vmtoolsd:867 error cpu stuck

July 25, 2024 in Ubuntu

vmtoolsd:867 error cpu stuck

$ sudo update-grub

July 25, 2024 in Ubuntu

overlayfs missing ‘lowerdir’

sudo ubuntu-drivers autoinstall
snap remove docker

July 25, 2024 in Ubuntu

remove swap files in ubuntu

sudo swapoff -a -v
sudo rm /swapfile
#back up /etc/fstab:
sudo cp /etc/fstab /etc/fstab.bak
sudo sed -i '/\/swapfile/d' /etc/fstab

July 18, 2024 in Ubuntu

Negative Prompts for stable-diffusion

poorly Rendered face
poorly drawn face
poor facial details
poorly drawn hands
poorly rendered hands
low resolution
Images cut out at the top, left, right, bottom.
bad composition
mutated body parts
blurry image
disfigured
oversaturated
bad anatomy
deformed body features

out of frame, lowres, text, error, cropped, worst quality, low quality, jpeg artifacts, ugly, duplicate, morbid, mutilated, out of frame, extra fingers, mutated hands, poorly drawn hands, poorly drawn face, mutation, deformed, blurry, dehydrated, bad anatomy, bad proportions, extra limbs, cloned face, disfigured, gross proportions, malformed limbs, missing arms, missing legs, extra arms, extra legs, fused fingers, too many fingers, long neck, username, watermark, signature,

July 16, 2024 in Ubuntu

ssh enable in ubuntu VM machine

sudo apt update
sudo apt upgrade
sudo apt install openssh-server 
sudo systemctl enable --now ssh
sudo systemctl status ssh           /              sudo systemctl disable ssh

sudo ufw status
sudo ufw allow ssh

ssh username@IP_address

July 13, 2024 in Ubuntu

Using Free Let’s Encrypt SSL/TLS Certificates with NGINX

1. Download the Let’s Encrypt Client

First, download the Let’s Encrypt client, certbot.

As mentioned just above, we tested the instructions on Ubuntu 16.04, and these are the appropriate commands on that platform:

$ apt-get update
$ sudo apt-get install certbot
$ apt-get install python-certbot-nginx

With Ubuntu 18.04 and later, substitute the Python 3 version:

$ apt-get update
$ sudo apt-get install certbot
$ apt-get install python3-certbot-nginx

2. Set Up NGINX

certbot can automatically configure NGINX for SSL/TLS. It looks for and modifies the server block in your NGINX configuration that contains a server_name directive with the domain name you’re requesting a certificate for. In our example, the domain is www.example.com.

1. Assuming you’re starting with a fresh NGINX install, use a text editor to create a file in the /etc/nginx/conf.d directory named domain‑name.conf (so in our example, www.example.com.conf).
2. Specify your domain name (and variants, if any) with the server_name directive:server { listen 80 default_server; listen [::]:80 default_server; root /var/www/html; server_name example.com www.example.com; }
3. Save the file, then run this command to verify the syntax of your configuration and restart NGINX:$ nginx -t && nginx -s reload

3. Obtain the SSL/TLS Certificate

The NGINX plug‑in for certbot takes care of reconfiguring NGINX and reloading its configuration whenever necessary.

1. Run the following command to generate certificates with the NGINX plug‑in:$ sudo certbot --nginx -d example.com -d www.example.com
2. Respond to prompts from certbot to configure your HTTPS settings, which involves entering your email address and agreeing to the Let’s Encrypt terms of service.

If you look at domain‑name.conf, you see that certbot has modified it:

server {    listen 80 default_server;
    listen [::]:80 default_server;
    root /var/www/html;
    server_name  example.com www.example.com;

    listen 443 ssl; # managed by Certbot

    # RSA certificate
    ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem; # managed by Certbot

    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot

    # Redirect non-https traffic to https
    if ($scheme != "https") {
        return 301 https://$host$request_uri;
    } # managed by Certbot
}

4. Automatically Renew Let’s Encrypt Certificates

Let’s Encrypt certificates expire after 90 days. We encourage you to renew your certificates automatically. Here we add a cron job to an existing crontab file to do this.

1. Open the crontab file.$ crontab -e
2. Add the certbot command to run daily. In this example, we run the command every day at noon. The command checks to see if the certificate on the server will expire within the next 30 days, and renews it if so. The --quiet directive tells certbot not to generate output.0 12 * * * /usr/bin/certbot renew --quiet
3. Save and close the file. All installed certificates will be automatically renewed and reloaded.

July 2, 2024 in Ubuntu

system last reboot time command ubuntu

who -b command : Shows the time of last Linux system boot time.
last -x|grep shutdown | head -1 : Use the last reboot and this command to display all the previous reboot date and time for the system.12 Dec 2020

March 18, 2024 in Ubuntu

Livepatch has fixed kernel vulnerabilities. System restart recommended on the closest maintenance window

To remove the repeating System restart recommended on the closest maintenance window message open the terminal and type:

sudo apt update && sudo apt upgrade
sudo reboot

January 15, 2024 in Ubuntu

How to enable all site confs with a2ensite

You need to navigate to /etc/apache2/sites-available and then run the command:

sudo a2ensite *

It will enable all sites in the directory. (the files should be somthing like xxx.conf)

And then reload apache using sudo service apache2 reload.

So your command sequence should be like so:

cd /etc/apache2/sites-available
sudo a2ensite *
sudo service apache2 reload