Color Meanings in Terminal

Blue color – Directory
Green color – Executable or recognized data file
Sky Blue Color – Linked file
yellow with black background – device
Pink colour – graphic image file
Red – Archive file

More information:

• You can turn them off in $HOME/.bashrc file
• You can see more detail by enter command follow: man dir_colors

Source: Color meaning in terminal

How to install WordPress on ubuntu 12.04

Step 1: Install apache2:

sudo apt-get install apache2

Step 2: Install mysql:

sudo apt-get install mysql-server-5.5

Step 3: Install php5

sudo apt-get install php5 libapache2-mod-php5

Step 4: Test installation:

• Restart apache2

  sudo /etc/init.d/apache2 restart

• Create /var/www/phpinfo.php

  sudo gedit /var/www/phpinfo.php

• Add text follow to file:

   <?php phpinfo(); ?>

• And Save and close.

Step 5: Install the MySQL Module for PHP

sudo apt-get install php5-mysql

Step 6: Create database workpress

Login mysql: mysql -u root –p
CREATE DATABASE wordpress;
CREATE USER wordpress_user;
SET PASSWORD FOR wordpress_user = PASSWORD(“wordpress_pass”);
Grant all privileges to access the database: 
GRANT ALL PRIVILEGES ON wordpress.* TO  wordpress_user@localhost  IDENTIFIED BY ‘wordpress_pass’;
NOTE: To end command, you must be semicolon (;).

Step 7: Install wordpress.

• Create /var/www/wordpressfolder:

  sudo mkdir /var/www/wordpress

• Change mode for wordpress folder to read and write it:

  chmod -c 777 -R /var/www/wordpress/

• Download wordpress . After download completed, Extraxt it to /var/www/wordpress.

Step 8: Configuration wordpress:

• open wp-config-sample.php file and modify such as:

  /** The name of the database for WordPress */
  define('DB_NAME', 'wordpress');
  
  /** MySQL database username */
  define('DB_USER', 'wordpress_user');
  
  /** MySQL database password */
  define('DB_PASSWORD', 'wordpress_pass');

• And then save it with name wp-config.php.

Step 9: Now, open web browser and browser to http://localhost/wordpress to see result.
If you see this error: Error Establishing a Database Connection. It means you have done something wrong.

DONE.

Source: install-wordpress-locally-on-ubuntu-desktop

How to create ubuntu-custom

Description:

• Ubuntu-custom is Ubuntu version which have more softwares that you installed.

How to create:

1. Install Remastersys:
   • Add remastersys for source. Open /etc/apt/sources.list file and add this line to end file:

     deb http://www.remastersys.com/ubuntu precise main
     Note: This is Add Remastersys for Ubuntu 12.04 Precise. For others, see at end page remastersys.

   • Update source:

     sudo apt-get update

   • Install:

     sudo apt-get install remastersys
     Note: If you encounter error message, you can ignore them.

2. Create Ubuntu-custom:
   • Open terminal and Enter the command follow:

     sudo remastersys backup

   • When completed, 1 custom.iso file will created in remastersys folder.
3. Source: creating-custom-ubuntu-live-cd-with-remastersys
4. Done.

Error: Could not get lock /var/lib/dpkg/lock

Description:

• When you use apt-get to install 1 package and you encounter message:

  E: Could not get lock /var/lib/dpkg/lock - open (11 Resource temporarily unavailable)
  E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?

Solution:

• Solution 1:
  Open System Monitor –> process, find apt-get process and end it.
• Solution 2:
  If apt-get doesn’t show up in the list of processes, here’s a work around to fix this:
  • Step 1: Open terminal, press Alt + Ctrl + T.
  • Step 2: Remove /var/lib/dpkg/lock file:

    rm /var/lib/dpkg/lock
    Recommend: you should change name instead of remove it. Reason: you can restore it if you encounter some error.
    You can use command follow to change name:
    mv /var/lib/dpkg/lock /var/lib/dpkg/lock_backup

  • Step 3: Recreate /var/lib/dpkg/lock file:

    sudo dpkg --configure -a

  • Step 4: Now, you can run apt-get to install your package.

  DONE

Pin application to Dash Home and Launcher in Ubuntu

Example: Create launcher for eclipse.

Using Tool Alacarte:

• Press Alt + F2 and Type alacarte and Enter:
  
• Dialog Main menu show:
  
• Choose New Item. Dialog Create Launcher show:
  
• Choose application eclipse to create. And then press OK.
• Now, Eclipse show in Main menu and Dash Home:
  
  
• Drag and drop it to Launcher to pin it in Launcher.

Using file:

• Create 1 file eclipse.desktop in ~/.local/share/applications/. Enter command follow in terminal:

  mkdir ~/.local/share/applications/eclipse.desktop

• Open eclipse.desktop file to edit:

  gedit ~/.local/share/applications/eclipse.desktop

• Add text in below to eclipse.desktop file:

  [Desktop Entry]
  Type=Application
  Name=Eclipse
  Comment=Eclipse IDE
  Icon = <path-eclipse-icon>/icon.xpm
  Exec = <path-eclipse-executable>/eclipse
  Terminal=false
  Categories=Development;IDE;Java;

• Save and Close file.
• Drag and drop eclipse.desktop file to Dash Home and launcher.

DONE.

Folder is Hidden in Window

Description:

• Folder is Hidden although checked property “show file and folder hide” in window explorer.

Reason:

• “Hidden” Attribute of folder is checked.

Solution: unchecked “Hidden” attribute of folder.

• How to access folder when it hidden:
  1. Type directory path to this folder on URL bar and Enter.
  2. Use “Search result” to find out folder and then double-click folder.
• And then, right-click on folder and uncheck Hidden attribute
• Now, folder is show again.

DONE.

How to fix error grub sescue

Description:

• Path of root and prefix point to grub is wrong.

Symptoms:

• Start up computer and go to black screen with GRUB RESCUE prompt.

Reason:

Install dual boot (Window and ubuntu) on disk drive and then Resize partition on disk drive.

Solution: Set path of prefix and root to partition contain grub

• Step 1: At prompt, to list all partition have on disk drive, use command follow:

  ls
  NOTE: if you know partition that contain grub, you can ignore this step.

• Step 2: Set path for prefix and root, enter command follow:

  set prefix=(hdX,Y)/boot/grub
  set root=(hdX,Y)
  NOTE: hdX,Y is partition contain grub. X: is number your disk drive, Y: is number partition on disk drive.
  Tip: To show hdX,Y contain grub, use cammand: ls hdX,Y/, If The "hdX,Y" which contain boot ==> It contain grub.  
  

• Step 3:If you want to show information that you just set, you can use command follow:

  set

• Step 4: Install loadable kernel module

  insmod /boot/grub/linux.mod

• Step 5: Enter the linux line information

  linux /vmlinuz root=/dev/sdXY ro

• Step 6: Boot loader initialized RAM disk

  initrd /initrd.img

• Step 7: Finally, Enter command follow:

  boot

Summary:

ls - (optional)
set prefix=(hdX,Y)/boot/grub
set root=(hdX,Y)
set - (optional)
insmod /boot/grub/linux.mod
linux /vmlinuz root=/dev/sdXY ro
initrd /initrd.img
boot

SOURCE: restore grub at #5

DONE.