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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raspbian
How to know the current Overclock setting
To know the current Overclock setting on Raspbian, enter the command: $ cat /boot/config.txt For more options and information see http://www.raspberr…
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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
scp copy folder
Linux command scp option -r recursively copy entire directories. Note that scp follows sym‐bolic links encountered in the tree traversal. To copy …
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raspberry pi
Linux command "$ sudo !!", to run last command with sudo
To run last command with sudo right, enter: $ sudo !!
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raspberry pi
Linux command tree, list contents of directories in a tree-like format
The Linux command tree list contents of directories in a tree-like format. To install trr on Raspberry Pi, enter the command: $ sudo apt-get install…
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raspberry pi
Linux command free, display amount of free and used memory in the Raspberry Pi system
The Linux command free - Display amount of free and used memory in the system
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raspberry pi
Check your Raspberry Pi board revision
To find the board revision of your Raspberry Pi, enter the following command: $ cat /proc/cpuinfo The number in Revision identify the board revision…
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raspberry pi
Scan network using nmap command
On host pc running Linux, we can scan network using nmap command to determine the IP of connected Raspberry Pi. $ sudo nmap -sP 192.168.1.1-254
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raspberry pi
Play mp3 on Raspberry Pi
To play mp3 on Raspberry Pi, using omxplayer command: example: $ omxplayer HelloWorld.mp3
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raspberry pi
scp, easiest way to copy file from Linux PC to Raspberry Pi
Example: $ scp HelloWorld.mp3 pi@192.168.1.105:~/
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raspberry pi
Shell script to check Raspberry Pi temperature
The following command print the Raspberry Pi CPU temperature: $ cat /sys/class/thermal/thermal_zone0/temp Shell script, chktemp.sh, with the followin…
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raspberry pi
Shell script to check Raspberry Pi CPU frequency
The following command show the CPU current frequency: $ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq Create a shell script, chkspeed.sh,…
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