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 Add “GRUB_RECORDFAIL_TIMEOUT=0” in /etc/default/grub Then update GRUB by running sudo update-grub Credit: https://techz.io/disable-grub-boot-menu

Edit /etc/systemd/system.conf Uncomment and change the value at line DefaultTimeoutStopSec=90s Reboot for the change to take effect (it will not take effect yet after editing the file before reboot).

  sudo nano /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf   wifi.powersave = 2   Other value: 0: use the default value 1: don't touch existing setting 2: disable powersave 3: enable powersave

Install the CIFS Utils pkg sudo apt-get install cifs-utils Create a mount point sudo mkdir /mnt/local_share Mount the volume sudo mount -t cifs -o user=<user on Windows> //<windows_ip_address>/<share_folder> /mnt/<local_share> You will be prompted for password   To mount at boot, add to /etc/fstab file: //<windows_ip_address>/<share_folder>cifs user=<user on Windows>,pass=<user passwd> 0 0  

 mongo localhost:27017/db_name script_name.js > result

 Add at the end of file ~/.bashrc alias alias_command 'real command' To load newly created alias immediately: source ~/.bashrc

find mongodb config file sudo find / -name mongod.conf -print get dbPath from that file stop mongodb service mongod stop check mongodb is not running sudo systemctl status mongod copy all files from dbPath to new dbPath cp -r old_dbPath new_dbPath chown of new dbPath sudo chown -R mongodb:mongodb new_dbPath change dbPath in mongodb config file to new_dbPath start mongodb sudo systemctl start mongod

 https://wiki.gnome.org/Projects/Zenity

  sudo chattr -R -i "$HOME/Dropbox" sudo chown -R "$USER" "$HOME/Dropbox" chmod -R u+rw ~/Dropbox dropbox stop; rm -rf ~/Dropbox ~/.dropbox ~/.dropbox-dist; dropbox start -i   Note that Dropbox folder path point to default position. If you have changed this path, make appropriate corrections above

sudo su

sudo fdisk -l    mkdir /mnt/mount_name   sudo mount /dev/partition /mnt/mnt_name

speaker-test -t wav -c 6

playonlinux --run appName

sudo dpkg --remove --force-remove-reinstreq package_name

System Settings, Workspace, Workspace Behavior, General Behavior, Click behavior

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Run sudo visudo For certain command: username ALL = NOPASSWD: command 1 username ALL = NOPASSWD: command 1, command 2, command 3 Example hensem ALL = NOPASSWD: /bin/systemctl restart httpd.service, /bin/kill For everything: username ALL=(ALL) NOPASSWD:ALL For root: Find the line that says %admin ALL=(ALL) ALL and change it to %admin ALL=(ALL) NOPASSWD: ALL

In ~/.profile add these 2 lines: xhost +local: xhost Add env DISPLAY=:0 before cron command 00 06 * * * env DISPLAY=:0 gui_appname To run cron as root or anacron, add this to ~/.bashrc xhost local:mpromber > /dev/null