Ubuntu Starter Guide - Chapter 7. Networking

Chapter 7. Networking

Chapter 7. Networking

Table of Contents

Samba Server
AntiVirus Server
SSH Server
DHCP Server
MySQL Database Server
Apache HTTP Server
Streaming Media Server

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7.1. How do I configure network connections?
7.2. How do I activate/deactivate network connections?
7.3. How do I change computer name?
7.4. How do I browse network computers?
7.5. How do I use the DynDNS service?
7.6. How do I use Ethernet over Firewire?

7.1.

How do I configure network connections?

System->Administration->Networking
Select the Connections tab. select the Ethernet connection interface from the list, then click the Properties button. Ensure that the This device is configured is checked. From the Configuration drop-list select DHCP/Static IP address, then click OK.
Select the DNS tab add or delete DNS Servers in the DNS Servers list.

7.2.

How do I activate/deactivate network connections?

System->Administration->Networking
Select Network settings+Connections Tab+Ethernet connection Activate/Deactivate

7.3.

How do I change computer name?

System->Administration->Networking
Select the General tab. Enter the name of the computer in the Hostname field.
Click OK, close all open applications and reboot.

7.4.

How do I browse network computers?


	Assuming that network connections have been configured properly. See How do I configure network connections? for more information.

This screen lists all network servers and Samba servers, if computers, network folders or Sambas servers could not be found, try to access them directly.

Places->Network Servers

7.5.

How do I use the DynDNS service?

Before beginning, ensure that your internet connection has been configured properly.
Read How do I add Universe and Multiverse?
Register free Dynamic DNS at https://www.dyndns.org.
Install the ipcheck package with Synaptic (See How do I use Synaptic to install packages?)

Networking (universe) > ipcheck
```
sudo gedit /root/dyndns_update.sh
```

Insert the following lines into the new file

USERNAME=myusername
PASSWORD=mypassword
HOSTNAME=myhostname.dyndns.org
cd /root/
if [ -f /root/ipcheck.dat ]; then
    ipcheck -r checkip.dyndns.org:8245 $USERNAME $PASSWORD $HOSTNAME
else
    ipcheck --makedat -r checkip.dyndns.org:8245 $USERNAME $PASSWORD $HOSTNAME
fi

Save the edited file

sudo chmod 700 /root/dyndns_update.sh 
sudo sh /root/dyndns_update.sh 
export EDITOR=gedit && sudo crontab -e

Append the following line at the end of file to refresh your IP in the DynDNS Database/DNS every hour. The ***** format equals minute, hour, date, month and year respectively.
```
00 * * * * sudo sh /root/dyndns_update.sh
```
Save the edited file

7.6.

How do I use Ethernet over Firewire?


	Enabling Ethernet over Firewire involves recompiling your kernel, which can seriously break your system. For more information, see https://wiki.ubuntu.com/KernelCompileHowto.

You need to compile a kernel including the following (NOT as modules):

ieee1394

ohci1394

eth1394
Reboot your PC
Your firewire ethernet connection should be listed under System-> Administration-> Networking, or you can use ifconfig to list your network devices
See https://wiki.ubuntu.com/EthernetOverFirewire for more information.

Samba Server

1. What is Samba?
2. How do I install Samba?
3. How do I add/edit/delete network users when using authentication?
4. How do I share home folders with read only permission?
5. How do I share home folders with read/write permission?
6. How do I share a group folder with read only permission?
7. How do I share a group folder with read/write permission?
8. How do I share public folders with read only permission?
9. How do I share public folders with read/write permission?

1.	What is Samba?
	Samba is a networking tool that enables Linux to participate in Windows networks. There are two parts to Samba, one being the server which shares out files and printers for other PC's to use, and the other being the client utilities, which allow Linux to access files and printers on other Windows/Samba PCs.
2.	How do I install Samba?
	Read How do I add Universe and Multiverse? Install the samba and smbfs packages with Synaptic (See How do I use Synaptic to install packages?) Networking > samba Cross Platform > smbfs
3.	How do I add/edit/delete network users when using authentication?
	Read How do I install Samba? To add network user Read How do I add/edit/delete users? smbpasswd -a system_username sudo gedit /etc/samba/smbusers Insert the following line into the new file system_username = "network username" Save the edited file (sample/smbusers_addeditdeletenetworkusers) To edit network user sudo smbpasswd -a system_username To delete network user sudo smbpasswd -x system_username
4.	How do I share home folders with read only permission?
	Read How do I install Samba? sudo cp /etc/samba/smb.conf /etc/samba/smb.conf_backup sudo gedit /etc/samba/smb.conf Find this line ... ; security = user ... Replace with the following lines security = user username map = /etc/samba/smbusers Alternatively replace with the following line to skip authentication security = share Save the edited file ( sample/smb.conf_sharehomefoldersreadsecurityuser) If using authentication read How do I add/edit/delete network users when using authentication? sudo testparm sudo /etc/init.d/samba restart
5.	How do I share home folders with read/write permission?
	Read How do I install Samba? sudo cp /etc/samba/smb.conf /etc/samba/smb.conf_backup sudo gedit /etc/samba/smb.conf Find this line ... ; security = user ... Replace with the following lines security = user username map = /etc/samba/smbusers Alternatively replace with the following line to skip authentication security = share Find this section ... # By default, the home directories are exported read-only. Change next # parameter to 'yes' if you want to be able to write to them. writable = no ... Replace with the following lines # By default, the home directories are exported read-only. Change next # parameter to 'yes' if you want to be able to write to them. writable = yes Save the edited file (sample/smb.conf_sharehomefoldersreadwritesecurityuser) If using authentication read How do I add/edit/delete network users when using authentication? sudo testparm sudo /etc/init.d/samba restart
6.	How do I share a group folder with read only permission?
	Read How do I install Samba? sudo mkdir /home/group sudo chmod 777 /home/group/ sudo cp /etc/samba/smb.conf /etc/samba/smb.conf_backup sudo gedit /etc/samba/smb.conf Find this line ... ; security = user ... Replace with the following lines security = user username map = /etc/samba/smbusers Alternatively replace with the following line to skip authentication security = share Append the following lines at the end of file [Group] comment = Group Folder path = /home/group public = yes writable = no valid users = system_username1 system_username2 create mask = 0700 directory mask = 0700 force user = nobody force group = nogroup Save the edited file ( sample/smb.conf_sharegroupfoldersreadsecurityuser) If using authentication read How do I add/edit/delete network users when using authentication? sudo testparm sudo /etc/init.d/samba restart
7.	How do I share a group folder with read/write permission?
	Read How do I install Samba? sudo mkdir /home/group sudo chmod 777 /home/group/ sudo cp /etc/samba/smb.conf /etc/samba/smb.conf_backup sudo gedit /etc/samba/smb.conf Find this line ... ; security = user ... Replace with the following lines security = user username map = /etc/samba/smbusers Alternatively replace with the following line to skip authentication security = share Append the following lines at the end of file [Group] comment = Group Folder path = /home/group public = yes writable = yes valid users = system_username1 system_username2 create mask = 0700 directory mask = 0700 force user = nobody force group = nogroup Save the edited file (sample/smb.conf_sharegroupfoldersreadwritesecurityuser) If using authentication read How do I add/edit/delete network users when using authentication? sudo testparm sudo /etc/init.d/samba restart
8.	How do I share public folders with read only permission?
	Read How do I install Samba? sudo mkdir /home/public sudo chmod 777 /home/public/ sudo cp /etc/samba/smb.conf /etc/samba/smb.conf_backup sudo gedit /etc/samba/smb.conf Find this line ... ; security = user ... Replace with the following lines security = user username map = /etc/samba/smbusers Alternatively replace with the following line to skip authentication security = share Append the following lines at the end of file [public] comment = Public Folder path = /home/public public = yes writable = no create mask = 0777 directory mask = 0777 force user = nobody force group = nogroup Save the edited file (sample/smb.conf_sharepublicfoldersreadsecurityuser) If using authentication read How do I add/edit/delete network users when using authentication? sudo testparm sudo /etc/init.d/samba restart
9.	How do I share public folders with read/write permission?
	Read How do I install Samba? sudo mkdir /home/public sudo chmod 777 /home/public/ sudo cp /etc/samba/smb.conf /etc/samba/smb.conf_backup sudo gedit /etc/samba/smb.conf Find this line security = user Replace with the following lines to use authentication security = user username map = /etc/samba/smbusers Alternatively replace with the following line to skip authentication security = share Append the following lines at the end of file [public] comment = Public Folder path = /home/public public = yes writable = yes create mask = 0777 directory mask = 0777 force user = nobody force group = nogroup Save the edited file (sample/smb.conf_sharepublicfoldersreadwritesecurityuser) If using authentication read How do I add/edit/delete network users when using authentication? sudo testparm sudo /etc/init.d/samba restart


Chapter 6. Users Administration		AntiVirus Server