90
votes
Accepted
vboxdrv.sh: failed: modprobe vboxdrv failed. Please use 'dmesg' to find out why
VirtualBox + Secure Boot + Ubuntu = fail
The problem is the requirement that all kernel modules must be signed
by a key trusted by the UEFI system, otherwise loading will fail.
Ubuntu does ...
- 14.5k
61
votes
Accepted
MongoDB (3.2) doesn't start on Lubuntu 16.04 LTS as a service
The instructions/packages on the MongoDB site are currently available for LTS Ubuntu 12.04 and 14.04 only. The packages are set up to use upstart instead of systemd. You need to create a systemctl ...
- 1,664
55
votes
Accepted
Can I reuse Linux DVDs to install on other computers?
Sure. As long as your DVDs don't die physically from old age, surface scratches or other physical damage, you can use them as often as you want.
Depending on if you used a DVD-R or DVD-RW, the ...
- 104k
52
votes
Accepted
python installed in ubuntu but python command not found
As suggested in comments, you could create an alias as follows:
alias python='python3'
by adding it to the ~/.bashrc file at the end of this file, exiting and reloading it in the current terminal ...
- 7,067
49
votes
How to change keyboard layout in Lubuntu 15.10?
Some googling and a test led me to this:
Right click the panel -> Add / Remove Panel Items -> Add -> Keyboard Layout Handler
That adds an icon to the panel, and by right clicking it and selecting "...
48
votes
Accepted
Which Lubuntu website is the correct one?
The official Lubuntu home is: https://lubuntu.me
If you query whois you see that lubuntu.me is registered by Canonical:
$ whois lubuntu.me
[..]
Registrant Organization: Canonical, Ltd.
[..]
Also, ...
- 3,344
42
votes
Accepted
Sudo comes up with an error, cannot run anything as root
If you can login as root:
$ su root #enter password
$ chmod 644 /usr/lib/sudo/sudoers.so
$ chown -R root /usr/lib/sudo
If not, you'll have to startup in recovery mode, get write permission on ...
- 854
42
votes
Accepted
Can't install wine from winehq.org on Ubuntu (actually Lubuntu) 18.04 LTS
Analysis
The WineHQ repository misses the dependencies for wine-stable package.
I have reported a bug 48513 to WineHQ bugzilla.
The main problem here is bad documentation, which is written in non-...
- 95.1k
36
votes
python installed in ubuntu but python command not found
This solution only applies to Ubuntu 20.04 (but sometimes people look at "similar issues" for a solution).
In the case you like python to refer to python3, you can simply install python-is-...
- 521
33
votes
Accepted
How to change priorities of x-www-browser?
You can change the priority with:
sudo update-alternatives --install /usr/bin/x-www-browser x-www-browser google-chrome-stable <priority_as_integer>
Example:
before
$ sudo update-...
- 88.1k
31
votes
Accepted
How to fix "libpng12.so.0: cannot open shared object file: No such file or directory"?
According to https://github.com/tcoopman/image-webpack-loader/issues/95, you can use:
wget -q -O /tmp/libpng12.deb http://mirrors.kernel.org/ubuntu/pool/main/libp/libpng/libpng12-0_1.2.54-...
- 426
28
votes
Accepted
Have I Installed Lubuntu 21.04 LTS, or need I do something to have LTS?
You don't make a choice during installation.
You choose by selecting the correct release to download.
If you download 20.04, that IS an LTS release.
If you download 21.04, that's NOT an LTS release.
...
- 53.7k
27
votes
Accepted
Samba config GUI doesn't show after entering password
Should run Samba from Terminal.
$ gksu system-config-samba
If returns error message with last line similar to this:
SystemError: could not open configuration file '/etc/libuser.conf': No such ...
- 533
27
votes
Grub menu at boot time... "holding shift" not working
I also cannot access the GRUB menu by any manner of pressing shift or esc on my Asus X205TA. To get the GRUB menu to display at boot, I had to modify the /etc/default/grub file. See this page.
To get ...
- 68.6k
26
votes
Accepted
How can I remove the second desktop on Lubuntu?
Open the Application menu, go to Preferences and -> Openbox Configuration Manager:
Click Desktops:
Click the - button, and you will have 1 desktop. You may then wish to remove the "Desktop Pager" in ...
- 31.8k
26
votes
Networking is disabled and I can't re-enable it
try these commands
These commands will delete the file where network state is stored and restarts the service forcefuly.
sudo rm -f /var/lib/NetworkManager/NetworkManager.state
sudo service network-...
- 543
26
votes
Unable to install virtual box guest additions on Lubuntu 16.04
I managed to solve my problem, it is pretty easy.
What I did was I opened terminal and typed:
apt update
apt upgrade #To install Linux headers
apt install gcc
apt install make
cd /media/"username"/...
- 3,866
26
votes
Accepted
Lubuntu 18.10 How to activate tap to click
this works for me
https://wiki.archlinux.org/index.php/Libinput#Touchpad_configuration
create:
/etc/X11/xorg.conf.d/30-touchpad.conf
content:
Section "InputClass"
Identifier "...
- 276
25
votes
Accepted
VirtualBox shared folders are owned by root in Lubuntu guest
On Ubuntu Server host execute these commands :
sudo chmod -R 777 /path-to-shared-folder/shared-folder
sudo chown -R user1:user1 /path-to-shared-folder/shared-folder
On Lubuntu Desktop guest ...
- 30.6k
25
votes
couldn't be accessed by user '_apt'. - pkgAcquire::Run (13: Permission denied)
This is a known bug:
https://bugs.launchpad.net/ubuntu/+source/aptitude/+bug/1543280
They suggest running the following command:
sudo chown _apt /var/lib/update-notifier/package-data-downloads/...
- 912
24
votes
Can't type "|" (vertical pipe)
Key combination to type the pipe character in a Swedish keyboard
Press the Alt Gr key and and after that the key between z and shift to get | in a Swedish keyboard. (This key has < (default), > (...
- 44k
22
votes
vboxdrv.sh: failed: modprobe vboxdrv failed. Please use 'dmesg' to find out why
The above answer probably works fine, but if you want an easier time for it:
I was able to solve it by
booting into the BIOS and going > advanced (f7) > boot > scroll down to "secure boot" > change ...
- 333
21
votes
Accepted
gpg: problem with the agent: Permission denied
Try using the PIN entry mode of loopback:
gpg --decrypt --pinentry-mode=loopback <file>
I can replicate your issue on my Linux system when I try GPG with a terminal su:
$ gpg --decrypt ...
20
votes
Accepted
How to Remote Desktop from Windows to Lubuntu
First open a terminal and enter sudo apt-get install xrdp.
When that is installed enter sudo nano /etc/xrdp/startwm.sh in the terminal.
Make sure the last line looks like this:
. /etc/X11/Xsession
...
- 461
20
votes
Accepted
Regain control after opening firefox via terminal
The obvious way to go is to launch such applications in background by adding an & sign to the end of the command, like this:
firefox &
Please note that Firefox is now a child process of your ...
- 104k
20
votes
Accepted
How to install a Specific Version of Node on Ubuntu Server
Install nodejs 6
Get your nodejs tarball from node site e.g. node-v6.11.3-linux-x64.tar.gz from v6.11.3
wget https://nodejs.org/dist/v6.11.3/node-v6.11.3-linux-x64.tar.gz
Unpack provided archive ...
- 4,893
19
votes
"Shockwave Flash is known to be vulnerable" warning
The accepted way to get Flash in Ubuntu and Linux, and a recent version, is with Google Chrome, as it's the only browser shipping a Flash version.
Adobe stopped supporting Flash for Linux (even in ...
- 71k
19
votes
Lubuntu 18.10 How to activate tap to click
Activating tap-to-click with xinput via command line
Find your device id (in my case 13 bellow ):
# xinput list
Look for:
↳ ETPS/2 Elantech Touchpad id=13 [slave pointer (2)]
Find the "...
- 191
18
votes
VirtualBox shared folders are owned by root in Lubuntu guest
No need to change main group of user - add user into group is sufficient.
sudo adduser $USER vboxsf
After the command do a restart or logout and login.
- 324
Only top scored, non community-wiki answers of a minimum length are eligible