THE LINUX/UNIX PAGE!
UNIX administrators are faced with many tasks during normal, day-to-day operations. This site deals with some of the tasks that most UNIX administrators wish had some simple solutions.
High on the list is the capability to automate routine tasks, something that is vital to a system administrator. The life of an admin is a busy one, and if you have to do boring tasks over and over manually, you will burn out fast.
Here you'll find examples (or should we say HACKS) of ways to automate day-to-day issues that can cut the time you spend on them in half. For this reason alone you should always look for ways to automate your environment as much as possible. Make sure you put in plenty of notification routines so that if something does go wrong, you'll be the first to know about it.
UNIX HACKS
One troublesome issue for administrators is system tuning. You need to be careful: you might think you are tuning one thing when, in fact, you might be breaking another. Some of the examples that follow will deal with tuning the system in one way or another. Think before you make the changes, and remember, what might be okay for one system might not be for the other.
For any new computer, collect the information that it contains.
One of the worst things that can happen to even the most experienced UNIX administrators is to open up a trouble ticket with a vendor to replace a disk drive or memory and not have the answer to the simplest of questions: "How big was the drive?" or "What size SIMMs were in the system?". It takes only a second to gather the information when the computer first arrives. Have the information readily available.
Reserve 5-10MB on another disk for vital data. If a second disk isn't available, use a partition other than any of the partitions that the backed up files live on. If all the files being backed up are on the root (/) partition, store the files in the /usr/ partition. Make sure that all the files maintain the same ownership and permissions as the original system files.
There will be times when you'll need to execute programs (such as full backups, batch jobs, filtering of log files, or system utilization) on the last day of the month. At first glance, you might think this is an easy task.
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Below are some of the projects I've done as the *nix System Administrator for some of the companies that I have worked before. Presented from the latest first.
I will try to explain the following in as much detail as possible in order to share to you joy of handling such systems.
SPAMFILTER RELAY SERVER
Part 1: Red Hat Linux Installation
Part 2: Postfix Installation and Configuration
Part 3: Amavis-New, Spamassassin and Razor
Part 4: Installing Maia (SA User Interface)
This is a detailed steps on installing an Email/SMTP server running on RedHat Linux 7.3 with POP server
This is one of the projects accomplised during the NEC-Toppan days. This was a complete replacement of Sendmail v.8 which was the original MTA then. All scripts, aliases (and some new, icluding virtual domains) are all converted for qmail use.
Procedure on the installation can be found here.
APACHE WEB SERVER
BIND
SQUID