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Meaning of CHMOD

Chmod is the option for us to make file or folder have privilage status.
Standard form of chmod is:

$ chmod 421

The first digit : the file / folder is for user.
The second digit : file / folder is for group.
The third: universal user.

The amount of the number, has meanings:
4 >> Allow Read
2 >> Allow Write
1 >> Allow Execute

It is a standar number of chmod. If you meet 7,6,5,3, it must amount of standar number.
7 = 4 + 2 + 1
6 = 4 + 2
5 = 4 + 1
3 = 2 + 1

notes:
.. parent

elshadino act

Reconfigure Resolution

| UBUNTU |

Playing with xorg.conf can make monitor malfunction. Like can't enter the xorg server. To backup your the configuration of xorg.conf, give this command operation on your console:

$ sudo dpkg-reconfigure -phigh xserver-xorg

Automatically, your screen resolution will be health.

elshadino act

Install MySQL in Ubuntu

| UBUNTU |

It may seem easy for some, but for others, installing MySQL on Ubuntu or Debian Linux is not an easy task. This article explains to you how to install the MySQL Server and Client packages on a Ubuntu/Debian system.

First of all, make sure your package management tools are up-to-date. Also make sure you install all the latest software available.

sudo apt-get update
sudo apt-get dist-upgrade

After a few moments (or minutes, depending on the state of your system), you’re ready to install MySQL.

By default, recent Ubuntu/Debian systems install a MySQL Server from the 5-branch. This is a good thing, so don’t worry.

First, install the MySQL server and client packages:

sudo apt-get install mysql-server mysql-client

When done, you have a MySQL database read to rock ‘n roll. However, there’s more to do.

You need to set a root password, for starters. MySQL has it’s own user accounts, which are not related to the user accounts on your Linux machine. By default, the root account of the MySQL Server is empty. You need to set it. Please replace ‘mypassword’ with your actual password and myhostname with your actual hostname.

sudo mysqladmin -u root -h localhost password 'mypassword'
sudo mysqladmin -u root -h myhostname password 'mypassword'

Now, you probably don’t want just the MySQL Server. Most likely you have Apache+PHP already installed, and want MySQL to go with that. Here are some libraries you need to install to make MySQL available to PHP:

sudo apt-get install php5-mysql

Or for Ruby:

sudo apt-get install libmysql-ruby

You can now access your MySQL server like this:

mysql -u root -p

Have fun using MySQL Server.


source: ariejan.net