This page strives to help you, our valued clients get the most from your CentOS Linux communication server. After using various distributions of Linux in the past for our Communications server, our technical team has decided to stick with the Enterprise class of  CentOS.

CentOS ( Community Enterprise Operating System) is built directly from the same source RPMS that make up Redhat Enterprise Linux, thereby ensuring that your system is very stable.

The help laid out in these pages will be specific to our CentOS installations. If you are running an older version of Linux, our Basic Guides page can be found here................ ( Upgrading to CentOS is advised. )
If you don't find an answer to your problems, email us and the solution will be added here.

PLEASE CLICK HERE TO VIEW OUR BASIC LINUX GUIDES

Boot-up problems

1.0 Oops! I have forgotten my root password...
1.1 System appears to have shutdown uncleanly...
1.2 Kernel Panic - try passing INIT=
1.3 Found new Hardware wizard comes up..now what?

Squid Proxy / Internet problems

2.0 My users cannot browse the internet.
2.1 Squid keeps dying
2.2 Access Controls...how??..why??

Sendmail problems

3.0 How do I watch the mail flow?
3.1 Forwarding a users mail
3.2 How to create a simple mailing list?
3.3 Deleting mail from outgoing queue before its delivered
3.4 Forcing mail out the queue
3.5 Temporary  /  Permanent  failures
3.6 My users can receive, but not send
3.7 My users can send, but not receive


User Mailbox problems

4.0 Where are my users mailboxes?
4.1 who is BOGUS...?
4.2 A user has returned from holiday, now cannot receive mail
4.3 Dealing with POP Locks.
4.4 Deleting mail using PINE or MUTT

Dialup problems

5.0 My server is not even trying to dial
5.1 My server dials, handshakes then disconnects
5.2 All I hear is a faint "tick" from my modem
5.3 Howto change the dialup phone number
5.4 There is smoke coming from my modem


Network problems

6.0 Server Connection has been interupted !
6.1 IP Address conflict !
6.2 What is an IP address anyway?
6.3 PING is your friend !

MailScanner Anti-Virus

7.0 How to release Quarantined Mail
7.1 How to Allow or Deny different filetypes
7.2 Link to MailScanners Online Help

Howto Configure a complete Email and Internet Server

8.0 Step 1

Module Specific Howtos

9.0 Auto Responder / Vacation Module
9.1 Mailman Mailing list module

Bandwidth / Over Usage

10.0 My ISP says I have used more than my quota!!!


Running Online Updates

11.0 My system says there are updates to install! What do I do?



A Comprehensive list of Linux Guides can be found here..