Sys Admin

sudo apt install ssh ssh-keygen #generate private and public keys (on the client) ssh-copy-id root@192.168.0.102 #copy keys to the server (does not work on windows) ssh 192.168.1.2 #conectar por el puerto por defecto 22 ssh user@192.168.1.2 ssh user@google.com ssh -p 2233 user@192.168.1.2 #por el puerto especifico 2233 o cualquier otro cat /var/log/auth* | grep Failed #ver intentos fallidos ssh #Config SSH Configuration: nano /etc/ssh/sshd_config Port 22 #Cambiar por otro (Por ejemplo Port 2233) ChallengeResponseAuthentication no #Disable ssh access with password authentication PasswordAuthentication no #Disable ssh access with password authentication AllowUsers (tab) <user> #allow access to <user> sudo service ssh status sudo service ssh restart #reiniciar el servicio ssh sudo service ssh stop #detener conexiones ssh sudo reboot #reiniciar el server #COPY PUB KEY FROM Windows to Linux #1. Move your public key (id_rsa.pub) and your private key (id_rsa) to C:\Users\yourUserName #2. On your windows host via cmder: cp C:\Users\yourUserName\.ssh\id_rsa.pub C:\Users\yourUserName\authorized_keys #3. On your ubuntu host: service ssh status (Start ssh if necessary) mkdir ~/.ssh/ (if it doesn't already exist) #4. On your Windows host via cmder: cd C:\Users\yourUserName\ scp authorized_keys login-id@ubuntu-Host-Ip:~/.ssh #5. On your Ubuntu host: chmod 700 ~/.ssh chmod 600 ~/.ssh/authorized_keys //Or copy paste the pub key inside this file #6. On your Windows host via cmder: Test if you can ssh into your ubuntu host without login/pw auth. If yes: rm C:\Users\yourUserName\authorized_keys #In Digital Ocean just copy-paste the pub key

# zfs list # zfs create DataStore/nextcloud # zfs list

wget https://download.onlyoffice.com/docs/docs-install.sh

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$ lsblk -o +MODEL,SERIAL $ ls /dev/disk/by-id # qm set 103 -scsi1 /dev/disk/by-id/ata-WDC_WD10EZEX-08WN4A0_WD-WCC6Y5DHAZEH # qm set 103 -scsi2 /dev/disk/by-id/ata-WDC_WD10SPCX-24HWST1_WD-WX41AA5370LZ

$ rsync -avh /source_folder/ /destination_folder/ # Copy $ rsync -avh --progress /source/ /destination/ $ rsync -avh --progress --exclude '*.tmp' source/ destination/ $ rsync -avh --progress --delete source/ destination/ # Mirror $ rsync -avh --progress source/ user@remote:/destination/ # Remote $ rsync -avh -e ssh source/ user@remote:/destination/ # -a: Archive mode (preserves permissions, symbolic links, etc.) # -v: Verbose (shows detailed output of the transfer) # -h: Human-readable output (file sizes in readable format) # -r: Recursively copy directories (this is already included in -a) # --progress: Show progress during the transfer (useful for large files) # --delete: Delete files in the destination that don’t exist in the source (mirroring) # --exclude: Exclude specific files or directories from being copied # --dry-run: Show what would be copied without actually doing it (good for testing) # -e: Use a specific remote shell, such as SSH (Copying to/from remote systems)

$ rclone config # configure new remote $ rclone listremotes # list remotes $ rclone lsd gdrive: # list directories $ rclone lsf gdrive:folder # list files and folders $ rclone copy C:/Folder remote:folder -P # Copy $ rclone sync C:/Folder remote:folder -v -P --exclude "*.jpg" # Sync (Update changes) $ rclone rcd --rc-web-gui # web ui (experimental) C:/rclone/rclone.exe mount s3: J: --network-mode --vfs-cache-mode full --no-console # -v: Verbose # -P: --progress # --exclude: Exclude files # --include: Only include # --dry-run: Dry Run before sync or copy