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Posted by jpluimers on 2020/09/07
For a simple comma separated list (no quotes), I was expecting a sed script (and indeed it is possible), but tr is more elegant:
Use
trto change , into newlines:
tr , "\n" < list.txt
Source: [WayBack] bash – convert comma separated values into a list of values using shell script – Stack Overflow.
–jeroen
Posted in *nix, *nix-tools, bash, bash, Development, Power User, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2020/08/21
find . -type f -name '\.*' -printMust work if you want list every hidden file down in the directory hierarchy.
This sort of works on Linux, but fails on VMware ESXi (on Linux it only works when applying -maxdepth 1, deeper levels fails because they list all files where the top directory starts with a .):
If you want hidden files and hidden directories, without . and .. :find -regex '\./\..+' -print
This works on both Linux and VMware ESXi:
If you want hidden files and hidden directories, without . and .. :
find . \( -type f -o -type d \) -name '\.*' -print
Based on:
–jeroen
Posted in *nix, *nix-tools, bash, bash, Development, Power User, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2020/08/21
As I need this one day: [WayBack] Tracing a packet journey using Linux tracepoints, perf and eBPF | Yet another enthusiast blog!
Via: [WayBack] Great read about bpf – Kristian Köhntopp – Google+
–jeroen
Posted in Linux, Power User | Leave a Comment »
Posted by jpluimers on 2020/08/17
I think it was Thomas Mueller pointing to this, but I’m not sure as I found it in a browser tab from long ago: [WayBack] Welcome to Dirvish
Dirvish is a fast, disk based, rotating network backup system.
With dirvish you can maintain a set of complete images of your filesystems with unattended creation and expiration. A dirvish backup vault is like a time machine for your data.
Dirvish was originally created by jw schultz .
Before starting, I want to read these:
–jeroen
Posted in *nix, *nix-tools, Power User, rsync | Leave a Comment »
Posted by jpluimers on 2020/08/12
For a project I’m going to be in need to compare version numbers.
I’m not sure yet if I need wildcards, or can leave them out (but for partial semantic versioning, I might need them).
Below a bunch of links that should get me started.
From a quick glance: versioning is hard, comparing even harder.
On versioning in general
Numeric versioning (usually without wildcards):
On semantic versioning (SemVer for short):
in versus CharInSet versus IsDigit versus IsInArrayOn the C# Version class (which handles most of semantic versioning except: leading zero’s, very large numbers, non-numeric release specifiers)
// A Version object contains four hierarchical numeric components: major, minor, // build and revision. Build and revision may be unspecified, which is represented // internally as a -1. By definition, an unspecified component matches anything // (both unspecified and specified), and an unspecified component is "less than" any // specified component.
Interesting idea, but not sustainable: using floating point values to compare versions:
On wildcards:
Via: [WayBack] Anyone tips for a TVersion structure that supports at max quad digits or wildcards and comparison? Like 3.2 matching 3.2.5.7, but not matching 3.3.4.28 ? – Jeroen Wiert Pluimers – Google+
–jeroen
Posted in *nix, *nix-tools, Development, Power User, rpm, Software Development, Versioning | Leave a Comment »
Posted by jpluimers on 2020/08/10
Thomas basically did all the research on the forwarding needed for ELC (formerly Belise/Elise), then showed the PuTTY equivalent to ssh user@remote -L5567:192.168.1.200:5567:
[WayBack] Remote access to the Embarcadero License Center via SSH tunnel – twm’s blog
Via: [WayBack] Once you have set up an Embarcadero License Center (ELC) for your company (with network named user or concurrent licenses) you will need network access … – Thomas Mueller (dummzeuch) – Google+
Related: [WayBack] Introducing the Embarcadero License Center – ELC
–jeroen
Posted in *nix, Communications Development, Delphi, Development, Internet protocol suite, Licensing, Power User, Software Development, SSH, ssh/sshd | Leave a Comment »
Posted by jpluimers on 2020/08/06
Colorblind Web Page Filter
A great tool I found out about a while ago [Archive.is] Toptal Color Blind Filter.
It shows the original web page and the rendering for various types of color blindness:
protan -> Protanopia: red/green color blindness; anomalous red conesdeutan -> Deutanopia: red/green color blindness; anomalous green conestritan -> Tritanopia: blue/yellow color blindness; anomalous blue conesgrey -> Greyscale/achromatopsia: quick check for all forms of colorblindnessBecause of a comment at [WayBack] Forums… https://embarcaderomonitoring.wiert.me/ – JWP – Google+, I used Toptal to notify Uptime robot that their status pages are hard for color blind people: [WayBack] Jeroen Pluimers on Twitter: “Some color blind people indicated to me that @uptimerobot status pages are hard for them to read. Examples are for @EmbarcaderoTech as they have subdomains being offline often: …”, so lets look at how people with various types of color blindness see embarcaderomonitoring.wiert.me :
Posted in *nix, Color (science), Color (software development), Development, Monitoring, Power User, science, Software Development, Uptimerobot, Usability, User Experience (ux), Web Development | Leave a Comment »
Posted by jpluimers on 2020/07/31
… even though you can open and read it fine in an editor: You should check its Linux access permissions. If it is not marked as executable, this might be the cause. Change it with chmod like …
Source for my link archive: [WayBack] If your Samba logon script does not get executed – twm’s blog.
Via: [WayBack] … even though you can open and read it fine in an editor: You should check its Linux access permissions. If it is not marked as executable, this might b… – Thomas Mueller (dummzeuch) – Google+
–jeroen
Posted in *nix, *nix-tools, Power User, samba SMB/CIFS/NMB | Leave a Comment »
Posted by jpluimers on 2020/07/28
From the hindsight department [WayBack] Nice when someone in Dallas using 69.162.119.78 is querying your DNS infrastructure for many permutations of domains… https://gist.github.com/jpluimer… – Jeroen Wiert Pluimers – Google+.
Wolfgang Rupprecht gave me some hints on the cause, as the IP address 69.162.119.78 Google Search used to be of a gaming server: [WayBack] TwotailsTikat’s Profile – Member List – Minecraft Forum
After a good night sleep,
# nslookup 69.162.119.78
78.119.162.69.in-addr.arpa name = mail.uptimerobot.com
In retrospect: perfectly normal behaviour for monitoring machine “snip”.
Log by https://github.com/gamelinux/passivedns
–jeroen
Posted in *nix, DNS, Internet, Monitoring, Power User, Uptimerobot | Leave a Comment »
Posted by jpluimers on 2020/07/27
Somehow Firefox is available on ARM by default, but the crash recovery isn’t that awesome.
On my list of things to try is Chrome or Chromium. These links should help me find out if this is possible at all:
On Firefox crash recovery:
–jeroen
Posted in *nix, Chrome, Google, Linux, openSuSE, Power User, SuSE Linux, Tumbleweed | Leave a Comment »
The Wiert Corner - irregular stream of stuff 