How
do I find out details about my Linux Laptops temperature, battery
status and other information from the command prompt? How can I check
battery status using the terminal on Linux?
The information regarding your battery status and ACPI is stored in /proc and /sys file system. The easiest way to read this information is using the following commands:
upower command
: A command line tool for UPower which provides an interface to
enumerate power sources on the system and control system-wide power
management./li>
acpi command : Shows battery status and other ACPI information from /proc and /sys file system.
/sys/class/power_supply/BAT0/ directory : Store ACPI information about your first battery.
Use upower command to check battery status from command line
Type the following command $ upower -i /org/freedesktop/UPower/devices/battery_BAT0 Sample outputs:
native-path: /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0A:00/power_supply/BAT0
vendor: Samsung SDI
model: DELL 1C75X35
serial: 1820
power supply: yes
updated: Tuesday 21 January 2014 06:01:52 PM IST (1757 seconds ago)
has history: yes
has statistics: yes
battery
present: yes
rechargeable: yes
state: fully-charged
energy: 98.235 Wh
energy-empty: 0 Wh
energy-full: 98.235 Wh
energy-full-design: 98.235 Wh
energy-rate: 0.0111 W
voltage: 12.864 V
percentage: 100%
capacity: 100%
technology: lithium-ion
Use apci command to check battery status using terminal
The acpi command may not be installed by default so use apt-get command or yum command to install the same: $ sudo yum install acpitool OR $ sudo apt-get install acpitool Sample outputs from Ubuntu LTS 12.04 laptop:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following package was automatically installed and is no longer required:
nvidia-settings-experimental-310
Use 'apt-get autoremove' to remove them.
The following NEW packages will be installed:
acpitool
0 upgraded, 1 newly installed, 0 to remove and 4 not upgraded.
Need to get 46.3 kB of archives.
After this operation, 156 kB of additional disk space will be used.
Get:1 http://in.archive.ubuntu.com/ubuntu/ precise/universe acpitool amd64 0.5.1-3 [46.3 kB]
Fetched 46.3 kB in 1s (37.6 kB/s)
Selecting previously unselected package acpitool.
(Reading database ... 539294 files and directories currently installed.)
Unpacking acpitool (from .../acpitool_0.5.1-3_amd64.deb) ...
Processing triggers for man-db ...
Setting up acpitool (0.5.1-3) ...
Linux check battery command
Type the following command: $ acpi -V Sample outputs:
Battery 0: Full, 100%
Battery 0: design capacity 8400 mAh, last full capacity 8044 mAh = 95%
Adapter 0: on-line
Thermal 0: ok, 53.5 degrees C
Thermal 0: trip point 0 switches to mode critical at temperature 107.0 degrees C
Cooling 0: LCD 0 of 15
Cooling 1: Processor 0 of 10
Cooling 2: Processor 0 of 10
Cooling 3: Processor 0 of 10
Cooling 4: Processor 0 of 10
Cooling 5: Processor 0 of 10
Cooling 6: Processor 0 of 10
Cooling 7: Processor 0 of 10
To just see status, enter: $ acpi Sample outputs:
Battery 0: Charging, 17%, 01:20:06 until charged
See ac adapter information
$ acpi -a Sample outputs:
Adapter 0: on-line
The above output indicates that laptop is plugged in use i.e. connected.
Show thermal information
$ acpi -t Sample outputs
Thermal 0: ok, 39.5 degrees C
To use fahrenheit as the temperature unit: $ acpi -tf To use kelvin as the temperature unit: $ acpi -tk
Use /proc/acpi/ directory to get laptop battery info (deprecated method)
You can browse the same data by visiting /proc/acpi/ directory: $ cd /proc/acpi/ $ ls -l Sample outputs:
OR $ cat /proc/acpi/thermal_zone/THM/temperature Sample outputs:
temperature: 55 C
Use /sys/class/power_supply/BAT0/ directory to get battery info
As of Linux kernel 2.6.x you need to use /sys/class/power_supply/BAT0 directory: $ ls -l /sys/class/power_supply/BAT0 Sample outputs:
total 0
-rw-r--r-- 1 root root 4096 Jan 21 18:13 alarm
-r--r--r-- 1 root root 4096 Jan 21 18:01 charge_full
-r--r--r-- 1 root root 4096 Jan 21 18:01 charge_full_design
-r--r--r-- 1 root root 4096 Jan 21 18:01 charge_now
-r--r--r-- 1 root root 4096 Jan 21 18:01 current_now
-r--r--r-- 1 root root 4096 Jan 21 18:13 cycle_count
lrwxrwxrwx 1 root root 0 Jan 21 18:13 device -> ../../../PNP0C0A:00
-r--r--r-- 1 root root 4096 Jan 21 18:01 manufacturer
-r--r--r-- 1 root root 4096 Jan 21 18:01 model_name
drwxr-xr-x 2 root root 0 Jan 21 18:13 power
-r--r--r-- 1 root root 4096 Jan 21 18:01 present
-r--r--r-- 1 root root 4096 Jan 21 18:01 serial_number
-r--r--r-- 1 root root 4096 Jan 21 18:01 status
lrwxrwxrwx 1 root root 0 Jan 21 18:01 subsystem -> ../../../../../../class/power_supply
-r--r--r-- 1 root root 4096 Jan 21 18:01 technology
-r--r--r-- 1 root root 4096 Jan 21 18:01 type
-rw-r--r-- 1 root root 4096 Jan 21 18:01 uevent
-r--r--r-- 1 root root 4096 Jan 21 18:01 voltage_min_design
-r--r--r-- 1 root root 4096 Jan 21 18:01 voltage_now
Use GUI tool find out battery status on Linux
The gnome-power-statistics
is the gui program for the gnome power management infrastructure. It
allows users to visualize the power consumption of laptop hardware. Type
the following command to view stats or click on GUI power icon located
on right side: $ gnome-power-statistics Sample outputs: Fig.01: Linux Battery Monitor / Stats GUI App
How
do I find out details about my Linux Laptops temperature, battery
status and other information from the command prompt? How can I check
battery status using the terminal on Linux?
No comments:
Post a Comment