Tag: ubuntu

How to upgrade kernel to latest version on Ubuntu 20.04 Focal Fossa Linux

(source: https://linuxconfig.org/how-to-upgrade-kernel-to-latest-version-on-ubuntu-20-04-focal-fossa-linux)

In this tutorial you will learn:

How to install kernel upgrade script utility
How to to upgrade kernel to latest version
How to uninstall previously installed PPA kernels

Upgrade kernel to latest version on Ubuntu 20.04 Focal Fossa Linux

Software Requirements and Conventions Used

Category	Requirements, Conventions or Software Version Used
System	Installed Ubuntu 20.04 or upgraded Ubuntu 20.04 Focal Fossa
Software	ubuntu-mainline-kernel.sh
Other	Privileged access to your Linux system as root or via the `sudo` command.
Conventions	# – requires given linux commands to be executed with root privileges either directly as a root user or by use of `sudo` command $ – requires given linux commands to be executed as a regular non-privileged user

Upgrade kernel to latest version on Ubuntu 20.04 step by step instructions

First step is to download the ubuntu-mainline-kernel.sh Bash script utility. Open up your terminal and enter:
$ wget https://raw.githubusercontent.com/pimlie/ubuntu-mainline-kernel.sh/master/ubuntu-mainline-kernel.sh
Next, step is to install the previously downloaded script into our executable path:
$ sudo install ubuntu-mainline-kernel.sh /usr/local/bin/
All is ready to upgrade the Ubuntu kernel to the latest version. To do so run do following command:
$ ubuntu-mainline-kernel.sh -i

Finding latest version available on kernel.ubuntu.com Latest version is: v5.4.3, continue? (y/N) The above command will search for the latest kernel version available. To continue with the kernel installation answer y.
Reboot your Ubuntu system and check for the loaded Kernel version:
$ uname -rs Latest Kernel version upgrade
To uninstall the PPA kernel version execute the following command and follow to wizard:
$ ubuntu-mainline-kernel.sh -u

August 22, 2020

Installation of Autodesk Eagle 9.0.1 in Ubuntu

(more…)

May 18, 2018

Chrome browser in Ubuntu

Follow the instruction for installation:

Add Key:

wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add -

Set repository:

sudo sh -c 'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google-chrome.list'

Install package:

sudo apt-get update 
sudo apt-get install google-chrome-stable

August 27, 2017

Change linux hostname
How to change the hostname of the system
```
sudo hostname (new hostname)
```
Change old hostname also in the following file:
```
sudo nano /etc/hosts
```
August 19, 2017
OpenSSH server install Ubuntu
1. To install it, open terminal (Ctrl+Alt+T) or log in Ubuntu server and run command:
sudo apt-get install openssh-server
2. After that, you should have SSH service enabled in your system, you may check its status by running command:
sudo service ssh status
3. You may change some settings (e.g., the listening port, and root login permission) by editing the configuration file via command:
sudo nano /etc/ssh/sshd_config
On Ubuntu desktop, you may use gedit instead of nano:

Finally apply the changes by restarting or reloading SSH:
sudo service ssh restart
May 17, 2017
Running Ubuntu full-screen in Virtualbox
Install Ubuntu in Virtualbox. It’s not directly possible to run Native full-screen resolution.

Follow the next steps to solve this problem:
- Select from ‘Devices’ in the titlebar the option ‘Guest additions’.
- Reboot the virtual machine.
- Press the host-key (by default right-CTRL) and F simultainously.
The screen turns full-screen Ubuntu in native resolution.
March 21, 2017
OpenVPN Client installation in Ubuntu
Open the terminal.
Update the software repositories and install the network manager.
```
$ sudo apt-get update
$ sudo apt-get install network-manager-openvpn
```
Copy your VPN files (*.ovpn and certificate files) to a known location on your computer.

Open network connections.
Edit connections
Load configuration
Select your *.ovpn file.
March 21, 2017
Keepass for Ubuntu
Add the repository to the software centre. The standard version in software centre is old.
```
ppa:jtaylor/keepass
```
Search for ‘KeepassX’ and install.
Auto fill-in
By default, you can’t fill in the user credantials automatically. To make this possible, you have to install another program called ‘xdotool’.
```
$ sudo apt-get install xdotool
```
March 21, 2017
Ubuntu 14.04 default brightness
Laptop users still have the backlight issue in Ubuntu 14.04. Every time Ubuntu boots up you get the maximum level of screen brightness.

Here’s a workaround by adding a startup script which will automatically adjust screen brightness when Ubuntu boots up.

To get started:

Preparation: Open your file browser and navigate to “Computer→ sys → class → backlight” directory. You’ll see two or three folders there.

In each folder there’s a file called actual_brightness, you can see its content (brightness value) through the thumbnail icon.

actual-brightness

Remember them and do:
1. Change your screen brightness through Fn + Arrow key.
2. Check out the actual_brightness files in each folder (Re-open each folder to refresh the value).
3. Does the value change?
4. Remember the folder name in which the value of actual_brightness changes.
5. Replace acpi_video0 in below commands with that folder name
1. Press Ctrl+Alt+T on keyboard to open the terminal. When it opens, run the command below will give you the maximum level of your laptop backlight:
```
$ cat /sys/class/backlight/acpi_video0/max_brightness
```
Mine is 9, so I can set backlight level from 0 to 9.

2. Run the command below one by one. You’ll get the super user privilege and open the /etc/rc.local file, a script executed at the end of each multiuser runlevel, with gedit editor.
```
$ sudo -i
```
```
$ gedit /etc/rc.local
```
Add the line below before the last. Change the number 0 to the brightness level you want.
```
$ echo 0 > /sys/class/backlight/acpi_video0/brightness
```
That’s it. Enjoy!

(source: http://ubuntuhandbook.org/index.php/2014/04/save-screen-brightness-settings-in-ubuntu-14-04/)
March 21, 2017
ClamAV installation
ClamAV is by default installed in Ubuntu. You want to be sure that you have the latest version and update.

Clamav will sometimes have trouble downloading updates for some reason or another. I’ll show you how to fix this in Ubuntu Linux! First, stop clamav and freshclam:
```
$ sudo /etc/init.d/clamav-daemon stop
$ sudo /etc/init.d/clamav-freshclam stop
```
Next we are going to manually download the latest signatures from clamav’s website and place them into the proper location in Ubuntu. In Ubuntu Linux, clamav signatures are located in /var/lib/clamav/.
```
$ wget http://database.clamav.net/main.cvd && sudo cp main.cvd /var/lib/clamav/
$ wget http://database.clamav.net/daily.cvd && sudo cp daily.cvd /var/lib/clamav/
$ wget http://database.clamav.net/bytecode.cvd && sudo cp bytecode.cvd /var/lib/clamav/
```
Next, fix some permissions:
```
$ sudo chown -R clamav:clamav /var/lib/clamav/
```
Finally, start clamav:
```
$ sudo /etc/init.d/clamav-daemon start
$ sudo /etc/init.d/clamav-freshclam start
```
Lastly you may want to check the clamav logs to make sure clamav is updating OK.
```
$ cat /var/log/clamav/freshclam.log
```
Bron: https://scottlinux.com/2012/09/04/clamav-signatures-not-updating-ubuntu-linux/
ClamTK GUI install

Many people prefer graphical user interfaces. That’s why we install a GUI.
Go to the following website, and look for the latest version of the *.deb file:
https://bitbucket.org/dave_theunsub/clamtk/downloads

Open the file in Software Centre. Click install.
March 21, 2017

Tag: ubuntu

Software Requirements and Conventions Used

Upgrade kernel to latest version on Ubuntu 20.04 step by step instructions

Auto fill-in

ClamTK GUI install