This tutorial will help you to install Let’s encrypt client on your Ubuntu system and issue SSL certificate for the domain.AT SPI stands for Assistive Technology Service Provider Interface, a framework to integrate accessibility functions in applications. After that it issue certificate for you. Let’s Encrypt do a DNS check for the domain, that domain is pointed to the current server. The certificates can only be requested from there server where the domain is pointed.

Unneeded for GNOME Shell users.A GNOME Keyring agent which will provide access to your encryption certificates for applications.Command: /usr/bin/gnome-keyring-daemon –-start –-components=pkcs11Status: unwanted if you don’t use encryption certificates.The Disk Utility notification is used to report disk failures using the SMART predictive technology.Command: /usr/lib/gnome-disk-utility/gdu-notification-daemonStatus: recommended if your disks support the SMART, to discover incoming damages.Alarm notifier for Evolution incoming events and appointments.Command: /usr/lib/evolution/3.0/evolution-alarm-notifyStatus: unwanted if you don’t use the Evolution calendar alarms.The nautilus file manager for desktop icons.Status: unwanted until you choose to enable the desktop with its icons.Play a sound from the sound theme after the login to welcome the user. That’s why the installation and configuration are quite quick to do.Command: /usr/lib/at-spi2-core/at-spi-bus-launcher –-launch-immediatelyStatus: unwanted until you need the accessibility features.The AT SPI Registry is used by applications to interact with assistive technologies and peripherals.Command: /usr/lib/at-spi/at-spi-registrydA GNOME classic applet for the GNOME panel to provide access to bluetooth devices configuration.Status: unwanted until you use GNOME fallback session and you make use of the Bluetooth technology. Unlike in RHEL-based distributions where Certbot is not available in the official repositories, it is in Ubuntu. Install Let’s Encrypt (Cerbot) on Ubuntu 20.04.

This also will lock the screen when the computer is left alone for some minutes.Status: recommended for everyone until you use another screen saver application.The GNOME Keyring components that contains the personal saved passwords for various applications (Evolution, WiFi) will be unlocked to grant the applications the right to read their saved passwords.Command: /usr/bin/gnome-keyring-daemon –-start –-components=secretsStatus: generally wanted if you save passwords into applications.A GNOME Keyring agent for SSH which will load your SSH keys from ~/.ssh in order to grant applications access to your SSH keys.Command: /usr/bin/gnome-keyring-daemon –-start –-components=sshStatus: unwanted if you don’t use SSH keys.A GNOME classic applet for GNOME panel to let the user to arrange the volume of the audio.Status: unwanted until you use GNOME fallback session. This requires the Vino server was enabled in system preferences.Status: unwanted until you’re absolutely sure what are doing.The screen saver relies on this component to start automatically after the desired time indicated in the system preferences. GNOME users don’t require this at all.The Vino server is a VNC server for incoming connections to the desktop, allowing others users to connect, view and operate in the desktop. This doesn’t apply to sudo/su/gksu requests.Command: /usr/lib/polkit-gnome/polkit-gnome-authentication-agent-1A GNOME daemon that communicates with the hardware for proper power management, stand by, suspend and reduce power consumption by underclocking the CPU.A print job manager for CUPS to allow the user to be notified of printing and about new plugged printers to install.The PulseAudio system offers a sound server for multiple sound sources and communicates with the underlying audio architecture (the most common in GNU/Linux are ALSA and OSS) to mix multiple audio with multiple audio cards and manage volume for each application.Status: recommended for everyone until you have not a sound card working.The PulseAudio starter for KDE.

Ubuntu Vino Disable Encryption