To clear username from terminal in linux simply add the following to the end of your ~/.bashrc file, then logout and login!

export PS1="\W \$ "

Solves : How to hide computer name and user name in terminal

The best tool for a ramdisk on linux is simply adding the following line to your /etc/fstab.  Create the new mount directory first of course.

mkdir -p /mnt/ramdisk
sudo echo "tmpfs           /mnt/ramdisk tmpfs      defaults,size=8192M 0 0" >> /etc/fstab
sudo mount -a

If you’re tired of paying for a DigitalOcean droplet and want to save money, you can migrate your droplet to an Unraid VM using this simple guide. By running your VPS locally, you could save hundreds or thousands of dollars a year. Here are the steps to follow:

Step 1: Set a Root Password for VNC

Before you start the migration, it’s important to set a root password for VNC. To do this, follow these steps:

1. Shutdown or restart your DigitalOcean droplet into Recovery Mode in the DO Control Panel.
2. Take note of the temporary root password shown in the console.

Step 2: Copy the Remote Disk Image of the DigitalOcean Droplet to Your Local Machine

Next, you need to copy the remote disk image of the DigitalOcean droplet to your local machine. You can do this with the following command:

ssh root@43.44.X.X "dd if=/dev/vda" | sudo dd of=88plug.raw bs=64k

This command will create a raw disk image of your DigitalOcean droplet and save it to a file called 88plug.raw on your local machine.

Step 3: Convert the Raw File to a Compatible IMG File for Unraid

After copying the disk image to your local machine, you need to convert it to a compatible img file for Unraid. You can do this with the following command:

qemu-img convert -p -O raw 88plug.raw disk.img

This command will create a disk image file called disk.img that is compatible with Unraid.

Step 4: Sync the Image File to Unraid

Next, you need to synchronize the disk image file to your Unraid server. You can use the following command to do this:

rsync -av --progress -e "ssh -T -c aes128-ctr -o Compression=no -x" disk.img root@tower.local:/mnt/user/domains/88plug/

This command will copy the disk image file to your Unraid server and save it to /mnt/user/domains/88plug/ the directory.

Step 5: Create a New VM with the Same OS as Your DO Droplet

Finally, you need to create a new virtual machine in Unraid with the same operating system as your DigitalOcean droplet. You can do this using the Unraid web interface or command line interface, and you’ll need to import the disk image file you created in Step 3. Here’s an example command to import the disk:

qm importdisk $VMID disk.img local-lvm

And to confirm the VM is created, you can list all available VMs with:

qm list

Bonus round: For other systems use the handy table below

Bonus Round: Convert Raw to QCOW2 for Proxmox

If you’re using Proxmox, you’ll need to convert the raw file to a QCOW2 file format. You can do this with the following command:

qemu-img convert -p -O raw 88plug.raw disk.qcow2

So you’ve finally installed ProxMox, now what?!

1. Install a GUI!
2. Configure Disks / Raid / Filesystems
3. Run XShok!

wget https://raw.githubusercontent.com/extremeshok/xshok-proxmox/master/install-post.sh -c -O install-post.sh && bash install-post.sh && rm install-post.sh

To enable gnome for proxmox the process is very simple. First setup proxmox, and then run the following shell commands in proxmox

tasksel install desktop gnome-desktop
#Then enable gnome on startup
sudo systemctl set-default graphical.target
#Now disable gdm-password for root login check
sed -i 's/.*pam_succeed_if/#&/' /etc/pam.d/gdm-password
reboot
#Now login with console ! 

Using tasksel is the fastest way to install gnome on debian.

sudo tasksel install desktop gnome-desktop
#Then enable gnome on startup
sudo systemctl set-default graphical.target

Limit cpu and memory of all running docker containers

docker update --cpus 0.5 $(docker ps -qa) ; docker update -m 512M --memory-swap -1 $(docker ps -qa)

Get coloured terminal over ssh

cp /etc/skel/.bashrc ~/.bashrc
sed -i ‘s/#force_color_prompt=yes/force_color_prompt=yes/g’ ~/.bashrc
source ~/.bashrc

Use Manjaro linux as a headless server.
https://github.com/88plug/manjaro-headless

Upload the Manjaro Minimal with XFCE ISO to Vultr or your hosting provider/server and use host Console to install with default options.

https://osdn.net/dl/manjaro/manjaro-xfce-18.1.5-minimal-191229-linux54.iso.torrent

Run the automated installer

git clone https://github.com/88plug/manjaro-headless ; cd manjaro-headless ; sudo ./run.sh

Fixes systemd-resolved[356]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level UDP.

ln -fs /run/systemd/resolve/resolv.conf /etc/resolv.conf

The symlink on various VPS providers in incorrectly set. So this command updates the symlink to /run/systemd/resolve/resolv.conf

To easily cleanup disk space from mariadb cluster, purge the binary log in a mariadb cluster.

PURGE BINARY LOGS BEFORE (NOW() - INTERVAL 18 HOUR);

ping and get ip only bash

getent ahostsv4 wildvm.local | awk '{print $1}' | head -1