Abhay Patil's questions

PFA the current partitions on my disk. The second partition (selected one) is the swap partition (8gb), but recently I upgraded ram and want to make swap 16gb.

I get this message when using systemctl hibernate:

 Failed to hibernate system via logind: Not enough swap space for hibernation

Originally I wanted to shrink nvme0n1p3 and shift it towards right end and then expand the 2nd partition. However life isn't so easy and Gparted doesn't allow those kind of operations (at least I wasn't able to figure that out).

Another idea I have is to delete the swap partition, and expand the nvme0n1p3 partition to left, and the shrink it from right to make space for swap. However I am not sure whether that will work or is that the best way to go around it. Also if I do this, are there any chances that GRUB would somehow manage to not boot into my OS. I have only one OS, no dual boot.

Can someone pls guide me.

Other people have a screen-sharing option in the settings->sharing. But I don't have it. From this answer, I realized that the minimal installation is the root cause. Although I have tried that solution, it won't show for me.

I need that option for using obs screen-recorder on Wayland. This project needs that screen-sharing option to be enabled, so I can record the complete screen.

Expected:

What I see

How to disable super+s shortcut on Ubuntu 20.04. I have tried the compiz manager and then going to expo and then disabling expo key. But it won't work. I want to bind this shortcut for some other app.

If it makes any difference, I use Wayland and not X11.

I have tried the following solutions
How to use <super>+w/a/s/d as shortcuts?
Disable super + s in ubuntu 13.04

On doing sudo apt upgrade, I get the following error (or warning, not sure what it is):

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
  libnvidia-cfg1-440 libnvidia-compute-440 libnvidia-compute-440:i386 libnvidia-decode-440 libnvidia-decode-440:i386 libnvidia-encode-440 libnvidia-encode-440:i386
  libnvidia-extra-440 libnvidia-fbc1-440 libnvidia-fbc1-440:i386 libnvidia-gl-440 libnvidia-gl-440:i386 libnvidia-ifr1-440 libnvidia-ifr1-440:i386
  nvidia-compute-utils-440 nvidia-driver-440 nvidia-kernel-common-440 nvidia-kernel-source-440 nvidia-utils-440 xserver-xorg-video-nvidia-440
0 upgraded, 0 newly installed, 0 to remove and 20 not upgraded.

I found the solution (run sudo apt install <package-name>). I also found out why it does so. It is because the newer version has unmet dependencies.

But my doubt is, is it safe to do sudo apt install <package-name>, or will the system take care of it in a few days. If so, then how many days would it take to resolve this on its own?

EDIT 1:
My current Nvidia Drivers are 440.

What I have observed is that there is uneven spacing in the text in the man pages. Between some words there is a single space, where as some words have a double spacing.

What I have observed is that this double spacing is only between the first line of the DESCRIPTION and just after the first full stop of any paragraph.

Is there any reason for this? This is definitely not random (or a bug) as stated above there is a pattern. This has really irked my curiosity.

This what I see after I run man more. But I have observed this on almost every man page I have seen. I have tried this on my virtual machine also, so not a system bug (or glitch).

On VLC website, it says that it is supported for only release 16.04 and 18.04.

But when I run sudo apt install vlc directly in the terminal, it did install vlc. So, how did it work on 20.04?

I also tried to add their PPA (sudo add-apt-repository ppa:videolan/stable-daily), but it showed release file error, which also confirms that they have not released it for 20.04.

So, how does it work with sudo apt install vlc.

Ubuntu has an inbuilt screen recorder/screencast.

The default location it saves is ~/Videos. But I want to change it to ~/Videos/Screenrecord or something other than the default location. Can someone help me to do that.

I know it has been asked here, but it was marked unhelpful, which I think is wrong, as it has more than a few hundred views. So I would like to open it again.

EDIT 1:
I have tried dconf editor, but there is no option for this. Only option is to set max time limit of recording.

I had originally installed Windows 10 on my PC on SSD. Then I decided to dual boot Ubuntu alongside but on HDD. The grub was installed on the HDD, hence to see the GRUB menu, I had to select HDD (named as Ubuntu in BIOS, and SSD was named Windows Boot Manager) in the boot priority.

Now I installed Ubuntu on SSD and formatted the SSD while installing. I was expecting to get rid of Windows. But in the BIOS, the SSD is still named as Windows Boot Manager instead of Ubuntu, and when SSD is selected first in boot priority, it opens recovery mode. I see GRUB only when I HDD is placed first in the boot priority.

So, how do I remove the Windows Boot Manager from SSD, and make It Ubuntu. So that when I select SSD first in Boot priority, it directly boots into Ubuntu without opening the grub.

Boot priority:

Windows Error Recovery Mode:

Grub boot menu:

The output of sudo os-prober :

/dev/sdb2@/EFI/Microsoft/Boot/bootmgfw.efi:Windows Boot Manager:Windows:efi
/dev/sdb3:Ubuntu 20.04 LTS (20.04):Ubuntu:linux
/dev/sdb4:Pop!_OS 20.04 LTS (20.04):Pop:linux

Here the Ubuntu on the sdb3 disk is the Ubuntu installed earlier, the newer Ubuntu on SSD is not shown.

I deleted the /boot/efi/EFI/Microsoft/, now the Windows Boot Manager has been removed, but the SSD is not available to boot into directly.

New boot priority options:

I wanted to get rid of the Windows Boot Manager, which I did by removing the/boot/efi/EFI/Microsoft/ folder.

When I was using Windows, I could select SSD or HDD the first option in boot priority. When I selected SSD which had Windows 10 installed on it, I would boot directly to the Windows, without any GRUB prompt. But when I selected the HDD, I would get the GRUB prompt with windows, Ubuntu and Pop!_OS as the options.

Now I want to achieve similar results, just that instead of Windows, I want to use Ubuntu on the SSD. So that when SSD is selected first in the boot priority, it would boot into Ubuntu on the SSD without any GRUB prompt, but when I select the HDD first in the boot priority, I would get the GRUB prompt, to select the Ubuntu (from SSD), Ubuntu (from HDD) or Pop!_OS.

Now the problem is that I cannot see the SSD in the BIOS boot priority as seen in the 4th screen photo. Earlier I could select SSD or HDD like in the 1st screen photo. Windows Boot Manager being the SSD and the other OS being the HDD.

I have acer Predator helios 300 PH315-51. I wish to shift to Ubuntu full time and remove Windows 10. However the only thing holding me back is the Predator Sense software, which is available for Windows 10 only. It basically allows you to control the fan speed and monitor the CPU and GPU temperatures. I have managed to get other 3rd party app to monitor temperatures, however I could not find a software to control the fan speed. Is there any way in which I can install Predator Sense on Ubuntu, or any other software to control the fan speeds.

EDIT 1:
I tried to use wine, but when I run the setup file for predator sense, there is a loading cursor, and then it disappears. And that is it. I tried to run this multiple times.

EDIT 2:
I tried using fancontrol but when I run sudo pwmconfig, I get the following error.

This program will search your sensors for pulse width modulation (pwm)
controls, and test each one to see if it controls a fan on
your motherboard. Note that many motherboards do not have pwm
circuitry installed, even if your sensor chip supports pwm.

We will attempt to briefly stop each fan using the pwm controls.
The program will attempt to restore each fan to full speed
after testing. However, it is ** very important ** that you
physically verify that the fans have been to full speed
after the program has completed.

/usr/sbin/pwmconfig: There are no pwm-capable sensor modules installed

EDIT 3:
Basically I am still looking a way to run Predator Sense on Ubuntu through some sort of compatibility layer or any other fan control method that works, given that lm-sensors does not detect the fan of my laptop.

EDIT 4:
The fan sensor isn't detected. See the output of sensors:

abhay@abhay:~$ sensors
coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +46.0°C  (high = +100.0°C, crit = +100.0°C)
Core 0:        +45.0°C  (high = +100.0°C, crit = +100.0°C)
Core 1:        +46.0°C  (high = +100.0°C, crit = +100.0°C)
Core 2:        +43.0°C  (high = +100.0°C, crit = +100.0°C)
Core 3:        +43.0°C  (high = +100.0°C, crit = +100.0°C)
Core 4:        +43.0°C  (high = +100.0°C, crit = +100.0°C)
Core 5:        +44.0°C  (high = +100.0°C, crit = +100.0°C)

pch_cannonlake-virtual-0
Adapter: Virtual device
temp1:        +53.0°C  

iwlwifi_1-virtual-0
Adapter: Virtual device
temp1:        +44.0°C  

BAT1-acpi-0
Adapter: ACPI interface
in0:          16.68 V  
curr1:         0.00 A  

I have few slides sent by my professor. In those slides, each slide is embeded with an audio file. I want to view them as a video file.

In Microsoft Office PowerPoint for Windows, there is an option in export as to convert it to .mp4 format. What it does is make the slide as the image and puts the recorded voice as the audio file. And the output is a .mp4 file.

Is this type of export possible on Ubuntu 20.04 LTS. I have LibreOffice Impress in which under export as options, there is only a.pdf format option.

When I restart gnome-shell using alt + F2 + r major issues like:

1. Unresponsive windows
2. Unresponsive desktop
3. High RAM usage

get fixed perfectly. So, why exactly does it work and what exactly happens when you restart gnome-shell?

When I run ls -al ~/.local/share/gnome-shell/extensions I see

total 16
drwxrwxr-x 4 abhay abhay 4096 May 16 15:08 .
drwx------ 3 abhay abhay 4096 Jun  1 03:12 ..
drwxrwxr-x 4 abhay abhay 4096 May 16 15:02 [email protected]
drwxrwxr-x 4 abhay abhay 4096 May  3 15:28 [email protected]

When I run ls -al /usr/share/gnome-shell/extensions I see

total 20
drwxr-xr-x 5 root root 4096 Apr 23 13:05 .
drwxr-xr-x 7 root root 4096 May 23 01:14 ..
drwxr-xr-x 2 root root 4096 Apr 23 13:05 desktop-icons@csoriano
drwxr-xr-x 3 root root 4096 Apr 23 13:05 [email protected]
drwxr-xr-x 3 root root 4096 May 27 15:38 [email protected]

When I run free -h I see

             total        used        free      shared  buff/cache   available
Mem:          7.6Gi       1.5Gi       4.9Gi       289Mi       1.1Gi       5.5Gi
Swap:         4.0Gi          0B       4.0Gi

When I run top I see

top - 23:26:52 up 6 min,  1 user,  load average: 1.01, 1.02, 0.57
Tasks: 300 total,   1 running, 299 sleeping,   0 stopped,   0 zombie
%Cpu(s):  0.4 us,  0.2 sy,  0.0 ni, 99.3 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
MiB Mem :   7801.6 total,   5044.1 free,   1599.8 used,   1157.7 buff/cache
MiB Swap:   4096.0 total,   4096.0 free,      0.0 used.   5666.4 avail Mem 

    PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND                                                                          
   1757 abhay     20   0  912636 118792  79564 S   3.3   1.5   0:35.37 Xorg                                                                             
   2382 abhay     20   0  965964  49564  37136 S   3.3   0.6   0:05.89 gnome-terminal-                                                                  
   2002 abhay     20   0 4924592 277768 116092 S   2.3   3.5   0:36.19 gnome-shell                                                                      
   2608 abhay     20   0 2895956 378652 191188 S   0.7   4.7   0:35.07 Web Content                                                                      
      1 root      20   0  167704  11632   8480 S   0.3   0.1   0:03.13 systemd                                                                          
   1956 abhay     20   0  162812   7596   6816 S   0.3   0.1   0:00.20 at-spi2-registr                                                                  
   2496 abhay     20   0 3564084 393188 186492 S   0.3   4.9   1:03.71 firefox                                                                          
      2 root      20   0       0      0      0 S   0.0   0.0   0:00.00 kthreadd                                                                         
      3 root       0 -20       0      0      0 I   0.0   0.0   0:00.00 rcu_gp                                                                           
      4 root       0 -20       0      0      0 I   0.0   0.0   0:00.00 rcu_par_gp                                                                       
      5 root      20   0       0      0      0 I   0.0   0.0   0:00.00 kworker/0:0-cgroup_destroy                                                       
      6 root       0 -20       0      0      0 I   0.0   0.0   0:00.00 kworker/0:0H-kblockd                                                             
      7 root      20   0       0      0      0 I   0.0   0.0   0:00.06 kworker/0:1-events                                                               
      8 root      20   0       0      0      0 I   0.0   0.0   0:00.98 kworker/u24:0-events_unbound                                                     
      9 root       0 -20       0      0      0 I   0.0   0.0   0:00.00 mm_percpu_wq                                                                     
     10 root      20   0       0      0      0 S   0.0   0.0   0:00.00 ksoftirqd/0                                                                      
     11 root      20   0       0      0      0 I   0.0   0.0   0:00.41 rcu_sched                                                                        
     12 root      rt   0       0      0      0 S   0.0   0.0   0:00.00 migration/0                                                                      
     13 root     -51   0       0      0      0 S   0.0   0.0   0:00.00 idle_inject/0                                                                    
     14 root      20   0       0      0      0 S   0.0   0.0   0:00.00 cpuhp/0                                                                          
     15 root      20   0       0      0      0 S   0.0   0.0   0:00.00 cpuhp/1                                                                          
     16 root     -51   0       0      0      0 S   0.0   0.0   0:00.00 idle_inject/1                                                                    
     17 root      rt   0       0      0      0 S   0.0   0.0   0:00.06 migration/1                                                                      
     18 root      20   0       0      0      0 S   0.0   0.0   0:00.00 ksoftirqd/1                                                                      
     20 root       0 -20       0      0      0 I   0.0   0.0   0:00.00 kworker/1:0H-kblockd                                                             
     21 root      20   0       0      0      0 S   0.0   0.0   0:00.00 cpuhp/2                                                                          
     22 root     -51   0       0      0      0 S   0.0   0.0   0:00.00 idle_inject/2                                                                    
     23 root      rt   0       0      0      0 S   0.0   0.0   0:00.06 migration/2                                                                      
     24 root      20   0       0      0      0 S   0.0   0.0   0:00.00 ksoftirqd/2                                                                      
     26 root       0 -20       0      0      0 I   0.0   0.0   0:00.00 kworker/2:0H-kblockd                                                             
     27 root      20   0       0      0      0 S   0.0   0.0   0:00.00 cpuhp/3                                                                          
     28 root     -51   0       0      0      0 S   0.0   0.0   0:00.00 idle_inject/3                                                                    
     29 root      rt   0       0      0      0 S   0.0   0.0   0:00.07 migration/3                                                                      
     30 root      20   0       0      0      0 S   0.0   0.0   0:00.00 ksoftirqd/3                                                                      

When I run systemd-analyze blame I see

1min 30.122s nmbd.service                                         
     12.973s networkd-dispatcher.service                          
     11.924s udisks2.service                                      
     11.297s snapd.service                                        
      8.876s samba-ad-dc.service                                  
      7.313s dev-sdb3.device                                      
      5.269s NetworkManager.service                               
      5.225s accounts-daemon.service                              
      4.762s polkit.service                                       
      3.740s ModemManager.service                                 
      3.666s avahi-daemon.service                                 
      3.665s bluetooth.service                                    
      3.300s switcheroo-control.service                           
      3.295s thermald.service                                     
      3.292s wpa_supplicant.service                               
      3.291s systemd-logind.service                               
      2.996s dev-loop4.device                                     
      2.970s gpu-manager.service                                  
      2.881s dev-loop5.device                                     
      2.798s systemd-resolved.service                             
      2.622s dev-loop3.device                                     
      2.496s apport.service                                       
      2.443s grub-common.service                                  
      2.006s gdm.service                                          
      1.915s dev-loop0.device                                     
      1.761s rsyslog.service                                      
      1.756s secureboot-db.service                                
      1.640s grub-initrd-fallback.service                         
      1.373s dev-loop2.device                                     
      1.370s dev-loop1.device                                     
       995ms systemd-tmpfiles-setup.service                       
       823ms upower.service                                       
       816ms pppd-dns.service                                     
       776ms e2scrub_reap.service                                 
       738ms systemd-fsck@dev-disk-by\x2duuid-E866\x2d1E0F.service
       723ms systemd-modules-load.service                         
       717ms apparmor.service                                     
       713ms tlp.service                                          
       542ms systemd-sysusers.service                             
       541ms systemd-random-seed.service                          
       515ms systemd-timesyncd.service                            
       508ms snapd.seeded.service                                 
       507ms smbd.service                                         
       480ms systemd-journald.service                             
       457ms swapfile.swap                                        
       434ms systemd-udevd.service                                
       430ms systemd-udev-trigger.service                         
       347ms snapd.apparmor.service                               
       342ms keyboard-setup.service                               
       333ms snap-bitwarden-25.mount                              
       319ms colord.service                                       
       318ms snap-bitwarden-24.mount                              
       299ms snap-core18-1754.mount                               
       266ms snap-snapd-7264.mount                                
       256ms [email protected]                                 
       255ms snap-gtk\x2dcommon\x2dthemes-1506.mount              
       240ms systemd-backlight@backlight:intel_backlight.service  
       235ms snap-gnome\x2d3\x2d28\x2d1804-116.mount              
       227ms systemd-tmpfiles-setup-dev.service                   
       224ms kerneloops.service                                   
       213ms binfmt-support.service                               
       196ms systemd-sysctl.service                               
       182ms setvtrgb.service                                     
       175ms ufw.service                                          
       141ms openvpn.service                                      
       140ms geoclue.service                                      
       135ms [email protected]                                    
       127ms systemd-remount-fs.service                           
       106ms console-setup.service                                
       104ms plymouth-read-write.service                          
        98ms dev-hugepages.mount                                  
        97ms dev-mqueue.mount                                     
        96ms sys-kernel-debug.mount                               
        96ms sys-kernel-tracing.mount                             
        92ms kmod-static-nodes.service                            
        89ms systemd-user-sessions.service                        
        85ms boot-efi.mount                                       
        67ms systemd-tmpfiles-clean.service                       
        28ms systemd-update-utmp.service                          
        25ms rtkit-daemon.service                                 
        25ms proc-sys-fs-binfmt_misc.mount                        
        23ms systemd-journal-flush.service                        
        14ms systemd-update-utmp-runlevel.service                 
        13ms [email protected]                        
         9ms alsa-restore.service                                 
         4ms sys-fs-fuse-connections.mount                        
         3ms plymouth-quit-wait.service                           
         3ms sys-kernel-config.mount                              
       825us snapd.socket    

When I run cat /etc/fstab I see

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sdb3 during installation
UUID=729e17ba-8e24-41fb-ab2d-779ba62bfb60 /               ext4    errors=remount-ro 0       1
# /boot/efi was on /dev/sdb2 during installation
UUID=E866-1E0F  /boot/efi       vfat    umask=0077      0       1
/swapfile                                 none            swap    sw              0       0

When I run cat /etc/samba/smb.conf I see

#
# Sample configuration file for the Samba suite for Debian GNU/Linux.
#
#
# This is the main Samba configuration file. You should read the
# smb.conf(5) manual page in order to understand the options listed
# here. Samba has a huge number of configurable options most of which 
# are not shown in this example
#
# Some options that are often worth tuning have been included as
# commented-out examples in this file.
#  - When such options are commented with ";", the proposed setting
#    differs from the default Samba behaviour
#  - When commented with "#", the proposed setting is the default
#    behaviour of Samba but the option is considered important
#    enough to be mentioned here
#
# NOTE: Whenever you modify this file you should run the command
# "testparm" to check that you have not made any basic syntactic 
# errors. 

#======================= Global Settings =======================

[global]

## Browsing/Identification ###

# Change this to the workgroup/NT-domain name your Samba server will part of
   workgroup = WORKGROUP

# server string is the equivalent of the NT Description field
   server string = %h server (Samba, Ubuntu)

#### Networking ####

# The specific set of interfaces / networks to bind to
# This can be either the interface name or an IP address/netmask;
# interface names are normally preferred
;   interfaces = 127.0.0.0/8 eth0

# Only bind to the named interfaces and/or networks; you must use the
# 'interfaces' option above to use this.
# It is recommended that you enable this feature if your Samba machine is
# not protected by a firewall or is a firewall itself.  However, this
# option cannot handle dynamic or non-broadcast interfaces correctly.
;   bind interfaces only = yes



#### Debugging/Accounting ####

# This tells Samba to use a separate log file for each machine
# that connects
   log file = /var/log/samba/log.%m

# Cap the size of the individual log files (in KiB).
   max log size = 1000

# We want Samba to only log to /var/log/samba/log.{smbd,nmbd}.
# Append syslog@1 if you want important messages to be sent to syslog too.
   logging = file

# Do something sensible when Samba crashes: mail the admin a backtrace
   panic action = /usr/share/samba/panic-action %d


####### Authentication #######

# Server role. Defines in which mode Samba will operate. Possible
# values are "standalone server", "member server", "classic primary
# domain controller", "classic backup domain controller", "active
# directory domain controller". 
#
# Most people will want "standalone server" or "member server".
# Running as "active directory domain controller" will require first
# running "samba-tool domain provision" to wipe databases and create a
# new domain.
   server role = standalone server

   obey pam restrictions = yes

# This boolean parameter controls whether Samba attempts to sync the Unix
# password with the SMB password when the encrypted SMB password in the
# passdb is changed.
   unix password sync = yes

# For Unix password sync to work on a Debian GNU/Linux system, the following
# parameters must be set (thanks to Ian Kahan <<[email protected]> for
# sending the correct chat script for the passwd program in Debian Sarge).
   passwd program = /usr/bin/passwd %u
   passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .

# This boolean controls whether PAM will be used for password changes
# when requested by an SMB client instead of the program listed in
# 'passwd program'. The default is 'no'.
   pam password change = yes

# This option controls how unsuccessful authentication attempts are mapped
# to anonymous connections
   map to guest = bad user

########## Domains ###########

#
# The following settings only takes effect if 'server role = primary
# classic domain controller', 'server role = backup domain controller'
# or 'domain logons' is set 
#

# It specifies the location of the user's
# profile directory from the client point of view) The following
# required a [profiles] share to be setup on the samba server (see
# below)
;   logon path = \\%N\profiles\%U
# Another common choice is storing the profile in the user's home directory
# (this is Samba's default)
#   logon path = \\%N\%U\profile

# The following setting only takes effect if 'domain logons' is set
# It specifies the location of a user's home directory (from the client
# point of view)
;   logon drive = H:
#   logon home = \\%N\%U

# The following setting only takes effect if 'domain logons' is set
# It specifies the script to run during logon. The script must be stored
# in the [netlogon] share
# NOTE: Must be store in 'DOS' file format convention
;   logon script = logon.cmd

# This allows Unix users to be created on the domain controller via the SAMR
# RPC pipe.  The example command creates a user account with a disabled Unix
# password; please adapt to your needs
; add user script = /usr/sbin/adduser --quiet --disabled-password --gecos "" %u

# This allows machine accounts to be created on the domain controller via the 
# SAMR RPC pipe.  
# The following assumes a "machines" group exists on the system
; add machine script  = /usr/sbin/useradd -g machines -c "%u machine account" -d /var/lib/samba -s /bin/false %u

# This allows Unix groups to be created on the domain controller via the SAMR
# RPC pipe.  
; add group script = /usr/sbin/addgroup --force-badname %g

############ Misc ############

# Using the following line enables you to customise your configuration
# on a per machine basis. The %m gets replaced with the netbios name
# of the machine that is connecting
;   include = /home/samba/etc/smb.conf.%m

# Some defaults for winbind (make sure you're not using the ranges
# for something else.)
;   idmap config * :              backend = tdb
;   idmap config * :              range   = 3000-7999
;   idmap config YOURDOMAINHERE : backend = tdb
;   idmap config YOURDOMAINHERE : range   = 100000-999999
;   template shell = /bin/bash

# Setup usershare options to enable non-root users to share folders
# with the net usershare command.

# Maximum number of usershare. 0 means that usershare is disabled.
#   usershare max shares = 100

# Allow users who've been granted usershare privileges to create
# public shares, not just authenticated ones
   usershare allow guests = yes

#======================= Share Definitions =======================

# Un-comment the following (and tweak the other settings below to suit)
# to enable the default home directory shares. This will share each
# user's home directory as \\server\username
;[homes]
;   comment = Home Directories
;   browseable = no

# By default, the home directories are exported read-only. Change the
# next parameter to 'no' if you want to be able to write to them.
;   read only = yes

# File creation mask is set to 0700 for security reasons. If you want to
# create files with group=rw permissions, set next parameter to 0775.
;   create mask = 0700

# Directory creation mask is set to 0700 for security reasons. If you want to
# create dirs. with group=rw permissions, set next parameter to 0775.
;   directory mask = 0700

# By default, \\server\username shares can be connected to by anyone
# with access to the samba server.
# Un-comment the following parameter to make sure that only "username"
# can connect to \\server\username
# This might need tweaking when using external authentication schemes
;   valid users = %S

# Un-comment the following and create the netlogon directory for Domain Logons
# (you need to configure Samba to act as a domain controller too.)
;[netlogon]
;   comment = Network Logon Service
;   path = /home/samba/netlogon
;   guest ok = yes
;   read only = yes

# Un-comment the following and create the profiles directory to store
# users profiles (see the "logon path" option above)
# (you need to configure Samba to act as a domain controller too.)
# The path below should be writable by all users so that their
# profile directory may be created the first time they log on
;[profiles]
;   comment = Users profiles
;   path = /home/samba/profiles
;   guest ok = no
;   browseable = no
;   create mask = 0600
;   directory mask = 0700

[printers]
   comment = All Printers
   browseable = no
   path = /var/spool/samba
   printable = yes
   guest ok = no
   read only = yes
   create mask = 0700

# Windows clients look for this share name as a source of downloadable
# printer drivers
[print$]
   comment = Printer Drivers
   path = /var/lib/samba/printers
   browseable = yes
   read only = yes
   guest ok = no
# Uncomment to allow remote administration of Windows print drivers.
# You may need to replace 'lpadmin' with the name of the group your
# admin users are members of.
# Please note that you also need to set appropriate Unix permissions
# to the drivers directory for these users to have write rights in it
;   write list = root, @lpadmin

When I run testparm I see

Load smb config files from /etc/samba/smb.conf
Loaded services file OK.
Server role: ROLE_STANDALONE

Press enter to see a dump of your service definitions

# Global parameters
[global]
    log file = /var/log/samba/log.%m
    logging = file
    map to guest = Bad User
    max log size = 1000
    obey pam restrictions = Yes
    pam password change = Yes
    panic action = /usr/share/samba/panic-action %d
    passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
    passwd program = /usr/bin/passwd %u
    server role = standalone server
    server string = %h server (Samba, Ubuntu)
    unix password sync = Yes
    usershare allow guests = Yes
    idmap config * : backend = tdb


[printers]
    browseable = No
    comment = All Printers
    create mask = 0700
    path = /var/spool/samba
    printable = Yes


[print$]
    comment = Printer Drivers
    path = /var/lib/samba/printers

Swappiness is set to 60.

I have GNOME-sushi installed on Ubuntu 20.04 LTS. Initially when I selected a video and pressed spacebar, the following error occurred.

After installing the gstreamer1.0-plugins-bad and gstreamer1.0-plugins-ugly packages, only the audio is played but not the video.

The following are already installed (used dpkg -l | grep gstreamer)

ii  gir1.2-gstreamer-1.0:amd64                 1.16.2-2                              amd64        GObject introspection data for the GStreamer library
ii  gstreamer1.0-alsa:amd64                    1.16.2-4                              amd64        GStreamer plugin for ALSA
ii  gstreamer1.0-clutter-3.0:amd64             3.0.27-1                              amd64        Clutter PLugin for GStreamer 1.0
ii  gstreamer1.0-gl:amd64                      1.16.2-4                              amd64        GStreamer plugins for GL
ii  gstreamer1.0-gtk3:amd64                    1.16.2-1ubuntu2                       amd64        GStreamer plugin for GTK+3
ii  gstreamer1.0-packagekit                    1.1.13-2ubuntu1                       amd64        GStreamer plugin to install codecs using PackageKit
ii  gstreamer1.0-plugins-bad:amd64             1.16.2-2.1ubuntu1                     amd64        GStreamer plugins from the "bad" set
ii  gstreamer1.0-plugins-base:amd64            1.16.2-4                              amd64        GStreamer plugins from the "base" set
ii  gstreamer1.0-plugins-base-apps             1.16.2-4                              amd64        GStreamer helper programs from the "base" set
ii  gstreamer1.0-plugins-good:amd64            1.16.2-1ubuntu2                       amd64        GStreamer plugins from the "good" set
ii  gstreamer1.0-plugins-ugly:amd64            1.16.2-2build1                        amd64        GStreamer plugins from the "ugly" set
ii  gstreamer1.0-pulseaudio:amd64              1.16.2-1ubuntu2                       amd64        GStreamer plugin for PulseAudio
ii  gstreamer1.0-tools                         1.16.2-2                              amd64        Tools for use with GStreamer
ii  gstreamer1.0-x:amd64                       1.16.2-4                              amd64        GStreamer plugins for X11 and Pango
ii  libgstreamer-gl1.0-0:amd64                 1.16.2-4                              amd64        GStreamer GL libraries
ii  libgstreamer-plugins-bad1.0-0:amd64        1.16.2-2.1ubuntu1                     amd64        GStreamer libraries from the "bad" set
ii  libgstreamer-plugins-base1.0-0:amd64       1.16.2-4                              amd64        GStreamer libraries from the "base" set
ii  libgstreamer-plugins-good1.0-0:amd64       1.16.2-1ubuntu2                       amd64        GStreamer development files for libraries from the "good" set
ii  libgstreamer1.0-0:amd64                    1.16.2-2                              amd64        Core GStreamer libraries and elements

How to install the missing plugins?

I have Ubuntu 20.04 LTS installed on my primary computer and Windows 10 1909 installed on secondary computer. I usually build websites. If I want to view a simple HTML file, I just open it on the browser. But what if I want to view those on my secondary PC.

What should I do to open those HTML files on my secondary computer on a browser?

I recently installed chrome dev version, even when I had chrome (stable) already installed.

After checking for updates with sudo apt update I get the following errors (maybe they are warnings).

How do I deal with them? And what is the cause.

Extra Info: I installed dev by downloading the .deb package, and the executing sudo apt install /home/abhay/Downloads/google-chrome-unstable_current_amd64.deb.

Also I can see two chrome PPAs in Software & Updates.

Is that somehow related to this incident? Is that a problem, having two same PPAs.

I am trying to install a tool called Stacer, to clean junk files from my PC (Ubuntu 20.04 LTS).

The app is installed but everytime is use sudo apt-get update && sudo apt-get upgrade, I get the following error

Ign:11 http://ppa.launchpad.net/oguzhaninan/stacer/ubuntu focal InRelease
Err:12 http://ppa.launchpad.net/oguzhaninan/stacer/ubuntu focal Release 404 Not Found [IP: 2001:67c:1560:8008::15 80] Reading package lists... Done E: The repository 'http://ppa.launchpad.net/oguzhaninan/stacer/ubuntu focal Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details.

What should I do?

EDIT 1 The question is not answered at What can I do if a repository/PPA does not have a Release file?.

They suggest to remove the PPA. But the error message says it is disabled by default. So there might be a way to enable it.

How do I check the battery for my bluetooth speaker. I tried solutions from https://stackoverflow.com/questions/49078659/check-battery-level-of-connected-bluetooth-device-on-linux. But none of them work in 2020.

I also tried https://github.com/TheWeirdDev/Bluetooth_Headset_Battery_Level. But it wont work. I get an error F4:4E:FD:34:7D:59 is offline [Errno 111] Connection refused.

Can someone help me?

There is a package called firefox-locale-en on my system (Ubuntu 20.04 lts), even though I have uninstalled Firefox on the very first day. Is it safe to purge it with sudo apt purge firefox-locale-en?

EDIT 1

If yes, what does it do?

EDIT 2

Even though it might sound like a silly doubt, but I would always like to have a knowledgeable person's opinion, because I remember last time python3.6 was not used by me specifically and I decided to purge it. Only to find out my PC doesn't work at all any more. And Hence I got to 20.04 from 18.04. Same way I thought firefox might be associated with some internet related service on Ubuntu.

Older versions of Ubuntu shipped with python 2.7 and python 3.6. But in Ubuntu 20.04 LTS, only python 3.8 is installed. So when python was typed in terminal, python3.8 opened. python, python3 and python3.8 did the same work of opening python3.8.

But later on when I installed python2.7, it messed the python command. When I used python command, python2.7 started opening. To use python3.8 now I needed python3 or python3.8.

Can someone explain why did python command changed its target application?

Ubuntu (older than 20.04 LTS) ships with Python 3 and python 2 both. When python was typed in terminal, python2.7 opens and to open python 3.6, python3 command is needed. However python3.6 also works.

So my doubt is why python3 and python3.6 both work? Technically since I have python3.6 installed, only python3.6 should work. But then why python3 works as well?

EDIT 1

When I type python and press tabs twice (which shows possible commands), I see python3 and python3.8 both.

My doubt is what is the difference between the python3 command and python3.6 command in their execution.

I recently installed a GRUB theme from gnome-look.org on Ubuntu 20.04 LTS (my PC is Windows 10 dual-boot with Ubuntu). To install the theme successfully, the file at /etc/default/grub needs to be edited.

So I used sudo gedit /etc/default/grub command to do so. After editing when I save it I, see the following warning in Terminal:

(gedit:7169): Tepl-WARNING **: 21:13:18.135: GVfs metadata is not supported. Fallback to TeplMetadataManager. Either GVfs is not correctly installed or GVfs metadata are not supported on this platform. In the latter case, you should configure Tepl with --disable-gvfs-metadata.

Later on I also edited the grub menu by editing the file at /boot/grub/grub.cfg by using sudo gedit /boot/grub/grub.cfg.

Upon saving the file I got a similar warning

(gedit:8887): Tepl-WARNING **: 21:18:46.163: GVfs metadata is not supported. Fallback to TeplMetadataManager. Either GVfs is not correctly installed or GVfs metadata are not supported on this platform. In the latter case, you should configure Tepl with --disable-gvfs-metadata.

Can someone tell me the reason? And also how to deal with it?