Audacity is a free digital sound editing application we can import sound format like mp3, wav etc and edit and export to any other sound format.

To install audactiy in ubuntu issue

sudo apt-get install audacity

One of the issue facing with audacity application is that the export to mp3 fromat will not work in the default installation.This is due to the absence of the lame mp3 encoder.

To solve this install it as follows.

sudo apt-get install  lame
sudo apt-get install  lame-extras
sudo apt-get install  lame-dev
sudo apt-get install  liblame0

Nmap is a tool that can be used to check the network status as well as the status of a particular port.

To install nmap issue

sudo apt-get install nmap

eg:

To check the status of a particular port in the local host we can issue

nmap -p 80 localhost

will give

Starting Nmap 4.53 ( http://insecure.org ) at 2008-04-17 18:58 IST
Interesting ports on localhost (127.0.0.1):
PORT STATE SERVICE
80/tcp open http

if its open.Similarly we can give any host name.

For scanning a network is live or not we can give

nmap -sP -vv 192.168.0.* | grep up

Host 192.168.0.1 appears to be up.
Host 192.168.0.100 appears to be up.
Host 192.168.0.101 appears to be up.
Host 192.168.0.102 appears to be up.
Host 192.168.0.103 appears to be up.
Host 192.168.0.104 appears to be up.
Host 192.168.0.111 appears to be up.
Host 192.168.0.112 appears to be up.
Host 192.168.0.115 appears to be up.
Host 192.168.0.117 appears to be up.
Nmap done: 256 IP addresses (10 hosts up) scanned in 4.630 seconds

will give this if all are up

For sharing a local printer connected with Ubuntu os in the windows network we need to setup a samba server.For this first install samba in our server linux system.
apt-get install samba
apt-get install samba-common
apt-get install smbclient
apt-get install smbfs

edit the file smb.conf

sudo vim /etc/samba/smb.conf

[printers]
comment = All Printers
browseable = yes
path = /tmp
printable = yes
public = yes
writable = yes
create mode = 0700

# Windows clients look for this share name as a source of downloadable
# printer drivers
[print$]
comment = Printer Drivers
path = /var/lib/samba/printers
browseable = yes
read only = yes
guest ok = yes

To define SAMBA network users for your Ubuntu system, you may use the smbpasswd command.

smbpasswd -a bipin

where “bipin” is a user in the samba server

restart samba

sudo /etc/init.d/samba restart

Enjoy Printing!!!!!!

Networking Configuration of Ubuntu is different from fedora or redhat because there is no “netconfig” command here.So we have to do it in some other way as follows.
Command: sudo vi /etc/network/interfaces

here we will get a page like this

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static
address 192.168.0.33
netmask 255.255.255.0
network 192.168.0.0
broadcast 192.168.0.255
gateway 192.168.0.1
# dns-* options are implemented by the resolvconf package, if installed

replace your own ip configuration here write and quite

issue sudo /etc/init.d/networking restart

Having problem in installing anything in your Ubuntu OS.Take the terminal and issue
the two commands that you can use are:

sudo apt-get install PACKAGE and sudo aptitude install PACKAGE

eg: For installing webserver you have to issue

sudo apt-get install apache2

The sudo part of the command means you temporarily grant super-user/administrator rights to the command, provided you supply a correct user password

It’s also possible to search from the command-line like it is in Synaptic. Try this:

apt-cache search PACKAGE or aptitude search PACKAGE

To find several packages related to what we’re looking for, together with brief descriptions
apt-cache show PACKAGETo uninstall a package:

sudo apt-get remove PACKAGE and sudo aptitude remove PACKAGE

Removing configuration files as well:

sudo apt-get remove –purge PACKAGE and sudo aptitude purge PACKAGE or

sudo dpkg –purge remove PACKAGE

to select and set the time zone.

command: tzconfig

(tzconfig copies the right time zone file from /usr/share/zoneinfo to /etc/localtime and puts the name of the timezone into /etc/timezone)

If your system does not have tzconfig, you may use something else.

tzselect

This will provide a set of different time zones to choose. If you would like to set the time to UTC, choose the option which says something like ‘none of the above’, or ‘none of these’ or something to this effect.

Or you can use

sudo dpkg-reconfigure tzdata