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Issues with Ubuntu 20.04 on AMD Ryzen 7 4800H and GeForce GTX 1660 Ti

August 4, 2020 · admin Linux Ubuntu 20.04 ASUS

UPDATE: Ubuntu 20.10 fixes the issues listed below.

Script to create a shared git project

July 2, 2016 · admin Unix Ubuntu Linux GIT

This script creates a git project to be shared among the users of the Unix group $GIT\_GROUP. Every git project will be created into the directory $REPOSITORIES\_BASE\_DIR.

Make Linux use the hardware clock set to local time

June 3, 2016 · admin Ubuntu Linux

Ubuntu sometimes assumes that the hardware clock of the computer is set to GMT. If the hardware clock is set to local time, set UTC=no in /etc/default/rcS.

Move and secure the MySQL data directory

May 28, 2016 · admin Ubuntu Linux MySQL

By default, the data directory of MySQL is /var/lib/mysql. This can be a security issue, especially on a laptop. If your home directory is encrypted, you can easily secure you MySQL data. Backup you data before using this information. Read the procedure until the end before doing anything. First, follow these steps to move the data directory of MySQL.

Interrupt NodeMCU init.lua

November 24, 2015 · admin Linux ESP8266 NodeMCU IoT Internet of Things

It can be sometimes challenging to regain control of the NodeMCU running on a ESP8266 when init.lua has a tight loop in it. To do so, first, download esptool.py from GitHub. Execute the following command

Make an Apache2 SSL server more secure

June 3, 2015 · admin Unix Ubuntu Linux Debian apache

These easy steps will improve significantly the security of your Apache2 SSL server. Edit your /etc/apache2/mods-enabled/ssl.conf file and replace the SSLProtocol, SSLCipherSuite and SSLHonorCipherOrder parameters with the following values. SSLCipherSuite ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA SSLHonorCipherOrder on SSLProtocol all -SSLv2 -SSLv3

How to Install libnfc for PN532 NFC Readers on Linux

February 25, 2015 · admin Ubuntu 11.10 Ubuntu 11.04 Ubuntu Linux Ubuntu 12.04 Ubuntu 14.04 PN532 GO2NFC

Installing libnfc for PN532 based NFC reader is not exactly as described in the documentation. Some information is scattered in the documentation. This installation guide has been tested with the GO2NFC GO2NFC141U NFC Reader and the Adafruit PN532 NFC/RFID controller breakout board. 1) Install the dependencies: sudo apt-get install libusb-0.1-4 libusb-dev libpcsclite1 libpcsclite-dev libccid pcscd 2) Create the configuration directory sudo mkdir -p /etc/nfc/devices.d/ 3) Create the file /etc/nfc/devices.d/pn532\_uart.conf containing name = "PN532 board via UART" connstring = pn532_uart:/dev/ttyACM0 allow_intrusive_scan = true Replace ttyACM0 with ttyUSB0 if you are using the Adafruit reader. 5) Create the file /etc/nfc/libnfc.conf containing allow_autoscan = true 6) Download the libnfc library at https://bintray.com/nfc-tools/sources/libnfc. Decompress the archive somewhere. Go into the libnfc-x.x.x directory. 7) Build the library sudo ./configure --sysconfdir=/etc --prefix=/usr --with-drivers=pn532_uart sudo make sudo make install 8) Test your installation. Execute the command utils/nfc-scan-device. You should get an output similar to this one: nfc-scan-device uses libnfc 1.7.1 1 NFC device(s) found: - pn532_uart:/dev/ttyACM0: pn532_uart:/dev/ttyACM0

How To Setup an Internet Gateway using Ubuntu

February 18, 2015 · admin Ubuntu 11.10 Ubuntu 11.04 Ubuntu Linux Ubuntu 12.04 Ubuntu 14.04 Networking

Setting up an Internet Gateway using Ubuntu is pretty straight forward. In order to do so, you will need:

Java Applets are no longer working in Linux

September 24, 2014 · admin Linux Ubuntu 14.04 Java Applets Chrome

NPAPI support was dropped in Chrome version 35 introduced in Spring 2014. One of the consequences is that Java Applets running with IcedTea no longer works. Upgrading to Ubuntu 14.04 install the newest version of Chrome. You then lose the ability to run IcedTea in Chrome. The only alternative I have found is using Firefox.

How to restore the Arduino Bootloader?

July 2, 2014 · admin Linux Arduino Hardware

It can be easily done using Linux. This procedure is for the 328p processor. It can easily be adapted for a 168 processor. You will need an ICSP. First, make sure that avrdude is installed. It can be installed by issuing the command: sudo apt-get install avrdude You will need to retrieve the bootloader. It can be found in the hardware/arduino/bootloaders/atmega directory in the 1.0.5 Arduino IDE download. It is named ATmegaBOOT\_168\_atmega328.hex.

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