By default, localhost (127.0.0.1) points to /var/www/ directory in Ubuntu. I prefer the location to be in my home directory.
To change the default location, open the file:

/etc/apache2/sites-available/000-default.conf

 and change it to look as follows:
(My wokspace is located at /home/chaithanya/www)

<VirtualHost *:80>
        ServerAdmin webmaster@localhost
        DocumentRoot /home/chaithanya/www

        <Directory /home/chaithanya/www/>
                Options Indexes FollowSymLinks
                AllowOverride All
                Require all granted
        </Directory>
        ErrorLog /var/log/apache2/error.log
        CustomLog /var/log/apache2/access.log common
</VirtualHost> 

Note: This works for Ubuntu 13.10+

When I tried to install Ubuntu 12.04 on my PC, it halted with 4/5 dots under Ubuntu. It's stuck at that point and no progress. Sometimes you may see some distorted image or white screen. All these problems are due to incompatible video drivers.

To get pass behind this screen and boot into the system, hold down SHIFT button while booting from CD/USB and press F6. Now select "nomodeset" option to prevent video drivers from loading.

Now you can install Ubuntu successfully. But you may face the problem again while booting (after installation). Then boot in "Recovery Mode" and install graphics drivers from GRUB menu or command line.

Previously I blogged about a good backup/sync tool rSync.

While using it, I faced some problems. It replaced my .git repository and there by affected my git repo settings.
I found a way to exclude sync'ing some files/folders. For this we have to use --exclude option. To exclude git sub-directory:

rsync -a --exclude='.git/'

 And to include some specific files, (Eg: 'c' files)

rsync -a --include='*.c/'

Source

 

 

1. Find what the drive is called

You'll need to know what the drive is called to mount it. To do that fire off:

sudo fdisk -l

You're looking for a partition that should look something like: /dev/sdb1. Remember what it's called.

2. Create a mount point

Create a new directory in /media so you can mount the drive onto the filesystem:

sudo  mkdir /media/usb

3. Mount!

sudo mount /dev/sdb1 /media/usb

When you're done, just fire off:

sudo umount /media/usb

Source: StackOverflow

Following are some of my favourite firefox add-ons
1. DoNotTrackMe
Protect your privacy. Stop companies and advertisers from tracking your browsing and sending you spam email.
2. AdBlock Plus
 Blocks annoying video ads on YouTube, Facebook ads, banners and much more. Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).
3. BugMeNot
Tired of creating multiple accounts on various websites, bypass compulsory web registration with the context menu via www.bugmenot.com.

4. DownThemAll

The first and only download manager/accelerator built inside Firefox!

5. Flash Video Downloader
Flash Video Downloader helps you to download any video (flv, mp4, HD) from YouTube-like, Facebook, Break, Metacafe and more in one click. You can download mp3, music (iPod), avi and more. Download Flash games. Download Helper.

Recently I came across Ubuntu version of WinUSB, a popular tool to make bootable Windows USB.
I found it to be easy and simple.
Here is the official website, where you can get this tool.

Rsync is a fast and extraordinarily versatile file copying tool. It can copy locally, to/from another host over any remote shell, or to/from a remote rsync daemon. It offers a large number of options that control every aspect of its behavior and permit very flexible specification of the set of files to be copied. It is famous for its delta-transfer algorithm, which reduces the amount of data sent over the network by sending only the differences between the source files and the existing files in the destination. Rsync is widely used for backups and mirroring and as an improved copy command for everyday use.

Rsync is installed in Ubuntu by default. If you need a GUI front-end, install Grsync. It is available in Ubuntu Software Center and also Synaptic package manager.

Usage:
Local backup

sudo rsync -azvv source/ destination/

Remote Backup

sudo rsync --dry-run --delete -azvv -e ssh source remoteuser@remotehost.remotedomain:/path-to-destination/

An explanation of above options to commands:

• --dry-run This tells rsync to not actually do anything. It will just write a log of what it would do to the screen. Once you've made sure everything will work as you expect, you have to remove this option, and run the command again to perform the actual backup.
• --delete deletes files that don't exist on the system being backed up.(Optional)
• -a preserves the date and times, and permissions of the files (same as -rlptgoD).
• With this option rsync will:
  • Descend recursively into all directories (-r),
  • copy symlinks as symlinks (-l),
  • preserve file permissions (-p),
  • preserve modification times (-t),
  • preserve groups (-g),
  • preserve file ownership (-o), and
  • preserve devices as devices (-D).
• -z compresses the data
• -vv increases the verbosity of the reporting process
• -e specifies remote shell to use 

 Source: Ubuntu Community