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ubuntu_tips_tricks_and_notes [2024/12/26 08:26] mikeubuntu_tips_tricks_and_notes [2025/07/17 20:33] (current) – [Post-Installation] mike
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 === Disable IPv6 === === Disable IPv6 ===
-The recommend method to disable IPv6 on Ubuntu 18.04 after reboot is to configure the GRUB boot loader to pass kernel parameter during the boot time+To disable IPv6 on Ubuntu during boot timeopen the /etc/default/grub file using your favorite text editor with root privileges and change/add:
- +
-To do so open the /etc/default/grub file using your favorite text editor with root privileges and change/add:+
   FROM:   FROM:
   GRUB_CMDLINE_LINUX_DEFAULT=""   GRUB_CMDLINE_LINUX_DEFAULT=""
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   GRUB_CMDLINE_LINUX_DEFAULT="ipv6.disable=1"   GRUB_CMDLINE_LINUX_DEFAULT="ipv6.disable=1"
   GRUB_CMDLINE_LINUX="ipv6.disable=1"   GRUB_CMDLINE_LINUX="ipv6.disable=1"
-Once you have made the above change within the /etc/default/grub file execute the following commands to apply the GRUB changes:+Once you have made the above change within the /etc/default/grub file execute the following command to apply the GRUB changes:
   sudo update-grub   sudo update-grub
 +  
 +Reboot the system afterwards.
  
 === Enable console screen blanking === === Enable console screen blanking ===
-Edit the /etc/default/grub file using your favorite text editor with root privileges and add the string **consoleblank=600** to the GRUB_CMDLINE_LINUX_DEFAULT and GRUB_CMDLINE_LINUX lines for a 10-minute timeout.  Save the file and apply the GRUB changes:+Edit the /etc/default/grub file using your favorite text editor with root privileges and add the string **consoleblank=600** to the GRUB_CMDLINE_LINUX_DEFAULT and GRUB_CMDLINE_LINUX lines for a 10-minute timeout.   
 + 
 +Once you have made the above change within the /etc/default/grub file execute the following command to apply the GRUB changes:
   sudo update-grub   sudo update-grub
 +
 +Reboot the system afterwards.
  
 === To install Samba: === === To install Samba: ===
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 === Install phpmyadmin === === Install phpmyadmin ===
 +
   sudo apt update   sudo apt update
-  sudo apt install phpmyadmin+  sudo apt install phpmyadmin php-mbstring php-zip php-gd php-json php-curl 
 +  sudo phpenmod mbstring 
 +  sudo systemctl restart apache2
   mysql   mysql
 +  mysql> SELECT user,authentication_string,plugin,host FROM mysql.user;
   mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '<password>';   mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '<password>';
 +
 +=== Installing Portainer to manage Docker containers ===
 +
 +  sudo docker run -d -p 9443:9443 -p 8000:8000 --name portainer --restart=always -v /var/run/docker.sock:/var/run/docker.sock -v portainer_data:/data portainer/portainer-ce:latest
  
 === Disable interactive restart prompt while upgrading packages with apt === === Disable interactive restart prompt while upgrading packages with apt ===
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 ''$nrconf{restart} = 'a';'' (if we want to restart the services automatically) or ''$nrconf{restart} = 'l';'' to simply list the services that need restart. ''$nrconf{restart} = 'a';'' (if we want to restart the services automatically) or ''$nrconf{restart} = 'l';'' to simply list the services that need restart.
 +
 +==== Ubuntu Desktop (Gnome/GUI) Stuff ====
 +
 +=== Set login screen default resolution ===
 +  - Login and set the screen resolution as desired.
 +  - Once set, copy the file **~/.config/monitors.xml** to **/var/lib/gdm3/.config/monitors.xml**.
 +  - Ensure the user/group ownership is set to **gdm.gdm**.
 +  - Reboot the system to apply the changes.
 +
 +=== Eliminating the annoying repeated authentication dialogs when logging in via xrdp ===
 +Edit the file **/etc/polkit-1/localauthority/50-local.d/45-allow-colord.pkla**; paste the following config into it and then save it:
 +
 +  [Allow Colord all Users]
 +  Identity=unix-user:*
 +  Action=org.freedesktop.color-manager.create-device;org.freedesktop.color-manager.create-profile;org.freedesktop.color-manager.delete-device;org.freedesktop.color-manager.delete-profile;org.freedesktop.color-manager.modify-device;org.freedesktop.color-manager.modify-profile
 +  ResultAny=no
 +  ResultInactive=no
 +  ResultActive=yes
 +
 +If the issue persists afterwards, a reboot of the system should resolve it.
ubuntu_tips_tricks_and_notes.1735230417.txt.gz · Last modified: by mike

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