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

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Archive for January 29th, 2019

Need to revisit: Grep search crashes with `Invalid class typecast.` · Issue #1 · jpluimers/GExperts · GitHub

Posted by jpluimers on 2019/01/29

One day I need to resivit [WayBackGrep search crashes with Invalid class typecast. · Issue #1 · jpluimers/GExperts · GitHub.

The reason is that I want to be able to:

  • bind shortcut keys for deleting entries in the list of grep searches
  • performing a search while watching the results of a different one

Via [WayBack] Small initial fix for a race condition https://github.com/jpluimers/GExperts/issues/1 in commit https://github.com/jpluimers/GExperts/commit/bcc365911ab… – Jeroen Wiert Pluimers – Google+

–jeroen

Posted in Delphi, Development, GExperts, Software Development | Leave a Comment »

linux – Test if a port on a remote system is reachable (without telnet) – Super User

Posted by jpluimers on 2019/01/29

Just learned that bash can do TCP and UDP itself:

Bash has been able to access TCP and UDP ports for a while. From the man page:

/dev/tcp/host/port
    If host is a valid hostname or Internet address, and port is an integer port number
    or service name, bash attempts to open a TCP connection to the corresponding socket.
/dev/udp/host/port
    If host is a valid hostname or Internet address, and port is an integer port number
    or service name, bash attempts to open a UDP connection to the corresponding socket.

So you could use something like this:

xenon-lornix:~> cat < /dev/tcp/127.0.0.1/22
SSH-2.0-OpenSSH_6.2p2 Debian-6
^C pressed here

Taa Daa!

This for systems that do not have telnet installed (Windows stopped using this a long time ago, many Linux distributions followed suit) and you cannot to use nc (also known as netcat).

–jeroen: [WayBacklinux – Test if a port on a remote system is reachable (without telnet) – Super User

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

Twitter so: Testing in Production – The Isoblog.

Posted by jpluimers on 2019/01/29

From 2017, a still relevant edited twitter conversation on testing in production, why you need it: [WayBackTwitter so: Testing in Production – The Isoblog.

–jeroen

Posted in Development, Testing | Leave a Comment »

docs.embarcadero.com unreachable – via Docs – EmbarcaderoMonitoring

Posted by jpluimers on 2019/01/29

One reason to monitor your infrastructure is to signal longer outages, or even better review past outages and prevent longer ones.

It is not the reason I created [Archive.is] EmbarcaderoMonitoring (it was to rule out problems between my systems and the Embarcadero sites), but it does help me gain insight in their infrastructure.

In this case, the [Archive.is] Docs – EmbarcaderoMonitoring shows that after months of OK operation, it suddenly started failing, at the same day parts of the other infrastructure also failed. It recovered, just like the other parts, but unlike the other parts, it was now down for almost a day when I took the screenshots:

Hopefully someone at Embarcadero realises the downtime too.

Read the rest of this entry »

Posted in Delphi, Development, Software Development | Leave a Comment »

 
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