You can use the Adafruit ATMega32u4 breakout board  as an Arduino Leonardo by flashing the bootloader in Arduino 1.0.1 to the board.

If you use the Linux shell very much, you find its history functions very useful. You can recall previous commands very easily, just using the arrow keys.

This is a quick cookbook to edit your Sieve filter rules on the mail server.

Backup

/usr/bin/mysqldump --user=dbuser --password=dbpass --host=localhost --add-drop-table dbname > backups/mydbdump.sql

Restore: (if the db exist)

mysql -u root -p[root_password] [database_name] < dumpfilename.sql

mysql -u root -ps3cre3t

$ sudo firewall-cmd --direct --add-rule ipv4 filter INPUT 0 -m state --state NEW -m udp -p udp --sport 5002 -j ACCEPT
success
$ sudo firewall-cmd --direct --add-rule ipv4 filter INPUT 0 -m state --state NEW -m udp -p udp --sport 5004 -j ACCEPT
success

Now that I'm playing in a couple cover bands, I notice a song that's often covered is "The Weight."