A git cluster with more then two servers with the approach described in Git repository cluster setup will increase the time you need to push changes to the cluster. This is because of the mirroring back. To solve this a more advanced version of the script is needed to avoid that the mirror-server would try to mirror the changes back to the master-server. Continue reading
Git repository cluster setup – Part 2
Posted in Linux Administration, Version control system
Tagged cluster, git, gitosis, master-master, Replication
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Setup amavisd-new with spamassassin and clamav with postfix
In the here described setup, postfix passes the incoming mails on to amavisd-new. There, the emails get checked for viruses and spam. After the email is checked, it is sent back to postfix for its delivery. Continue reading
Posted in Mailserver
Tagged amavisd, clamav, postfix, Postgrey, Pyzor, SPAM filter, spamassassin
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MySQL Could not find first log file name
When MySQL shows the error “Could not find first log file name in binary log index file” it means that mysql is looking for a bin-log file that is not shown in the bin-log index file. This does not necessary mean the replication is completely broken. Continue reading
Posted in Database
Tagged MySQL, Replication
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Reject individual email address with address extension
With address extension configured in postfix, it is very easy to use new email addresses for every website you register on, but if some website leaks your email, you might receive lots of spam. If the address was an email address configured … Continue reading
Posted in Mailserver
Tagged address extension, postfix
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Keep track of Linux configuration changes with etckeeper
The configuration of a linux server will change over time. Keeping track of the changes of all the configuration files can be a challenge. etckeeper is a utility that makes this easy. With the help of etckeeper, the complete /etc/ directory is placed … Continue reading
Posted in Linux Administration, Version control system
Tagged etc, etckeeper, git
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Setup Dovecot with PAM authentication and SSL on CentOS
Dovecot will act as the IMAP server for this setup. If you need POP3, this can also be provided by dovecot, but in this article I’m just going to show how to setup IMAP with SSL to protect the transfer of emails. Installation … Continue reading
Posted in Mailserver
Tagged CentOS, Dovecot, PAM, SASL Auth
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Restore MySQL replication after error
When you have a replication error that does not allow you to fix it as described in Fix MySQL replication error you need to repair it by restoring the replication completely. Continue reading
Replace hard disk from software RAID
A hard disk is one of those components that will fail at some point in time. To protect against data loss in such a situation you might have already configured a RAID array. Eventually, you’ll have to replace a malfunctioning hard disk, … Continue reading
Posted in Linux Administration
Tagged HDD, Linux, raid, RAID1
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Configure address extension in Postfix
Address extension is one of the features known from GMail but never thought about configuring for your own mail server. I did not think about it for quite some time as i thought it might be complicate to achieve this feature. But I was surprised to see how easy it using postfix. Continue reading
Posted in Mailserver
Tagged address extension, postfix
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Use ssh comfortably with command history and auto-complete
When using ssh on a daily basis you type a lot, given you are probably entering a lot of hostnames and command-line options. But on your local Linux or OS X powered computer you have a lot of powerful tools to make your life easier. I would like to show a couple of easy tricks to make your life easier while working with ssh. Continue reading
Posted in Linux Administration
Tagged auto-complete, command history, SSH
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