To install wireguard VPN on ubuntu, run
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apt update apt install software-properties-common apt install linux-headers-$(uname -r) add-apt-repository ppa:wireguard/wireguard apt-get update apt-get install wireguard |
Generate Keys
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cd /etc/wireguard umask 077 wg genkey > privatekey cat privatekey | wg pubkey > publickey |
Configure wireguard You can generate wireguard configuration using https://www.wireguardconfig.com […]
On my local computer, i have installed openssh-server, but i don’t want it always enabled. To disable openssh-server from auto start on boot, run
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systemctl disable ssh |
Example
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root@lab:~# systemctl disable ssh Synchronizing state of ssh.service with SysV service script with /lib/systemd/systemd-sysv-install. Executing: /lib/systemd/systemd-sysv-install disable ssh Removed /etc/systemd/system/sshd.service. Removed /etc/systemd/system/multi-user.target.wants/ssh.service. root@lab:~# |
If you want to start ssh server on boot, run systelctl enable ssh
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root@lab:~# systemctl enable ssh Synchronizing state of ssh.service with SysV service script with /lib/systemd/systemd-sysv-install. Executing: /lib/systemd/systemd-sysv-install enable ssh Created symlink /etc/systemd/system/sshd.service → /lib/systemd/system/ssh.service. Created symlink /etc/systemd/system/multi-user.target.wants/ssh.service → /lib/systemd/system/ssh.service. root@lab:~# |
See Ubuntu […]
First you need to add VirtualBox repository
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sudo echo "deb [arch=amd64] https://download.virtualbox.org/virtualbox/debian bionic contrib" > /etc/apt/sources.list.d/virtualbox.list |
Add Keys
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wget -q https://www.virtualbox.org/download/oracle_vbox_2016.asc -O- | sudo apt-key add - wget -q https://www.virtualbox.org/download/oracle_vbox.asc -O- | sudo apt-key add - |
Do an apt upgrade
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sudo apt-get update |
If you have older version of VirtualBox installed, remove it
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sudo apt remove virtualbox virtualbox-dkms virtualbox-qt |
Install VirtualBox 6.1 with
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sudo apt-get install virtualbox-6.1 |
If you use Vagrant, you may need to install latest version as the vagrant provided by ubuntu won’t work with VirtualBox 6.1 […]
Ubuntu come with screen recorder, this can be activated with shortcut
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CTRL + ALT + SHIFT + R |
By default, it will record for 30 seconds. Video get saved in your home directory (/home/USERNAME) in webm format. If you want to increase time, you can run following command
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gsettings set org.gnome.settings-daemon.plugins.media-keys max-screencast-length TIME_IN_SECONDS_HERE |
It is better to set this to 0, this way record never […]
To install LAMP (Apache, MySQL, PHP) on Ubuntu/Debian web server, run
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apt-get install lamp-server^ |
This use meta package install LAMP. If you want to remove, don’t remove the meta package as it will remove many other required packages. You need to remove packages one by one. Related Posts Apache MySQL […]
Time Doctor is an application to track time. To uninstall Time Doctor on Ubuntu, run
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sudo /bin/bash -c 'apt purge sfproc; /bin/bash /opt/sfproc/uninstall' |
Time doctor run following process
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root@pc8:~# ps aux | grep sfp root 7884 0.0 0.1 72848 4316 pts/1 S 09:53 0:00 sudo -H -u training /bin/bash -l -c export DISPLAY=:0; export XAUTHORITY=/run/user/1004/gdm/Xauthority; export DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1004/bus,guid=be774defc4c97a1711ff06305e2fb38d; export TD_DEVELOPER=; export XDG_CURRENT_DESKTOP=ubuntu:GNOME; export XDG_SESSION_DESKTOP=ubuntu; export XDG_SESSION_ID=2; cd /home/training; /opt/sfproc/SF/sfproc/3.0.64/sfproc &> /dev/null training 7889 0.0 0.0 19992 3148 pts/1 S 09:53 0:00 /bin/bash -l -c export DISPLAY=:0; export XAUTHORITY=/run/user/1004/gdm/Xauthority; export DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1004/bus,guid=be774defc4c97a1711ff06305e2fb38d; export TD_DEVELOPER=; export XDG_CURRENT_DESKTOP=ubuntu:GNOME; export XDG_SESSION_DESKTOP=ubuntu; export XDG_SESSION_ID=2; cd /home/training; /opt/sfproc/SF/sfproc/3.0.64/sfproc &> /dev/null training 7893 4.4 1.2 1407988 51724 pts/1 SLl 09:53 0:00 /opt/sfproc/SF/sfproc/3.0.64/sfproc root 7947 0.0 0.0 21536 976 pts/1 S+ 09:54 0:00 grep --color=auto sfp root@pc8:~# |
[…]
Ubuntu Server 20.04 set static IP with netplan Ubuntu Server 20.04 configure OVH failover IP […]
On my computer running Ubuntu 18.04, MriaDB stopped working. PHP application i run on my computer failed with error
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SQLSTATE[42S02]: Base table or view not found: 1146 Table 'ok_test.feeds' doesn't exist (SQL: select * from `feeds` where `processed` = 0) |
Application can’t find the table. So i tried to login to MySQL and see if table is there or not. But i get error
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boby@sok-01:~$ mysql Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 2504 Server version: 10.2.30-MariaDB-1:10.2.30+maria~bionic-log mariadb.org binary distribution Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. MariaDB [(none)]> show databases; ERROR 1018 (HY000): Can't read dir of '.' (errno: 24 "Too many open files") MariaDB [(none)]> |
Next i checked if this is due to any MySQL […]
On Ubuntu, Google chrome had a disable native notification option. On Chrome 78, this option is removed. But you still can manually enable it. To enbale chrome notification, edit file
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gedit ~/.config/google-chrome/Local\ State |
Find
Replace with
Save and exit the file. Now restart google chrome. Related Posts Google Chrome […]
To install NextCloud desktop client on Ubuntu, add PPA
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sudo add-apt-repository ppa:nextcloud-devs/client sudo apt-get update |
Now run
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sudo apt install nextcloud-client |
After install, start nextcloud client, you will be able to login with nextcloud server URL, user and password. […]