Useful Linux Softwares


systemd systemctl

In /etc/systemd/system folder, edit .service file,


### Script
[Unit]
Description=Spark service

[Service]
ExecStart=/path/to/spark/sbin/start-all.sh

[Install]
WantedBy=multi-user.target
### Command
sudo systemctl daemon-reload
sudo systemctl start myfirst.service
sudo systemctl enable myfirst.service # enable to run at boot
sudo systemctl stop myfirst.service

### Other command for checking
systemctl list-units --type=service
systemctl list-unit-files
    

nginx

In /etc/nginx/sites-enabled/, edit your file with url,


# You should look at the following URL's in order to grasp a solid understanding
# of Nginx configuration files in order to fully unleash the power of Nginx.
# https://www.nginx.com/resources/wiki/start/
# https://www.nginx.com/resources/wiki/start/topics/tutorials/config_pitfalls/
# https://wiki.debian.org/Nginx/DirectoryStructure
#
# In most cases, administrators will remove this file from sites-enabled/ and
# leave it as reference inside of sites-available where it will continue to be
# updated by the nginx packaging team.
#
# This file will automatically load configuration files provided by other
# applications, such as Drupal or Wordpress. These applications will be made
# available underneath a path with that package name, such as /drupal8.
#
# Please see /usr/share/doc/nginx-doc/examples/ for more detailed examples.
##

# Default server configuration
#
server {
        listen 80 default_server;
        listen [::]:80 default_server;

        # SSL configuration
        #
        # listen 443 ssl default_server;
        # listen [::]:443 ssl default_server;
        #
        # Note: You should disable gzip for SSL traffic.
        # See: https://bugs.debian.org/773332
        #
        # Read up on ssl_ciphers to ensure a secure configuration.
        # See: https://bugs.debian.org/765782
        #
        # Self signed certs generated by the ssl-cert package
        # Don't use them in a production server!
        #
        # include snippets/snakeoil.conf;

        root /var/www/html;
        # Add index.php to the list if you are using PHP
        index index.html index.htm index.nginx-debian.html;

        server_name abc.leo.ai;

        location / {
                # First attempt to serve request as file, then
                # as directory, then fall back to displaying a 404.
                try_files $uri $uri/ =404;
                proxy_pass http://ip3:7000;
                proxy_set_header X-Forwarded-Proto http;
        }

        # Law Extractor
        location /lawex-api/ {
                proxy_pass http://ip3:7001/;
                proxy_set_header X-Forwarded-Proto http;
        }

        # location /


        # pass PHP scripts to FastCGI server
        #
        #location ~ \.php$ {
        #       include snippets/fastcgi-php.conf;
        #
        #       # With php-fpm (or other unix sockets):
        #       fastcgi_pass unix:/var/run/php/php7.0-fpm.sock;
        #       # With php-cgi (or other tcp sockets):
        #       fastcgi_pass 127.0.0.1:9000;
        #}

        # deny access to .htaccess files, if Apache's document root
        # concurs with nginx's one
        #
        #location ~ /\.ht {
        #       deny all;
        #}
}
# Virtual Host configuration for example.com
#
# You can move that to a different file under sites-available/ and symlink that
# to sites-enabled/ to enable it.
#
#server {
#       listen 80;
#       listen [::]:80;
#
#       server_name example.com;
#
#       root /var/www/example.com;
#       index index.html;
#
#       location / {
#               try_files $uri $uri/ =404;
#       }
#}
    

sudo nginx -s reload

ssh autossh


### Set up ssh tunneling
ssh -i AWS_Linux.pem -R 7000:192.168.4.72:7000 ubuntu@3.9.89.111
### Autossh with systemd
[Unit]
Description=AutoSSH Tunnel to provide access to website from the Internet.
After=network.target

[Service]
User=user
Group=group
Environment="AUTOSSH_GATETIME=0"
ExecStart=/usr/bin/autossh -N -M 0 -o "ServerAliveInterval 30" -o "ServerAliveCountMax 3" -R 7000:192.168.4.72:7000 -i /home/re5q/AWS_Linux.pem ubuntu@3.9.89.111
ExecStop=/usr/bin/pkill -9 autossh

[Install]
WantedBy=multi-user.target
    

References


  1. Install PowerDNS on Ubuntu 18.04 / Debian 9
  2. How to Install pfSense Firewall on Ubuntu and CentOS?
  3. Fun and Profit with Reverse SSH Tunnels and AutoSSH