Upgrade of fishfish

Last updated 2020-12-25 by Adam Lu

Upgraded from Ubuntu 18.04 LTS to Ubuntu 20.04 LTS:

First applied these commands using the alias updateall:

sudo apt-get update -y
sudo apt-get upgrade -y
sudo apt-get dist-upgrade -y
sudo apt-get autoremove -y

Performed upgrade using the command:
```
sudo do-release-upgrade -d
```
Series of questions:

Applied these commands again using the alias updateall:

sudo apt-get update -y
sudo apt-get upgrade -y
sudo apt-get dist-upgrade -y
sudo apt-get autoremove -y

Desktop issue: wouldn’t load (stuck on dev/sda1: clean message, which is a (normal) output of fsck).
- Fixed after removing NVIDIA drivers:
```
sudo apt-get purge nvidia*
```
Server automatically hibernates (Only started happening after desktop issue was fixed)
- Tried this approach to prevent from automatically hibernating
```
sudo systemctl mask sleep.target suspend.target hibernate.target hybrid-sleep.target  
```
VNC server issue: the command vncserver disappeared.
- Tried re-installing VNC Server this way:
```
sudo apt-get install vnc4server
```
  But got this message:
  
  Package vnc4server is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source
  
  E: Package ‘vnc4server’ has no installation candidate
- Installed VNC Server from this website:
```
sudo dpkg -i /media/shareX/Software/vnc4server_4.1.1+X4.3.0+t-1_amd64.deb
```
  However, there is a dependency on Tiger VNC:
  
  Preparing to unpack vnc4server_4.1.1+X4.3.0+t-1_amd64.deb … Unpacking vnc4server (4.1.1+X4.3.0+t-1) … dpkg: dependency problems prevent configuration of vnc4server: vnc4server depends on tigervnc-standalone-server; however: Package tigervnc-standalone-server is not installed.
  
  dpkg: error processing package vnc4server (–install): dependency problems - leaving unconfigured Errors were encountered while processing: vnc4server
- Therefore, tried this:
```
# First installed Tiger VNC, which vnc4server apparently depends on
sudo apt-get install tigervnc-standalone-server
      
# Installed this file downloaded from the website
sudo dpkg -i /media/shareX/Software/vnc4server_4.1.1+X4.3.0+t-1_amd64.deb
```
- However, this would still cause Tiger VNC to be used.
- Therefore, removed the above:
```
  sudo apt-get remove tigervnc-standalone-server
  sudo apt-get remove vnc4server
```
- Tried to install Real VNC server from its website:
```
sudo dpkg -i VNC-Server-6.7.2-Linux-x86.deb
```
  But encountered the message:
  
  dpkg: dependency problems prevent configuration of realvnc-vnc-server:i386: realvnc-vnc-server:i386 depends on libxtst6.
  
  dpkg: error processing package realvnc-vnc-server:i386 (–install): dependency problems - leaving unconfigured
- Therefore, tried this:
```
  sudo apt-get install libxtst6:i386
```
  Which successfully unpacks realvnc-vnc-server:i386, but causes a license error upon trialing vncserver:
  
  VNC(R) Server 6.7.2 (r42622) x86 (May 13 2020 19:10:53) Copyright (C) 2002-2020 RealVNC Ltd. RealVNC and VNC are trademarks of RealVNC Ltd and are protected by trademark registrations and/or pending trademark applications in the European Union, United States of America and other jurisdictions. Protected by UK patent 2481870; US patent 8760366; EU patent 2652951. See https://www.realvnc.com for information on VNC. For third party acknowledgements see: https://www.realvnc.com/docs/6/foss.html OS: Ubuntu 20.04, Linux 5.4.0, amd64
  
  Generating private key… done Error: No license keys found. Run vnclicense to apply the license key associated with your Enterprise subscription. [NoLicense]
- Therefore, removed the above:
```
  sudo apt-get remove libxtst6:i386
```
- Tried to install the same version as chalkboard’s VNC server from this site:
```
sudo dpkg -i vnc4server_4.1.1+xorg4.3.0-37.3ubuntu2_amd64.deb
```
  And got this message:
  
  Selecting previously unselected package vnc4server. (Reading database … 392995 files and directories currently installed.) Preparing to unpack vnc4server_4.1.1+xorg4.3.0-37.3ubuntu2_amd64.deb … Unpacking vnc4server (4.1.1+xorg4.3.0-37.3ubuntu2) … dpkg: dependency problems prevent configuration of vnc4server: vnc4server depends on xbase-clients; however: Package xbase-clients is not installed.
  
  dpkg: error processing package vnc4server (–install): dependency problems - leaving unconfigured Processing triggers for man-db (2.9.1-1) … Errors were encountered while processing: vnc4server
- Therefore, tried this:
```
  sudo apt-get install xbase-clients
```
  This allowed vncserver to be installed. However, no sessions could be opened:
  
  adam@fishfish:~$ vnclarge
  
  New ‘fishfish:1 (adam)’ desktop is fishfish:1
  
  Starting applications specified in /etc/X11/Xvnc-session Log file is /home/adam/.vnc/fishfish:1.log
  
  adam@fishfish:~$ vncsessions There are no processes running for the command vnc!
  
  The first output looked different from chalkboard’s (/etc/X11/Xvnc-session vs /home/adam/.vnc/xstartup):
  
  adam@chalkboard:~$ vnclarge
  
  New ‘chalkboard:2 (adam)’ desktop is chalkboard:2
  
  Starting applications specified in /home/adam/.vnc/xstartup Log file is /home/adam/.vnc/chalkboard:2.log
- Tried the following:
  - Removed files in ~/.vnc not present in chalkboard:
    rm ~/.vnc/config.d/Xvnc rmdir ~/.vnc/config.d rm ~/.vnc/private.key
  - Removed files in /etc/X11 not present in chalkboard:
    sudo rm /etc/X11/xorg.conf* sudo rm -r /etc/X11/Xvnc-session sudo rm /etc/X11/vncserver-virtual-*
  - Removed folder /etc/vnc, which is not present in chalkboard:
    sudo mv /etc/vnc /etc/vnc-backup-20201225
  - Output becomes this but still not using $HOME/.vnc/xstartup:
    
    New ‘fishfish:1 (adam)’ desktop is fishfish:1
    
    Creating default startup script /etc/X11/Xvnc-session Starting applications specified in /etc/X11/Xvnc-session Log file is /home/adam/.vnc/fishfish:1.log
    
    Note that /etc/X11/Xvnc-session doesn’t actually get created
  - Removed extra packages not existent in chalkboard:
    sudo apt-get remove xserver-xorg-video-nvidia-396
  - Tried removing the .Xauthority file:
    rm ~/.Xauthority
    Similar output:
    
    adam@fishfish:~$ vnclarge
    
    xauth: file /home/adam/.Xauthority does not existNew ‘fishfish:1 (adam)’ desktop is fishfish:1
    
    Creating default startup script /etc/X11/Xvnc-session Starting applications specified in /etc/X11/Xvnc-session Log file is /home/adam/.vnc/fishfish:1.log
  - Tried creating /etc/vnc/xstartup based on this thread:
    sudo mkdir /etc/vnc sudo cp ~/.vnc/xstartup /etc/vnc/xstartup sudo chmod 775 /etc/vnc/xstartup
    Same output
  - Tried creating /etc/X11/Xvnc-session using custom startup file:
    sudo cp ~/.vnc/xstartup /etc/X11/Xvnc-session sudo chmod 775 /etc/X11/Xvnc-session
  Finally fixed it:
```
  > New 'fishfish:1 (adam)' desktop is fishfish:1
  >
  > Starting applications specified in /etc/X11/Xvnc-session
  > Log file is /home/adam/.vnc/fishfish:1.log
```

Settings_Linux

Useful bash scripts and settings for managing a Linux server

Upgrade of fishfish