Useful simple commands

• Repeat last command as sudo: sudo !!
• Check wifi strength: watch -n1 iwconfig
• Change keyboar mapping: sudo dpkg-reconfigure keyboard-configuration
• instal Exchange Web Server for Evolution: sudo apt-get install evolution-ews
• share folder over network: python3 -m http.server (use ifconfig to find the IP address)
• minimize windows with taskbar icon: gsettings set org.gnome.shell.extensions.dash-to-dock click-action 'minimize'

Nvidia graphic card an dual monitor

Open the file in your favorite editor (vim, nano, gedit, etc.).

sudo nano /lib/modprobe.d/nvidia-kms.conf

And comment out the the nvidia-drm modeset option.

# This file was generated by nvidia-prime
# Set value to 0 to disable modesetting
# options nvidia-drm modeset=1

Create Bootable usb stick

fdisk -l
sudo dd bs=4M if=./manjaro-gnome-18.1.5-minimal-191229-linux54.iso of=/dev/sdb status=progress & sync
sudo wipefs --all /dev/sdX # if you want to wipe out the usb drive

Enable write cache

sudo hdparm -i /dev/sda #to check if the cache writing is enabled
sudo gedit /etc/hdparm.conf

Comment the line “#write_cache = off” (without quotes) by removing the # at its beginning. So it looks like:

    -W Disable/enable the IDE drive’s write-caching feature write_cache = off

Swap

check swappiness

cat /proc/sys/vm/swappiness

change swappiness

gedit admin:///etc/sysctl.conf
add the following line:
    vm.swappiness = 10