Compiling Busybox stuff

Busybox
https://github.com/mirror/busybox/releases/tag/1_36_1
make menuconfig
make
You might need to edit .config 
Set the CONFIG_TC to N and another CONFIG_TCPSVD to N as well to build on latest kernel

DOwnload deb and extract binary
https://pkgs.org/search/?q=xxx
ar x xxx.deb

Bash shortcuts!

Find all files that smells like xxx and copy to thumb

find /search/root -type f -name '*partial*' -exec cp --parents -t /media/user/thumb {} + 

Getting a specific app version
apt update
#LIst all available versions
apt-cache policy <package_name>
#install the specific version
sudo apt install <package_name>=<package_version>

Cryptsetup!
cryptsetup luksFormat /dev/sss
cryptsetup luksOpen /dev/sss lala
sudo mkfs.ext4 /dev/mapper/lala
sudo mkdir /mnt/encrypted
sudo mount /dev/mapper/lala /mnt/encrypted

sudo umount /mnt/encrypted
sudo cryptsetup luksClose encrypted_drive 

* https://codelucky.com/cryptsetup-command-linux/ 

Reverse SSH
ssh -N -L 18789:127.0.0.1:18789 user@somewhere
 

Multiple VNC Users on a debian / ubuntu

Problem: My kids want to VNC into a VM and use it.

Solution: 

apt update && apt install tigervnc-standalone-server xfce4 xfce4-goodies

adduser kid1

su - kid1

You should now be in the kid1 user.

==== KID1 ====

vncpasswd

nano ~/.vnc/xstartup

==== CODE ====

#!/bin/sh

unset SESSION_MANAGER

unset DBUS_SESSION_BUS_ADDRESS

exec startxfce4

==== CODE ====

chmod +x ~/.vnc/xstartup

exit

==== KID1 ====

On the server, 

nano /etc/tigervnc/vncserver.users 

==== CODE ====

:3=kid1 #This means port 5900 + 3 = kid1 screen

==== CODE ====

systemctl daemon-reload

systemctl enable tigervncserver@:3.service

systemctl start tigervncserver@:3.service

Might need UFW allow

ufw allow 5901:5905/tcp

Default is listen to 127.0.0.1

To listen to 0.0.0.0

vim /etc/tigervnc/vncserver-config-defaults 

enable > $localhost="no"

Blank screen after some time while using ESXi + Ubuntu / Debian

Problem: After some time, the screen went black. From VCSA, unable to click console.

Solution1: If you still can ssh, ssh in and issue `sudo systemctl restart gdm` for a temp fix.

Solution2: `sudo apt install -y dconf-editor gnome-shell-extension-manager`

Run dconf-editor in a GUI, search for power especially org > gnome > settings-daemon > plugins > power > ambient-enabled.

Turn off all sleep features.

Solution 3:

Changing the settings in /etc/gdm3/custom.conf to WaylandEnable=false worked well.

Links: https://github.com/vmware/open-vm-tools/issues/725