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System Administration

A collection of 14 posts

How to setup Basic Auth password authentication for NGINX

How to setup Basic Auth password authentication for NGINX

Create a *.htpasswd file. Eg: touch /etc/nginx/conf.d/nginx.htpasswd Add an user to the file: echo -n 'user1' >> ./nginx/nginx.htpasswd Generate a password to the user using openssl ultility: openssl passwd -apr1 >> ./nginx/nginx.htpasswd The above command will prompt

Setup SSH security on a Linux machine

System Administration

Setup SSH security on a Linux machine

Enable key-based authentication First, enable key-based authentication. It is much more secure than using passwords. Find out how to do so here: Enabling SSH key-based authentication on a Linux machineIt is recommended to use key-based authentication over passwords. Generating a key pair on your local machine We need a public-private

Enabling SSH key-based authentication on a Linux machine

Enabling SSH key-based authentication on a Linux machine

It is recommended to use key-based authentication over passwords. Generating a key pair on your local machine We need a public-private key pair to authenticate with the server. If you have one already, skip this step. If not, enter the following command to generate a key pair. ssh-keygen -t ed25519

System Administration

How to disable sleep when lid closed to turn a Macbook into a server

Disable sleep when lid closed sudo pmset -a disablesleep 1 Incase you want to revert, run this command sudo pmset -a disablesleep 0 Display power settings pmset -g

How to multitask in Linux with Screen

System Administration

How to multitask in Linux with Screen

Screen allows you to have multiple shell sessions, switch between them, as well as terminate the SSH session on a remote machine while keeping long-running tasks running, and return to the session later. Start new screen session screen screen -S session_name Detach from screen ^a + d List screens screen

How to auto-mount hard drives in Ubuntu

How to auto-mount hard drives in Ubuntu

List partitions and note the name and UUID of the partition you want to mount sudo lsblk -o NAME,FSTYPE,UUID Sample output: NAME FSTYPE UUID sda ├─sda1 vfat 7158-C80D ├─sda2 ext4 639f097b-6b4e-4c93-b91e-29e219e5ddce └─sda3 LVM2_member mslNSe-6uVU-aw3U-Ea0a-joV6-LWuk-rBMmiP └─ubuntu--vg-ubuntu--lv ext4 3abbffb9-14b2-4fbf-8dde-3e42229703a0 sdb ├─sdb1 vfat 67E3-17E

How to zip & unzip in Linux

How to zip & unzip in Linux

Install zip and unzip sudo apt-get install zip unzip Zip a folder zip -r file_name.zip /path/to/folder Unzip at current working directory unzip file_name.zip Unzip at specified folder unzip file_name.zip -d /path/to/folder

Testing NGINX config

Testing NGINX config

To test Nginx config: nginx -t To test a specific config file: nginx -t -c /etc/nginx/sites-enabled/example.com

How to create persistent PostgreSQL database with docker-compose

How to create persistent PostgreSQL database with docker-compose

To spin up Postgres on Docker, create docker-compose.yml like so: version: '3.3' services: db: image: postgres:14-alpine # alpine images are lighweight restart: always container_name: db ports: - 5432:5432 # expose default Postgres port for connections environment: # initialize database connection parameters with environment variables. # more info:

Installing Plex server on headless Raspberry Pi

System Administration

Installing Plex server on headless Raspberry Pi

# update and upgrade sudo apt-get update sudo apt-get upgrade # add plex repo sudo apt-get install apt-transport-https curl <https://downloads.plex.tv/plex-keys/PlexSign.key> | sudo apt-key add - echo deb <https://downloads.plex.tv/repo/deb> public main | sudo tee /etc/apt/sources.list.d/plexmediaserver.

How to wget download multiple links in the background

How to wget download multiple links in the background

First, create a text file (eg links.txt) containing all links you want to download. For example https://dumps.wikimedia.org/enwiki/20210820/enwiki-20210820-geo_tags.sql.gz https://dumps.wikimedia.org/enwiki/20210820/enwiki-20210820-page_props.sql.gz https://dumps.wikimedia.org/enwiki/20210820/enwiki-20210820-page.sql.gz https://dumps.wikimedia.org/

How to setup a OpenVPN server

How to setup a OpenVPN server

Download install script wget <https://git.io/vpn> -O openvpn-install.shwget <https://git.io/vpn> -O openvpn-install.sh Execute the script sudo chmod +x openvpn-install.sh sudo bash openvpn-install.sh At this point you will be prompted to choose either UDP or TCP in protocol options,

How to check which ports are used by which processes in Linux

How to check which ports are used by which processes in Linux

Install net-tools sudo apt-get install net-tools Run this command netstat -tulpn | grep LISTEN A list of process IDs will be shown with the ports they listen to.

How to setup a Samba server in Linux and share SMB shares

How to setup a Samba server in Linux and share SMB shares

Note that this guide will create a public share with no authentications. First, install the necessary packages sudo apt-get update && \ apt-get upgrade -y && \ apt-get install ntfs-3g exfat-utils exfat-fuse samba samba-common -y Create a folder to share and implement permissions mkdir /mnt/shared sudo chmod 777 /mnt/