Usefull CMDs

Linux

Linux

Disk / Space CMD

Disk / Space CMD

Will give the usage of the user you are logged in as

sudo du -h --max-depth=1

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TheΒ df command primarily checks disk usage on a mounted filesystem. If you don't include a file name, the output shows the space available on all currently mounted filesystems. Disk space is shown in 1K blocks by default:

df -h

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List All Block Devices in Linux

lsblk

lsblk

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Linux

Mount network share

sudo mount.cifs //192.168.1.252/5tb /5TB -o user=USER,pass=PASS

Install CIFS

sudo apt install cifs-utilsΒ 
mount.cifs //192.168.1.251/hel /mnt/share/NAS/hydra -o user=USER,pass=PASS
Linux

Vault 2 issues with Nginx Proxy not working

Check logs in Portainer - bind port already used (80)

 lsof -i tcp:80


This will show whats running on that Β port

fuser -k 80/tcp


This should kill the process, but if not do the below (based on the COMMAND Name)

systemctl stop haproxy


Linux

πŸ“‚ Sharing a Folder on Debian Linux via Samba

Last Updated: 2025-06-01
Applies To: Debian 10+, Ubuntu, other Debian-based distributions
Use Case: Share a local folder over the network for access from Windows, macOS, or Linux machines.

🧰 Prerequisites

πŸ”§ Step 1: Install Samba

Update the system and install Samba:

bash
sudo apt update sudo apt install samba

πŸ“ Step 2: Create a Shared Directory

Choose or create the folder to share. Example:

bash
sudo mkdir -p /srv/share sudo chown nobody:nogroup /srv/share sudo chmod 0775 /srv/share

This creates a public share folder with loose permissions (for anonymous access).

πŸ› οΈ Step 3: Configure Samba

Edit the Samba configuration file:

bash
sudo nano /etc/samba/smb.conf

Add the following to the bottom of the file:

ini
[PublicShare] path = /srv/share browseable = yes read only = no guest ok = yes force user = nobody

πŸ“Œ Tip: force user = nobody ensures files are written as the nobody user, preventing permission issues.

πŸ”„ Step 4: Restart Samba Services

bash
sudo systemctl restart smbd

πŸ”₯ Step 5: Open Firewall (If Enabled)

For systems using ufw (Uncomplicated Firewall):

bash
sudo ufw allow 'Samba'

Or manually:

bash
sudo ufw allow 137,138/udp sudo ufw allow 139,445/tcp

πŸ§ͺ Step 6: Access the Share

From a Windows or Linux machine:

You should see the shared folder contents.

πŸ” Optional: Secure with Username/Password

To restrict access:

  1. Disable guest access:

    ini
    guest ok = no

  2. Create a Samba user:

    bash
    sudo smbpasswd -a <your-linux-user>

  3. Restart Samba:

    bash
    sudo systemctl restart smbd

You’ll now need a username/password to access the share.

🧹 Troubleshooting

Problem Fix
Can't connect to share Check firewall, Samba config syntax, and network IPs
Files not writable Check folder permissions and force user setting
Authentication issues Ensure Samba user exists and password is set via smbpasswd
Linux

πŸ“š Mounting a Network Share for Docker on Debian

Β 

🧭 Overview

This guide shows how to mount a CIFS/SMB network share on a Debian-based system and use it as a volume in Docker Compose. Useful when your Docker container needs access to shared files hosted on another machine (e.g., a NAS, Windows PC, or another Linux box).

πŸ› οΈ Step 1: Install CIFS Utilities

sudo apt update
sudo apt install cifs-utils

πŸ“‚ Step 2: Create a Mount Point

sudo mkdir -p /mnt/downloads

πŸ” Step 3: Mount the Share

sudo mount -t cifs //LORGAR/Downloads /mnt/downloads -o username=slitzer,password=blink182,vers=3.0

Replace:

πŸ’Ύ Optional: Persistent Mount via fstab

Edit /etc/fstab:

//LORGAR/Downloads /mnt/downloads cifs username=slitzer,password=blink182,vers=3.0,uid=1000,gid=1000 0 0

Using a secure credentials file:

# /root/.smbcredentials
username=slitzer
password=blink182

Then in /etc/fstab:

//LORGAR/Downloads /mnt/downloads cifs credentials=/root/.smbcredentials,vers=3.0,uid=1000,gid=1000 0 0

Don't forget: chmod 600 /root/.smbcredentials

🐳 Step 4: Use in Docker Compose

Update your docker-compose.yml:

version: '3'
services:
  myapp:
    image: myapp/image
    volumes:
      - /mnt/downloads:/app/shared

This maps the mounted network share inside the container.

πŸ” Troubleshooting

βœ… TL;DR

sudo apt install cifs-utils
sudo mkdir -p /mnt/downloads
sudo mount -t cifs //REMOTE_HOST/Share /mnt/downloads -o username=...,password=...,vers=3.0

Then reference /mnt/downloads in your Docker volumes.

🧠 Pro Tip: Avoid hardcoding passwords by using credential files, especially for systems in production.

PowerShell / CMD

PowerShell / CMD

Exchange Powershell CMDs

Step 1: Start PowerShell

Using any of these methods, or any other you may know of:

WinKey + R (Run Dialog): powershell.exe

Start Menu -> type 'Powershell', click it

Navigate to C:\Windows\System32\WindowsPowerShell\V1.0\powershell.exe

Step 2: (optional/dependent) Connect to the AD Sync Server

If you're running PowerShell on the Server where AD Connect is running, skip this step.

In the command window run the following command, replacing [SERVERNAME] with the name of the server you need to connect to (you may not be able to do this is PSRemoting is not enabled on the remote server):

Enter-PSSession -ComputerName [SERVERNAME]


Step 3: Import the ADSync Module

Run the following command:

Import-Module ADSync

Step 4: Run the Sync Command

Run the following Command(s):

For a Delta Sync (most common, and used for most situations):

Start-ADSyncSyncCycle -PolicyType Delta

For a Full Sync (only necessary in some situations):

Start-ADSyncSyncCycle -PolicyType Initial

Step 5: (Optional/Dependent) Exit PSSession

If you used the Enter-PSSession command, you must exit the session or it will remain open even after terminating the PS Host. You can do so by simply using the command: Exit

PowerShell / CMD

Unlock Account

unlock CMD account (codeblue)

NET USER codeblue /ACTIVE:YES


PowerShell / CMD

CMD - Free Diskspace

Gives free diskspace, change drive letter as needed

powershell -command "(Get-PSDrive C).Free/1GB"