Results for tag administration

  • Digging deeper into AWstats
    Armijn Hemel, 2011-01-21
    AWstats is a popular program to analyze logfiles. The AWstats files themselves are neat little databases from which you can extract a wealth of information.
  • Finding out what hardware is in a box with lshw
    Joor Loohuis, 2011-01-04
    Sometimes you need to know what hardware is in a system, but you don't have specs, or you don't have access to the system. Being able to extract this information directly from the system would then be extremely useful, and this is exactly what lshw does.
  • Adding sequences in phpPgAdmin
    Armijn Hemel, 2010-11-15
    PostgreSQL is a very powerful database engine. A helpful tool for managing PostgreSQL databases is phpPgAdmin. Although it is a good tool some things are a bit quirky.
  • Copying subversion repositories with history using svnsync
    Joor Loohuis, 2010-10-22
    Occasionally it is necessary to make a copy of a subversion repository, while preserving the revision history. Sometimes you need to do this without shell access to the server. In those cases, svnsync may solve your problem.
  • Filtering mail server side with Sieve, part 1
    Armijn Hemel, 2010-08-31
    Like us, you might receive a lot of mail and read it from different locations, using different mail programs, on different kinds of devices, including mobile. If not all mail is relevant at all times, you might want to look at server side filtering instead of client side filtering.
  • Migrating from mbox to maildir
    Armijn Hemel, 2010-05-28
    Two popular formats for storing mail on Unix machines are mbox and maildir. Both have their advantages and disadvantages. Converting from mbox to maildir is easy to do using some Python.
  • Digging through AWstats files
    Armijn Hemel, 2010-05-20
    AWstats is a popular program to analyze logfiles. The AWstats files themselves are neat little databases from which you can extract a wealth of information.
  • Making your servers a bit more "green" with smart system adminstration, part 4: MySQL databases
    Armijn Hemel, 2010-05-16
    "Green IT" can only work if you have a combined approach of optimization on all levels. Knowing how to get the most out of the components you are using is a must.
  • Getting more out of logwatch
    Armijn Hemel, 2010-05-11
    Watching your logs is a must for every administrator, but if there are vast amounts of information at once it can be easy to miss things. Serving the information into tiny bite size pieces makes it easier to spot the right things.
  • Logging unconfigured domain names in Apache
    Joor Loohuis, 2010-04-01
    When using virtual hosting with Apache, occasionally you may have domain names pointing to your webserver that you don't know about yet. A little tweak to the logging format will help you find out what these domain names are.
    Armijn Hemel, 2010-02-04
    IMAP IDLE is a great addition to the IMAP protocol: whenever new mail arrives the server notifies the client and the client does not have to keep polling the server all the time.
  • Quick checks for PHP PEAR and PECL updates
    Armijn Hemel, 2010-01-24
    Ideally all software on a system is installed via one package manager. Reality is a bit different. As an administrator you need to stay on top on updates from all software that is installed instead of relying on the system's package manager.
  • Automated certificate expiration checks on CentOS
    Joor Loohuis, 2009-12-20
    It is essential to keep track of the expiration dates of SSL certificates, and so it's useful to have a periodic check on all certificates in use on a system, that will alert systems administrators when a certificate is about to expire. This article shows one way of setting up such a procedure for CentOS and other RHEL derivatives.
  • One off system backup methods
    Armijn Hemel, 2009-12-01
    Before a new system install it is smart to do a backup of important personal data. There are various methods how you can do this.
  • Fixing permissions in Subversion post-commit hooks
    Armijn Hemel, 2009-10-27
    Subversion is a great version control system and it allows for a lot of tweakability, but a mistake with permissions is easily made...and easily fixed.
  • OpenSSL defaults for certificate generation
    Joor Loohuis, 2009-10-19
    OpenSSL deliberately provides rather useless defaults when certificates are generated. Here's one way of saving yourself some typing when you're frequently confronted with this chore.
  • Learn to speak POP3 in one simple lesson
    Joor Loohuis, 2009-10-06
    POP3 is one of the core protocols of the Internet, allowing mail clients to fetch messages from a remote server. There are circumstances where it is very convenient to be able to perform a manual POP3 session, for example for debugging purposes. This article shows you all you need to know about POP3 to handle such a manual session.
  • DNS names matter
    Armijn Hemel, 2009-09-30
    When naming a local network it matters how you name the network. We found out the hard way.
  • Making your servers a bit more "green" with smart system adminstration, part 3: the right tool for the right job
    Armijn Hemel, 2009-09-26
    "Green IT" can only work if you have a combined approach of optimization on all levels. System administration can play an important role. Even more important is choosing the right programs to solve your problem.
  • Making your servers a bit more "green" with smart system adminstration, part 2: tools
    Armijn Hemel, 2009-08-12
    "Green IT" can only work if you have a combined approach of optimization on all levels. System administration can play an important role. What you need is a good set of tools.
  • Quick and dirty yum checks
    Armijn Hemel, 2009-08-02
    As a system administrator you want to be on top of your systems when it comes to security. You need to know when there are security updates you are interested in, so you can act on them.
  • Making your servers a bit more "green" with smart system adminstration (part 1)
    Armijn Hemel, 2009-07-22
    One of the latest crazes is "Green IT". There are a lot of companies who are marketing their solutions, mostly hardware, which should help you consuming less power while doing business. But there are also a lot of things you can do yourself, which are not difficult at all.
  • The art of autoresponders (part 2)
    Armijn Hemel, 2009-07-17
  • Setting up WebDAV with Apache
    Armijn Hemel, 2009-07-02
    Web based storage with WebDAV can be set up in minutes using the Apache webserver.
  • Ensuring Evolution survives a distro upgrade
    Armijn Hemel, 2009-06-24
    One of the most vital components of the modern desktop is a mail program. A popular mail program on Linux desktops is Evolution. If you upgrade your distribution you want to take special care to ensure that no data is lost.
  • Quick and dirty MySQL optimizations
    Armijn Hemel, 2009-06-18
    Deleted data in a MySQL database often keeps occupying some space (depending on the storage engine), until the database is optimized. With a simple quick and dirty solution you can let cron do this for you.
  • Running top for beer and profit
    Armijn Hemel, 2009-06-09
    Sometimes a small tweak in your system or your thought process can save you heaps and heaps of time, which you can spend otherwise, for more useful things.
  • Potentially problematic feedback between greylisting and spam filtering
    Joor Loohuis, 2009-06-03
    Greylisting may affect the spam score of the message when it eventually is accepted by the mail server, which may have unexpected consequences.
  • "Maybe we should plug the guitars in"
    Armijn Hemel, 2009-05-30
    Sometimes the solution to a big problem can be as small as changing a few jumper settings.
  • Graceful maintenance for Apache virtual hosts
    Joor Loohuis, 2009-05-16
    When disabling individual Apache virtual hosts for maintenance, it is desirable to send search engine friendly 503 headers for any domains configured in this virtual host. Fortunately, this takes very little work.
  • Fighting spam with greylisting
    Armijn Hemel, 2009-05-13
    Spam is one of the number one oline irritations for people. There are some effective ways to get rid of a lot of spam, at least until spammers catch up again. One of the most used methods right now is greylisting, which yields really good results, but at a price.
  • Sysadmin war stories: (disk)size does matter
    Armijn Hemel, 2009-04-26
    When you have a RAID system you need to keep a few things in mind about disk sizes and never use the full disk. Here is why.
  • The art of autoresponders (part 1)
    Armijn Hemel, 2009-04-20
  • Nagios checks for failed RAID disks
    Armijn Hemel, 2009-04-15
  • How to use obscurity to improve security (a tiny bit)
    Armijn Hemel, 2009-04-10
  • Digging to safety with stunnel
    Armijn Hemel, 2009-04-06
  • Sysadmin war stories: when the RAID fails
    Armijn Hemel, 2009-04-04
  • Minimizing Apache httpd downtime with logrotate
    Armijn Hemel, 2009-04-03
  • System administration war stories: BIOS
    Armijn Hemel, 2009-04-02