This command makes a file executable.
sudo chmod +x [filename]
This command opens up the setting window (time zone check and enabling ssh connection).
sudo raspi-config
Cron has different time zone sometimes than the system clock. By this command they can be synchronized.
sudo /etc/init.d/cron restart
Cron time dependent tasks can be set up in the log file that can be opened with:
crontab -e
This command runs the python code (even if root privilege is required).
sudo python [filename]
Displays file and jumps to the end of it:
cat [filename]
Displays file one page at once:
pg [filename]
Returns local IP address.
hostname -I
Resets the root password.
sudo passwd root
