Ubuntu Server snippets

compact

# Extract tar
tar -xvzf community_images.tar.gz

#create tar
tar -cvzf filename.tar.gz file.js

#example with exclude
tar -czvf out/app.tar.gz --exclude=./out --exclude=./node_modules .

sudo apt-get install unzip
unzip file.zip -d destination_folder

# See contents of tar without extract
tar -tf backup.tar.gz

docker

# List docker images
sudo docker images

#list docker containers
sudo docker ps

#open bash inside a container
sudo docker exec -it yourContainer bash



Accessing the Database
You can't access the MongoDB from the outside the server. To access the MongoDB shell you need to log into your server via SSH first and then run the following command:

docker exec -it mongodb mongo <appName>
Later on we'll be using a separate MongoDB instance for every app.


#Build a Docker image using the Dockerfile:
docker build -t msanand/node .


#run
 docker run -d --link mongodb --name your_container --restart=always  your/imagename

#turn localhost from host available to cantainer
--net=host"

#create image from container
docker commit -p 07fde139a208 rss



docker images
Save image with id:
sudo docker save -o /home/matrix/matrix-data.tar matrix-data
sudo docker load -i <path to copied image file>


#restart docker daemon
sudo /etc/init.d/docker restart

Docker commands

docker run -d --name web nginx:alpine
Then update the restart-policy;

docker update --restart=always web

docker run -d --name [container] --restart=always -p 8081:8080 [imagename]

nginx

# sudo apt-get install apache2-utils
#sudo htpasswd -c /etc/nginx/.htpasswd nginx


sudo apt-get install nginx
sudo nano /etc/nginx/nginx.conf 
sudo nginx -s reload


http{
  server {
              listen 80;
              server_name 127.0.0.2;
  
              location / {
                  proxy_pass http://127.0.0.1:4000;
  
                  proxy_http_version 1.1;
  
                  proxy_set_header X-Real-IP $remote_addr;
                  proxy_set_header Host $host;
                  proxy_set_header Upgrade $http_upgrade;
                  # proxy_set_header Connection $connection_upgrade;
                  #auth_basic "Private Property";
                  #auth_basic_user_file /etc/nginx/.htpasswd;
              }
          }
          server {
            listen 80;
            server_name 127.0.0.10;
            root /home/adrianolsk/Documents/;
        }

  }

ssh

sudo service ssh reload
sudo service ssh restart

#Create a ssh tunnel on localhost:8080 to server:8080 and server:5000 to localhost:3000
ssh root@SERVER_IP -L 8080:127.0.0.1:8080 -R 5000:127.0.0.1:3000



#kill ssh lost connections
type "who" to see active connections ips
Type pgrep -c sshd which should print a number. It that number is zero, no-one is connected right now. If not, proceed:
Type pkill --signal HUP sshd

wkhtmltopdf

sudo apt-get install wkhtmltopdf