linux bulk prefix filenames

 

In order to bulk add prefix to filenames  in a directory run the following comnmand

for f in * ; do mv -- "$f" "2018-05-24_$f" ; done

*solution taken from: https://stackoverflow.com/a/4787428 

Installing nodejs 13 on linux mint

Installing nodejs 13 on linux mint

by default the  sudo apt-get install -y nodejs will install v8.10.0
in order to install version 13 you need to add the v13 repository to the update manager


In the terminal type:
curl -sL https://deb.nodesource.com/setup_13.x | sudo -E bash -

then run:

sudo apt-get install -y nodejs

That's it,

sql joins

Inner join:

SELECT users.name, phones.phone FROM `phones` INNER JOIN users ON users.ID = phones.userID

Left join:

SELECT users.name, phones.phone FROM `users` LEFT JOIN `phones` ON users.ID = phones.userID

Right join:

SELECT users.name, phones.phone FROM users RIGHT JOIN phones ON users.ID = phones.userID

Creating local virtual directory

#Create soft link:
ln -s /path/to/real/folder /path/to/symbolic/link

# Example:
ln -s /path/to/real/folder /var/www/html/symbolic_link
------------------------------------------------------------------------------------------------

#add virtual domain to yor local machine (hosts file)

sudo nano /etc/hosts
------------------------------------------------------------------------------------------------
# add to follow line and save the file:

127.0.0.1 the-domain-that-you-want-to-add.com

------------------------------------------------------------------------------------------------
#configure your apache to work with the new configured domain in the hosts file

sudo nano /etc/apache2/sites-available/000-default.conf
------------------------------------------------------------------------------------------------
#add the following configuration

<VirtualHost *:80>

    ServerAdmin your@email.com

    ServerName the-domain-that-you-want-to-add.com

    ServerAlias www.the-domain-that-you-want-to-add.com

    DocumentRoot /var/www/html/symbolic_link

    ErrorLog ${APACHE_LOG_DIR}/error.log

    CustomLog ${APACHE_LOG_DIR}/access.log combined

                <Directory /var/www/html/symbolic_link>

                                Options Indexes FollowSymLinks MultiViews

                                AllowOverride All

                                Order allow,deny

                                allow from all

                </Directory>

</VirtualHost>

------------------------------------------------------------------------------------------------

that's it
Now open your browser and navigate to http://the-domain-that-you-want-to-add.com

Check max profit by buying & selling day

See the Pen Check max profit by buying & selling day by Ariel Barkan (@ArielBarkan) on CodePen.

JS Inheritance OOP

See the Pen JS Inheritance OOP by Ariel Barkan (@ArielBarkan) on CodePen.

Creating Array of Objects + search

JS Bin on jsbin.com

Chrome Developer tools > make readable minified JavaScript with Pretty print {}

Chrome Developer tools >  Sources tab > Select the minified JavaScript > click the curly brackets {}  at the bottom

Linux mint: can't access a shared partition created by the Windows partition

How yo fix it:
Type in your terminal: : sudo ntfsfix /dev/sda7

Error mounting /dev/sda7 at /media/ariel/shared: Command-line `mount -t "ntfs" -o "uhelper=udisks2,nodev,nosuid,uid=1000,gid=1000,dmask=0077,fmask=0177" "/dev/sda5" "/media/ariel/shared"' exited with non-zero exit status 14: The disk contains an unclean file system (0, 0).
Metadata kept in Windows cache, refused to mount.
Failed to mount '/dev/sda7': Operation not permitted
The NTFS partition is in an unsafe state. Please resume and shutdown
Windows fully (no hibernation or fast restarting), or mount the volume
read-only with the 'ro' mount option.


This is the error message:

This is the solution:

Upgrading from Linux Mint 17.2 “Rafaela” to Linux Mint 17.3 “Rosa”

ORIGIN : http://sourcedigit.com/17812-linux-mint-17-3-rosa-download-upgrade/

First of all, run the following commands to update the system to the current stable state:

$ sudo apt update
$ sudo apt upgrade
$ sudo reboot

After updating the system, we need to update the distribution code (change the name of the official repositories for Rosa packages). Run the following commands to do so:

$ sudo sed -i 's/rafaela/rosa/' /etc/apt/sources.list
$ sudo sed -i 's/rafaela/rosa/' /etc/apt/sources.list.d/official-package-repositories.list

Finally, run the commands to update the system files and the distribution package:

$ sudo apt update
$ sudo apt upgrade
$ sudo apt dist-upgrade

Once the system-update process is complete, restart the system – manually or use the command “sudo reboot” (without quotes).

Running Fiddler on Linux

http://blog.michaelhidalgo.info/2015/06/fiddler-up-and-running-on-linux-mint.html?m=1

The Ultimate Guide to Ideal Image Sizes for Social Media Posts

The Ultimate Guide to Ideal Image Sizes for Social Media Posts

apt-get warning: No support for locale: en_US.utf8

http://askubuntu.com/questions/99651/apt-get-warning-no-support-for-locale-en-us-utf8

Google Event 2015 - Nexus 6P 5X Marshmallow Chromecast

Google Event 2015 - Nexus 6P 5X Marshmallow Chromecast

Google Event 2015 - Nexus 6P 5X Marshmallow Chromecast

Getting the windows serial number from the BIOS while running Linux mint*

Copy & paste (ctrl+shift+V) into your terminal window

sudo hd /sys/firmware/acpi/tables/MSDM 

*Might work on other Linux distributions.

Solved my battery calibration on lenovo z-80 and linux mint 17,2

http://forums.linuxmint.com/viewtopic.php?f=49&t=160379

PHP mail() function enable on DigitalOcean.com

log has root or use sudo apt-get install php-pear 
pear install mail 
pear install Net_SMTP 
pear install Auth_SASL 
pear install mail_mime 
apt-get install postfix 
vi /etc/php5/apache2/php.ini (set sendmail path to /usr/sbin/sendmail -t -i)
Reboot apache gracefully apachectl graceful

Thanks to info, original answer at https://www.digitalocean.com/community/questions/php-mail-function-enable

Clear sound on electric guitar amplifier fender mustang 1 v2

After few weeks that I tried to set my guitar amplifier  fender mustang 1 v2 to produce "crystal clear" sound + two days of thoughts about selling the amp and buy a "better one", I finally found the way to get clear sound.

1. Turn off the amplifier
2. Press the "TAP" button.
3. Turn on the amplifier while the "TAP" button is pressed.
4. That's it!
•  No effects, no gain, no reverb, no cool effects. JUST CLEAR SOUND.

How to make a bootable Mavericks install drive (usb, disk on key)

The text below is "copy paste" from liondiskmaker site. version 3 supports the Mavericks installer

Link: http://liondiskmaker.com/ 

DiskMaker X (formerly Lion DiskMaker) is an application built with AppleScript that you can use with Mac OS X 10.6, 10.7, OS X 10.8 and 10.9 to build a bootable drive from Mac OS X Lion, OS X Mountain Lion Installation or OS X Mavericks Installer program. As soon as you launch the application, it tries to find the OS X Install program with Spotlight. Then, it proposes to build a bootable install disk and make it look as nice as possible. It’s the easiest way to build an OS X Installer in a few clicks !