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 Compile A Kernel - The Debian Way
Author: Falko Timme • Tags: debian, kernel • Comments: 4 • Updated: Mar 29, 2021How to Compile A Kernel on Debian Linux. Each distribution has some specific tools to build a custom kernel from the sources. This article is about compiling a kernel on a Debian Linux system. It describes how to build a custom kernel using the latest unmodified kernel sources from www.kernel.org (vanilla kernel).
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FreeBSD Quota Tutorial
Author: Falko Timme • Tags: freebsd • Comments: 3 • Updated: Mar 28, 2021This tutorial shows you how to enable hard disk quota on a FreeBSD system.
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How to Configure Custom Postfix Bounce Messages
Author: Falko Timme • Tags: postfix • Comments: 6 • Updated: Jan 25, 2021Since Postfix version 2.3, Postfix supports custom bounce messages. This guide shows how to configure custom Postfix bounce messages and max queue lifetime.
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How do I edit files on the command line?
Author: Falko Timme • Tags: other, shell • Comments: 8 • Updated: May 15, 2020To 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.
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How to Securely Destroy/Wipe Data on Hard Drives with shred on Linux
Author: Falko Timme • Tags: linux, security • Comments: 19 • Updated: May 08, 2020Sometimes you need to destroy or wipe data from hard drives (for example, before you sell your old hard drives on eBay) so that nobody else can access them. Simply deleting data (e.g. with rm) is not enough because that just removes the file system pointer, but not the data, so it can easily be undeleted with recovery software. Even zero'ing out your hard drive might not be enough. Here's where shred comes into play - shred can overwrite the files and partitions repeatedly, in order to make it harder for even very expensive hardware probing to recover the data.
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Using Wget with FTP to Download/Move Web Sites Recursively
Author: Falko Timme • Tags: linux • Comments: 0Sometimes you need to move a web site from one server to another. Instead of downloading the web site from the old server to your PC via FTP and uploading it from your PC to the new server, it would save a lot of time to simply copy the web site from one server to the other. This tutorial explains how to use Wget to download/move a web site from one server to the other via FTP.
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How To Migrate Mailboxes Between IMAP Servers With imapsync
Author: Falko Timme • Tags: email • Comments: 31How 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: 1Error: 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: 5This 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: 17Linux 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.
