The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

  • My badges

    Mastodon

  • Twitter Updates

  • My Flickr Stream

    20140508-Delphi-2007--Project-Options--Cannot-Edit-Application-Title-HelpFile-Icon-Theming20140430-Fiddler-Filter-Actions-Button-Run-Filterset-now20140424-VMware-Fusion-6.0.3.-no-reclaimable
    More Photos

  • Pages

  • All categories

  • Enter your email address to subscribe to this blog and receive notifications of new posts by email.

    Join 1,835 other subscribers

{Updated} Linux server security checklist. #sysadmin 

Posted by jpluimers on 2019/03/11

Most tips are OK, but:

  1. for password related policies, please read these:
  2. If you do DNS, implement DNSSEC
  3. I think ipv6 is OK, but like ipv4 needs to be firewalled
  4. Be really careful with fail2ban and similar tools: they are easy ways to lock yourself out as well, for instance by someone doing a nice (D)DoS on you.

Tips: [WayBack] 40 Linux Server Hardening Security Tips [2017 edition] – nixCraft

Via:

–jeroen

Posted in *nix, *nix-tools, Encryption, Let's Encrypt (letsencrypt/certbot), Power User, Security | Leave a Comment »

PS/2 port colours – Wikipedia

Posted by jpluimers on 2019/03/11

I always forget which colours the [WayBack] PS/2 port for keyboard and mouse have.

Some of my old (some call it classic or vintage) mice and keyboards don’t even have a coloured plug.

Luckily, Wikipedia has the answer File:Ps-2-ports.jpg – Wikipedia :

Color Description
Purple Keyboard
Green Mouse

–jeroen

 

Posted in History, Keyboards and Keyboard Shortcuts, Power User | Leave a Comment »

sorting – Is there a Windows equivalent to the Unix uniq? – Super User

Posted by jpluimers on 2019/03/08

TL;DR:

  • Windows 10 has an undocumented /unique switch for sort
  • git for Windows ships with uniq (in a default x64 install, it is at C:\Program Files\Git\usr\bin\uniq.exe)

From [WayBack] sorting – Is there a Windows equivalent to the Unix uniq? – Super User

This works fine:

dir /s /b *0*.pas *1*.pas *2*.pas *3*.pas *4*.pas *5*.pas *6*.pas *7*.pas*8*.pas *9*.pas | sort /unique > pas-files-with-numeric-names.txt

I need remove duplicate lines from a text file, it is simple in Linux usingcat file.txt |sort | uniqwhen file.txt containsaaabbbaaacccIt will output aaabbbcccIs there a Windows

 

Posted in Development, Power User, Software Development, Windows, Windows Development | Leave a Comment »

sudo command doesn’t source /root/.bashrc – Unix & Linux Stack Exchange

Posted by jpluimers on 2019/03/08

TL;DR:

  • sudo -i is not an interactive logon to root
  • sudo -i bash is interactive and *does* execute /root/.bashrc

Source: [WayBack] sudo command doesn’t source /root/.bashrc – Unix & Linux Stack Exchange

–jeroen

Posted in *nix, *nix-tools, bash, Power User | Leave a Comment »

Reminder tip: Disable Wi-Fi during sleep to dramatically increase idle battery life on tablets and devices you don’t often use

Posted by jpluimers on 2019/03/08

I agree: [WayBack] It’s so obvious I hadn’t thought about this.. – Roderick Gadellaa – Google+.

[WayBack] Reminder tip: Disable Wi-Fi during sleep to dramatically increase idle battery life on tablets and devices you don’t often use

–jeroen

Posted in Android Devices, LifeHacker, Power User | Leave a Comment »

detect availability of node-set() function in xslt implementation of icecast server – Stack Overflow

Posted by jpluimers on 2019/03/07

Wow, I totally forgot I had done this xslt trick eons ago: [WayBack] detect availability of node-set() function in xslt implementation of icecast server – Stack Overflow

–jeroen

Posted in Development, Software Development, XML/XSD, XSLT | Leave a Comment »

How can I rename a git stash? – Stack Overflow

Posted by jpluimers on 2019/03/07

SourceTree does not like it when by accident two git stash entries have exactly the same name.

To work around that, you have to rename one.

The easiest way to do this is on the console using the tips from [WayBack] How can I rename a git stash? – Stack Overflow (thanks [WayBack] qzb):

$ git stash list
stash@{0}: WIP on master: Add some very important feature
stash@{1}: WIP on master: Fix some silly bug

First, you must remove stash entry which you want to rename:

$ git stash drop stash@{1}
Dropped stash@{1} (af8fdeee49a03d1b4609f294635e7f0d622e03db)

Now just add it again with new message using sha of commit returned after dropping:

$ git stash store -m "Very descriptive message" af8fdeee49a03d1b4609f294635e7f0d622e03db

And that’s it:

$ git stash list
stash@{0}: Very descriptive message
stash@{1}: WIP on master: Add some very important feature

This solution requires git 1.8.4 or later, and yes, it works with dirty working directory too.

Some other useful git stash commands:

–jeroen

Posted in Development, DVCS - Distributed Version Control, git, Software Development, Source Code Management, SourceTree | Leave a Comment »

Atom, plantuml-preview, homebrew and messages about plantuml being too old

Posted by jpluimers on 2019/03/07

If you get a message like this in Atom when using plantuml-preview:

then you need to change the PlantUML Jar setting from your old version (in my case /usr/local/Cellar/plantuml/1.2017.13/libexec/plantuml.jar:

Then you have to save your .plantuml file so the preview re-renders.

This finds the homebrew installed PlantUML versions:

$ find /usr/local/Cellar/plantuml | grep plantuml.jar
/usr/local/Cellar/plantuml/1.2017.13/libexec/plantuml.jar
/usr/local/Cellar/plantuml/1.2017.14/libexec/plantuml.jar

–jeroen

Posted in Development, Diagram, PlantUML, Software Development, UML | Leave a Comment »

Smart Pointers code that compiles in FPC and Delphi

Posted by jpluimers on 2019/03/06

Delphi and FPC have different language boundaries, so it is always good to read a thread discussing how to get near-the-edge cases work in both.

This case is about Smart Pointers (here called auto pointers, maybe because auto_ptr is what they used to be called in C++): [WayBack] Hi all, I am trying to make a certain piece of code cross compile between Delphi and FPC. On FPC, it compiles fine but on Delphi I get a [dcc32 Error] P… – Ugochukwu Mmaduekwe – Google+

In the end if comes down to that Delphi does not allow forward-declaration of records (it does for interfaces and classes), but that you do not need a __PAutoPtr_T = ^__TAutoPtr_T, because you can use ^__TAutoPtr_T in parameters.

In Spring4D, they are called Shared/IShared/TShared, see my comment:

Note that since these are reference counted, you might want to call them shared_ptr. If you enforce the single-instance behaviour, observe that in C++ they are now called uniqe_ptr.

In Spring4D this rename has already taken place a while ago: https://bitbucket.org/sglienke/spring4d/commits/e252b81fd3788cf5b82588721f68d00c892deb87

–jeroen

Posted in Conference Topics, Conferences, Delphi, Development, Event, Software Development | 2 Comments »

Installing Let’s Encrypt Free SSL/TLS Certificate in 2 Minutes with Certbot, Spending Hours Making it Work with Cloudflare

Posted by jpluimers on 2019/03/06

If I ever need to get LetsEncrypt to work with CloudFlare, then I need to read [WayBack] Installing Let’s Encrypt Free SSL/TLS Certificate in 2 Minutes with Certbot, Spending Hours Making it Work with Cloudflare

The steps there should save me hours.

Via [WayBcack] Free Let’s Encrypt SSL/TLS certificates are even easier to install than self-signed certificates. I could do so in 2 minutes in my +Linode … – Jean-Luc Aufranc – Google+.

–jeroen

Posted in Encryption, Let's Encrypt (letsencrypt/certbot), Power User, Security | Leave a Comment »

« Previous Entries
Next Entries »