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How to check GMail inbox from command line
August 01, 2016
First of all we have to create an application password here.
Then, create bash script like this one: 
#!/bin/bash

# crontab example line
# */4 * * * * /home/username/check-gmail.sh 

export DISPLAY=:0

username="your-email@gmail.com"
password="your-app-password"

/usr/bin/curl -u $username:$password --silent "https://mail.google.com/mail/feed/atom" | \
  grep -oPm1 "(?<=<title>)[^<]+" | sed '1d' | \
  while read line; do 
    /usr/bin/notify-send -i xfce-newmail "You've got new mail!" "$line" -t 5000
  done
After that, you can add this script to your cron using crontab -e. As you see, notify-send is used here to display system notification (XFCE, in my case) for each new mail received, in your case you can change that in the way you like.
Original note here.
linux


Debian + XFCE xscreensaver alternative screen lock
April 06, 2016
Step one 
sudo apt-get purge xscreensaver xscreensaver-data
Step two 
sudo apt-get install light-locker
Step three 
# which light-locker-command 
/usr/bin/light-locker-command
Step four
Bind global hotkey (keyboard settings for XFCE case) for command /usr/bin/light-locker-command -l
Based on this solution
linux


Debian: Decoupling VLC volume and system volume
March 31, 2016
Step 1 
vim /etc/pulse/daemon.conf
Then find and change line with flat-volumes to 
flat-volumes = no
After that we have to restart pulseaudio without restart 
pulseaudio -k
pulseaudio -D
Source solution note is here
linux


How to extract .tar.xz to selected folder?
March 04, 2016
It's simple 
tar -xJvf archive-file.tar.xz -C ~/dest/folder/name
Also simple for regular .tar.gz files 
tar -xzvf archive-file.tar.gz -C ~/dest/folder/name
linux ubuntu


How to install Plank Dock on Debian 8 - simple dock for Debian
February 24, 2016
Plank homepage is here: launchpad.net/plank
0. Download & extract sources
1. Install dependencies 
sudo apt-get install automake gnome-common intltool pkg-config valac libbamf3-dev libdbusmenu-gtk3-dev libgdk-pixbuf2.0-dev libgee-dev libglib2.0-dev libgtk-3-dev libwnck-3-dev libx11-dev libgee-0.8-dev
2. Compile and install 
./configure
make
sudo make install
3. Update shared libraries 
sudo ldconfig
4. Run plank, or plank preferences window 
plank &
plank --preferences
Source solution is here www.techbear.co/installing-plank-dock-on-debian-jessie
linux


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