY_VOLTAGE_NOW=15840000POWER_SUPPLY_POWER_NOW=27656000POWER_SUPPLY_ENERGY What are the versions of FULL_DESIGN=60000000POWER_SUPPLY_ENERGY_FULL=52260000POWER_SUPPLY_ENERGY_NOW=26660000POWER_SUPPLY_CAPACITY=51POWER_SUPPLY_CAPACITY_LEVEL=NormalPOWER_SUPPLY_MODEL_NAME=L14M4P23POWER_SUPPLY_MANUFACTURER=SMPPOWER_SUPPLY_SERIAL_NUMBER= 7561480000015840000Linux? the versions of Linux are Deepin, UbuntuKylin, Manjaro, LinuxMint, Ubuntu and so on. Among them, Deepin is one of the best-developed Linux distributions in China; UbuntuKylin is a derivative release based on Ubuntu; Manjaro is a Linux release based on Arch; LinuxMint's default Cinnamon desktop is similar to Windows XP's easy-to-use; Ubuntu is the Linux operating system based on desktop applications.

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