Articles by Falko Timme
About Falko Timme
Falko Timme is an experienced Linux administrator and founder of Timme Hosting, a leading nginx business hosting company in Germany. He is one of the most active authors on HowtoForge since 2005 and one of the core developers of ISPConfig since 2000. He has also contributed to the O'Reilly book "Linux System Administration".
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How To Migrate Mailboxes Between IMAP Servers With imapsync
Author: Falko Timme • Tags: email • Comments: 30 • Updated: Sep 13, 2019How To Migrate Mailboxes Between IMAP Servers With imapsync- This guide explains how you can migrate mailboxes between IMAP servers with imapsync. imapsync is an IMAP synchronisation, sync, copy or migration tool. More than 32 different IMAP server softwares are supported with success. All flags are preserved, unread will stay unread, read will stay read, deleted will stay deleted.
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Postfix - virtual_mailbox_limit is smaller than message_size_limit
Author: Falko Timme • Tags: errors • Comments: 1 • Updated: Aug 05, 2019Error: Postfix - virtual_mailbox_limit is smaller than message_size_limit You get the following error in your mail log: Jul 13 17:12:30 mail postfix/virtual[10486]: fatal: main.cf configuration error: virtual_mailbox_limit is smaller than message_size_limit
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How can I find out which Postfix version I'm running?
Author: Falko Timme • Tags: postfix • Comments: 5 • Updated: Jul 01, 2019This short tutorial will show you how to get the version number of the Postfix email server.
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Linux screen Command: Keep Processes Running Despite a Dropped Connection
Author: Falko Timme • Tags: linux, other • Comments: 17 • Updated: Mar 28, 2019Linux screen Command: Keep Your Processes Running Despite A Dropped Connection I guess you all know this: you are connected to your server with SSH and in the middle of compiling some software (e.g. a new kernel) or doing some other task which takes lots of time, and suddenly your connection drops for some reason, and you lose your labour.
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How to Repair MySQL Replication
Author: Falko Timme • Tags: mysql • Comments: 25 • Updated: Mar 20, 2019If you have set up MySQL replication, you probably know this problem: sometimes there are invalid MySQL queries which cause the replication to not work anymore. In this short guide, I explain how you can repair the replication on the MySQL slave without the need to set it up from scratch again.
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Mirror Your Web Site With rsync
Author: Falko Timme •
Tags: backup, debian, linux, ubuntu •
Comments: 43 •
Updated: Aug 06, 2018 This tutorial shows how you can mirror your web site from your main web server to a backup server that can take over if the main server fails. We use the tool rsync for this, and we make it run through a cron job that checks every x minutes if there is something to update on the mirror. Thus your backup server should usually be up to date if it has to take over.
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Checking Package Dependencies with apt-rdepends on Debian and Ubuntu
Author: Falko Timme •
Tags: debian, shell, ubuntu •
Comments: 1 •
Updated: Apr 10, 2018 This guide shows how you can check the dependencies of a package with the tool apt-rdepends on Debian and Ubuntu systems. The great thing about apt-rdepends is that it resolves dependencies recursively, i.e., not only does it show the direct dependencies of a package, but also the dependencies' dependencies. This is great, for example, if you want to rebuild a package from the sources, etc.
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How to Benchmark Your System (CPU, File IO, MySQL) with Sysbench
Author: Falko Timme •
Tags: linux •
Comments: 14 •
Updated: Mar 29, 2018 How to benchmark your system (CPU, File IO, MySQL) with sysbench. Sysbench is a benchmark suite which allows you to quickly get an impression about system performance which is important if you plan to run a database under intensive load. This article explains how to benchmark your CPU, file IO, and MySQL performance with sysbench.
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Setting Up Postfix As A Backup MX
Author: Falko Timme •
Tags: email, postfix •
Comments: 11 •
Updated: Mar 26, 2018 Setting Up Postfix As A Backup MX. In this tutorial, I will show how you can set up a Postfix mail server as a backup mail exchanger for a domain so that it accepts mails for this domain in case the primary mail exchanger is down or unreachable and passes the mails on to the primary MX once that one is up again.
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How do I edit files on the command line?
Author: Falko Timme •
Tags: other, shell •
Comments: 5 •
Updated: Feb 02, 2018 To edit files on the command line, you can use an editor such as vi. To open the file, run vi /path/to/file Now you see the contents of the file (if there is any. Please note that the file is created if it does not exist yet.). The most important commands in vi are these: Press i to enter the Insert mode. Now you can type in your text. To leave the Insert mode press ESC.
