I followed this guide, run the following command from WSL:
ssh -L 59000:localhost:5901 -C -N -l dmitriano $VNC_IP
and was able to connect with UltraVNC client:
Installed FireFox browser as described here.
(more…)Category Archives: Ubuntu
How I installed VNC on Ubuntu 22.04
Connecting to Ubuntu 22.04 with Remote Desktop
I simply installed:
sudo apt install ubuntu-desktop-minimal -y
sudo apt install xrdp -y
systemctl status xrdp
and was able to connect with Remote Desktop from Windows as root user:
Creating Windows Application Icon on Ubuntu 22.04
Install magick tool:
sudo apt update
sudo apt install imagemagick
Copy *.png files to a folder, for example:
win16x16.png
win32x32.png
win48x48.png
win64x64.png
and run the following command:
convert *.png winapp.ico
OpenVPN in a Docker container
Run a docker container:
export MY_IP=$(curl -s https://api.ipify.org)
sudo docker run -it --rm --cap-add=NET_ADMIN -p 1194:1194/udp -e HOST_ADDR=$MY_IP --name dockovpn alekslitvinenk/openvpn
or
sudo docker run -it --rm --cap-add=NET_ADMIN -p 1194:1194/udp -e HOST_ADDR=$MY_IP --name dockovpn alekslitvinenk/openvpn -v openvpn_conf:/opt/Dockovpn_data
to persist generated files in volume storage.
Type Ctrl+P then Ctrl+Q to turn interactive mode to daemon mode.
Determine its IP address:
sudo docker ps
sudo docker inspect dockovpn | grep IPAddress
Building QT6.4 on Ubuntu 22.04
I installed required packages:
sudo apt install build-essential
sudo apt install libx11-dev
sudo apt install ninja-build
sudo apt install openssl libssl-dev
sudo apt install libmd4c-dev libmd4c-html0-dev
sudo apt install pkg-config
sudo apt install mesa-utils libglu1-mesa-dev freeglut3-dev mesa-common-dev
sudo apt install libglew-dev libglfw3-dev libglm-dev
sudo apt install libao-dev libmpg123-dev
How I fixed my contact form
When I switched to PHP 7.4 I forgot to specify sendmail_path parameter in php.ini and my contact form stopped working. Today I found sendmail_path parameter in PHP 7.0:
cd /etc/php
find . -name "php.ini"
./7.0/fpm/php.ini
./7.0/cgi/php.ini
./7.0/cli/php.ini
./7.4/fpm/php.ini
./7.4/cli/php.ini
grep sendmail ./7.0/fpm/php.ini
sendmail_path = "/usr/sbin/sendmail -t -f *****@yandex.ru -i"
Converting WAV files with Sox
Source file:
soxi short-borrowed-old.wav
Input File : 'short-borrowed-old.wav' (flac)
Channels : 2
Sample Rate : 44100
Precision : 16-bit
Duration : 00:00:00.60 = 26460 samples = 45 CDDA sectors
File Size : 54.0k
Bit Rate : 720k
Sample Encoding: 16-bit FLAC
Comment : 'Comment=Processed by SoX'
Switching to PHP 7.4 on Ubuntu 16.04
Some WordPress plugins stopped working with PHP 7.0 on my Ubuntu 16.04 server and I switched to PHP 7.4 with the following commands:
sudo add-apt-repository ppa:jczaplicki/xenial-php74-temp
sudo apt-get update
sudo apt-get install php7.4 php7.4-fpm php7.4-cli php7.4-mysql php7.4-dom php7.4-mbstring -y
service php7.4-fpm status
cd /etc/php/7.4/fpm/pool.d
sudo mv www.conf www.conf.dist
sudo mv ../../../7.0/fpm/pool.d/devnote.conf .
sudo service php7.0-fpm reload
sudo service php7.4-fpm reload
“Server certificate verification failed” error with command line Git client
Some guy described the same situation about 10 years ago on stackoverflow.com and there was another discussion about 7 years ago.
First I did:
GIT_CURL_VERBOSE=1 git clone https://git.developernote.com/examples.git
Cloning into 'examples'...
* Couldn't find host git.developernote.com in the .netrc file; using defaults
* Trying 139.162.243.103...
* TCP_NODELAY set
* Connected to git.developernote.com (139.162.243.103) port 443 (#0)
* found 129 certificates in /etc/ssl/certs/ca-certificates.crt
* found 387 certificates in /etc/ssl/certs
* ALPN, offering http/1.1
* SSL connection using TLS1.2 / ECDHE_RSA_AES_256_GCM_SHA384
* server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none
* stopped the pause stream!
* Closing connection 0
fatal: unable to access 'https://git.developernote.com/examples.git/': server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none
Compiling Awl on Ubuntu 18 and 20 with GCC 11
Below I provided the instruction on how to build Awl on Ubuntu 18 and 20.
On Ubuntu 18 you do an extra step to install CMake version >= 3.12:
wget -O - https://apt.kitware.com/keys/kitware-archive-latest.asc 2>/dev/null | sudo apt-key add -
sudo apt-add-repository 'deb https://apt.kitware.com/ubuntu/ bionic main'
sudo apt update
Then do the following steps on both Ubuntu 18 and 20:
sudo apt install cmake
cmake --version
