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literacy and subtleties for open-source bigots and other weirdos

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Linux tips

In my day job I am managing Debian and Ubuntu systems. However dealing with the operating system is just one part. Even more important is knowing your tools. And there is a hell of a lot of open source software packages available that attempt to make your life easier. But each of them works differently and even if you mastered one tool it will often not help you work with another. Whenever I find something interesting I am trying to write an article about it. May they help broaden your mind, too.

Linux tips 

Updating the BIOS on Lenovo laptops from Linux using a USB flash stick

Aren’t hardware manufacturers funny? They either require an old-fashioned operating system (Windows) or museum hardware (floppy drives) to update a

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Linux tips Thoughts 

Moving contacts and calendar entries from Google to OwnCloud

As an Android user it’s hard to evade Google. You won’t be able to install apps without creating a GMail

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Linux tips 

Docking and undocking Linux laptops with nVidia GPUs using disper

Do you have trouble switching the display when docking and undocking your Linux laptop? In this article I will show

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Linux tips 

Backups with rsnaphot to external USB drives

How long has it been since you last backed up your Linux system? Let me guess – you tried various

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Linux tips 

Renaming multiple files

If you need to rename a larger number of files following a certain pattern then you will long for an

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Linux tips 

Pipes and redirection

Many system administrators seem to have problems with the concepts of pipes and redirection in a shell. A coworker recently

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Linux tips 

NFS: sec=sys or ruin your day

And once again I was bitten by problems on my Debian laptop mounting directories from the file server via NFS.

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Linux tips 

Using tcpdump and Wireshark to sniff and analyse your network traffic

Sometimes a network service is just not behaving the way it should. And the log files do not help you

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Linux tips 

Mounting flash sticks or memory cards on Debian

Usually modern desktop Linux distributions make it easy to automatically mount external storage media like USB flash sticks. But if all

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Linux tips 

Bareos/Bacula Cheat Sheet

Bacula is a nifty backup software that is network-capable and stores data in the database for faster retrieval in case

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Readers’ comments

  • wenston 2021-01-22 at 07:50 on QuotasThe part where postfix checks for quota isn't working. If I check dovecots status using systemctl status dovecot it shows
  • Arnaud 2021-01-21 at 17:04 on Webmail using RoundcubeHi, Can anybody help me ? I must confess that I'm a little bit blocked... Best regards, Arnaud
  • Usa 2021-01-21 at 11:25 on How Squid ACLs workHi, Christoph Haas Can we define more than two ACLs in one line http_access rule? For Example : acl ListIP1
  • OnceAceGuy 2021-01-19 at 07:30 on Setting up Dovecot@harshness - It is not in the tutorial, that is why I added the comment :-) I did a fresh
  • harshness 2021-01-19 at 00:58 on Setting up Dovecot>In dovecot-sql-conf.ext there is a default password scheme parameter as follows: >default_pass_scheme = MD5 Where in the Buster tutorial do
  • boris 2021-01-18 at 18:55 on Testing IMAPI just found out another little piece of my puzzle(dness): I believe that mutt doesn't care for the sub-domain, except
  • boris 2021-01-18 at 18:46 on Testing IMAPHi Christoph and thanks a lot for the extensive tutorial! One thing I don't understand: I connect to mutt with
  • boris 2021-01-18 at 15:44 on Managing users, aliases and domainsThe VALUES have to be set into brackets ( ).
  • OneAceGuy 2021-01-18 at 04:20 on Setting up DovecotGreat tutorial Christoph. I encountered an issue not documented in your guide, found when testing with roundcube. In dovecot-sql-conf.ext there
  • bob 2021-01-17 at 09:45 on Types of email domainsYou say in the (seperately )Virtual Mailbox mappings that "postmaster@example.org" and "abuse@example.org" redirects to "jack@example.com" but in the explanation for
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