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The default configuration file (/etc/samba/smb.conf) allows users to view their home directories as a Samba share. It also shares all printers configured for the system as Samba shared printers. In other words, you can attach a printer to the system and print to it from the Windows machines on your network.
To configure Samba using a graphical interface, use the Samba Server Configuration Tool. For command line configuration, skip to Section 24.2.2 Command Line Configuration.
The Samba Server Configuration Tool is a graphical interface for managing Samba shares, users, and basic server settings. It modifies the configuration files in the /etc/samba/ directory. Any changes to these files not made using the application are preserved.
To use this application, you must be running the X Window System, have root privileges, and have the redhat-config-samba RPM package installed. To start the Samba Server Configuration Tool from the desktop, go to the Main Menu Button (on the Panel) => System Settings => Server Settings => Samba or type the command redhat-config-samba at a shell prompt (for example, in an XTerm or a GNOME terminal).
The first step in configuring a Samba server is to configure the basic settings for the server and a few security options. After starting the application, select Preferences => Server Settings from the pulldown menu. The Basic tab is displayed as shown in Figure 24-2.
On the Basic tab, specify which workgroup the computer should be in as well as a brief description of the computer. They correspond to the workgroup and server string options in smb.conf.
The Security tab contains the following options:
After clicking OK, the changes are written to the configuration file and the daemon is restart; thus, the changes take effect immediately.
The Samba Server Configuration Tool requires that an existing user account be active on the system acting as the Samba server before a Samba user can be added. The Samba user is associated with the existing user account.
To add a Samba user, select Preferences => Samba Users from the pulldown menu, and click the Add User button. On the Create New Samba User window select a Unix Username from the list of existing users on the local system.
If the user has a different username on a Windows machine and will be logging into the Samba server from the Windows machine, specify that Windows username in the Windows Username field. The Authentication Mode on the Security tab of the Server Settings preferences must be set to User for this option to work.
Also configure a Samba Password for the Samba User and confirm the Samba Password by typing it again. Even if you select to use encrypted passwords for Samba, it is recommended that the Samba passwords for all users are different from their system passwords.
To edit an existing user, select the user from the list, and click Edit User. To delete an existing Samba user, select the user, and click the Delete User button. Deleting a Samba user does not delete the associated system user account.
The users are modified immediately after clicking the OK button.
To add a share, click the Add button. The Basic tab configures the following options:
On the Access tab, select whether to allow only specified users to access the share or whether to allow all Samba users to access the share. If you select to allow access to specific users, select the users from the list of available Samba users.
The share is added immediately after clicking OK.
Samba uses /etc/samba/smb.conf as its configuration file. If you change this configuration file, the changes do not take effect until you restart the Samba daemon with the command service smb restart.
To specify the Windows workgroup and a brief description of the Samba server, edit the following lines in your smb.conf file:
Replace WORKGROUPNAME with the name of the Windows workgroup to which this machine should belong. The BRIEF COMMENT ABOUT SERVER is optional and is used as the Windows comment about the Samba system.
To create a Samba share directory on your Linux system, add the following section to your smb.conf file (after modifying it to reflect your needs and your system):
The above example allows the users tfox and carole to read and write to the directory /home/share, on the Samba server, from a Samba client.
Encrypted passwords are enabled by default because it is more secure. If encrypted passwords are not used, plain text passwords are used, which can be intercepted by someone using a network packet sniffer. It is recommended that encrypted passwords be used.
The Microsoft SMB Protocol originally used plaintext passwords. However, Windows NT 4.0 with Service Pack 3 or higher, Windows 98, Windows 2000, Windows ME, and Windows XP require encrypted Samba passwords. To use Samba between a Linux system and a system running one of these Windows operating systems, you can either edit your Windows registry to use plaintext passwords or configure Samba on your Linux system to use encrypted passwords. If you choose to modify your registry, you must do so for all your Windows machines — this is risky and may cause further conflicts. It is recommended that you use encrypted passwords for better security.
To configure Samba to use encrypted passwords, follow these steps:
The pam_smbpass PAM module can be used to sync users' Samba passwords with their system passwords when the passwd command is used. If a user invokes the passwd command, the password he uses to log in to the Red Hat Enterprise Linux system as well as the password he must provide to connect to a Samba share are changed.
To enable this feature, add the following line to /etc/pam.d/system-auth below the pam_cracklib.so invocation:
On the server that is sharing directories via Samba, the smb service must be running.
View the status of the Samba daemon with the following command:
Start the daemon with the following command:
Stop the daemon with the following command:
To start the smb service at boot time, use the command:
You can also use chkconfig, ntsysv or the Services Configuration Tool to configure which services start at boot time. Refer to Chapter 21 Controlling Access to Services for details.
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