Raspbian Jessie
Display WiFi config using Linux command iwconfig
Iwconfig is similar to ifconfig(8), but is dedicated to the wireless interfaces. It is used to set the parameters of the network interface which are…
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raspberry pi
Search for available package, and know the version before install
apt-cache is a low-level tool used to query information from APT's binary cache files. You can search available package with" $ apt-cache s…
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raspberry pi
Python to get uptime of Raspberry Pi, in second
In linux, the command " $ cat /proc/uptime " shows how long the system has been on since it was last restarted. ~ http://en.wikipedia.org/…
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raspberry pi
List all Linux command available - compgen
To list all available Linux command can be run: $ compgen -c To list all command start with "ls" $ compgen -c ls To list all command contai…
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raspberry pi
How to list info of installed package
dpkg-query is a tool to show information about packages listed in the dpkg database. Examples:
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raspberry pi 2
Read CPUs frequency of Raspberry Pi 2
There are 4 cpu core on Raspberry Pi 2. ls /sys/devices/system/cpu show 4 cpu, cpu0~cpu3. The files hold the scaling current frequency of each cpu. /…
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raspberry pi
Get CPU load from /proc/loadavg
/proc The proc filesystem is a pseudo-filesystem which provides an interface to kernel data structures. It is commonly mounted at /proc. Most of it…
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raspberry pi
View dynamic system info with Linux command top and htop
$ top The top program provides a dynamic real-time view of a running system. It can display system summary information as well as a list of processes…
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raspberry pi
Linux command: blkid - locate/print block device attributes
The Linux command blkid is used to display information about available block devices.
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raspberry pi
Read Raspberry Pi CPU temperature
In Raspbian, the file /sys/class/thermal/thermal_zone0/temp keep the CPU temperature, in 1000 (C degree). We can read Raspberry Pi CPU temperature …
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raspberry pi
List installed package with dpkg
Enter the dpkg command with -l option to list installed packabe: $ dpkg -l
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raspberry pi
/etc/apt/sources.list, packages sources
As part of its operation, Apt uses a file that lists the 'sources' from which packages can be obtained. This file is /etc/apt/sources.list. S…
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