Posted by jpluimers on 2021/07/21
On one of my Raspberry Pi boxes, somehow I could not access files over SFTP (SSH File Transfer Protocol) via FileZilla.
I would consistently get this error:
"Connection timed out after 20 seconds of inactivity"
Figuring the exact cause took a while.
TL;DR: SFTP uses an interactive non-login shell, then interprets the output from that shell. For that kind of shell, ensure few or none scripts run that output text.
Posted in *nix, *nix-tools, bash, bash, Communications Development, Conference Topics, Conferences, Development, Event, Internet protocol suite, Power User, Scripting, SFTP, Software Development, SSH, TCP | Leave a Comment »
Posted by jpluimers on 2021/07/20
An image on CORS will follow; likely more on related topics too. [WayBack] 🔎Julia Evans🔍 on Twitter: “some security headers… “ about:
Interesting comments in the thread.
More to follow: [Archive.is] 🔎Julia Evans🔍 on Twitter: “going to talk about CORS headers on a different page because that’s a Whole Thing but i’d love to know what else I left out / got wrong here :)” including these:
Posted in Communications Development, Development, Encryption, HTTP, https, HTTPS/TLS security, Internet protocol suite, Power User, Security, TCP | Leave a Comment »
Posted by jpluimers on 2021/07/19
I hate those updates (this time around FireFox 65) where suddenly the UX changes without an obvious way to switch back to the old behaviour. [WayBack] How do i get the old CTRL + TAB function back? | Firefox Support Forum | Mozilla Support led me to the proper name (“browser.ctrlTab.recentlyUsedOrder”), and a confirmation of the below steps in:
I by now know this is only for new user profiles, but since I do not sync profiles (as almost all of my equipment servers different use cases), but still have the same physical user (me), I want consistent behaviour. See [WayBack/Archive.is] Enable “Ctrl+Tab cycles through tabs in recently used order” feature by default in new profiles
Too bad I could not find a way to script this: my [WayBack] Mozilla Bugzilla “browser.ctrlTab.recentlyUsedOrder” “script” – Google Search turned no useful results.
If you have a scripting workaround, please let me know.
For me, the easiest way is to
about:config,browser.ctrlTab.recentlyUsedOrder,false (actual value; correct).No need for any save button: the change is immediate.
These might help me script it:
Posted in Firefox, Power User, Web Browsers | Leave a Comment »
Posted by jpluimers on 2021/07/19
[WayBack] Mijn pakket raakte kwijt bij het Albert Heijn verzendpunt, wat nu? – Ius Mentis
Interessante discussie bij Tweakers: Lang verhaal in oktober 2017 wat besteld bij bol.com, week later geretourneerd via de AH daarvoor gekozen tijdens het retourproces. Daar een ontvangstbewijs van gekregen. Poos daarna herinnering ontvangen niet betaald, bewijs doorgestuurd niets meer gehoord. Toen opeens in januari van accountor een incassobureau een mail/brief gehad met een vordering. Het… Lees verder
En de links van het artikel:
–jeroen
Posted in LifeHacker, Power User | Leave a Comment »
Posted by jpluimers on 2021/07/19
[WayBack] windows – Is there any sed like utility for cmd.exe? – Stack Overflow
TL;DR: many people suggest to use PowerShell, but there is GNU sed in Chocolatey
The chocolatey part:
Instructions for building [WayBack] Gnu Sed as a native windows application
All patches under the same license as sources of [WayBack] Gnu Sed: [WayBack] GPLv3 or later
sed.exe was exactly the binary [WayBack] sed-windows/sed-4.5-x64.exe at cafe68124fb8f01db3fb1d9ea586f8f6a72d6917 · mbuilov/sed-windows · GitHubThe PowerShell part: read the other answers from the above question.
–jeroen
Posted in *nix, *nix-tools, CommandLine, Power User, PowerShell, RegEx, sed, Windows | Leave a Comment »
Posted by jpluimers on 2021/07/16
This tool can help resetting monitor/display configurations for when your machines gets out of suspend/sleep/shutdown mode and resets the displays to wrong defaults (especially wrong scaling).
Documentation and download: [WayBack] Custom Resolution Utility (CRU)
Custom Resolution Utility (CRU) allows custom resolutions to be defined for both AMD/ATI and NVIDIA GPUs by creating EDID overrides directly in the registry without dealing with .inf files. Download:
Note the requirements:
- Windows Vista or later (Windows XP does not support EDID overrides)
- AMD/ATI or NVIDIA GPU with appropriate driver installed (Microsoft Basic Display Adapter driver does not support EDID overrides)
- Some Intel GPUs and laptops with switchable graphics are supported with one of these drivers:
- 6th/7th generation (Skylake/Kaby Lake): Intel Graphics Driver for Windows [15.45]
- 4th/5th generation (Haswell/Broadwell): Intel Graphics Driver for Windows [15.40]
- 4th generation (Haswell) for Windows 7/8.1: Intel Graphics Driver for Windows 7/8.1 [15.36]
Old version at [WayBack] GitHub – radamar/Custom-Resolution-Utility-ToastyX: Custom Resolution Utility for Windows by ToastyX, duplicated so the source won’t be lost..
Short instructions (but be sure to read the long ones above as well) slightly rephrased for readability:
Posted in Power User, Windows 7, Windows Vista, Windows 8, Windows, Windows 8.1, Windows 10 | Leave a Comment »
Posted by jpluimers on 2021/07/16
Everyone can learn from an outage. CloudFlare shows how to do it right, for instance on the RegEx-going-wild downtime 2 years ago.
So it’s time to link to that one again: [WayBack] Details of the Cloudflare outage on July 2, 2019
More like these at [WayBack] Post Mortem – The Cloudflare Blog.
More on evaluating regular expressions in linear time:
A method for locating specific character strings embedded in character text is described and an implementation of this method in the form of a compiler is discussed. The compiler accepts a regular expression as source language and produces an IBM 7094 program as object language. The object program then accepts the text to be searched as input and produces a signal every time an embedded string in the text matches the given regular expression. Examples, problems, and solutions are also presented.
Programming Techniques: Regular expression search algorithm
Full Text:
Author: Ken Thompson Bell Telphone Labs, Inc., Murray Hill
Published in:
· Magazine Communications of the ACM CACM Homepage archive Volume 11 Issue 6, June 1968
Pages 419-422
ACM New York, NY, USA
table of contents doi>10.1145/363347.363387
is a method of transforming a regular expression into an equivalent nondeterministic finite automaton (NFA)
The algorithm works recursively by splitting an expression into its constituent subexpressions, from which the NFA will be constructed using a set of rules.[3] More precisely, from a regular expression E, the obtained automaton A with the transition function δ respects the following properties:
- A has exactly one initial state q0, which is not accessible from any other state. That is, for any state q and any letter a, {\displaystyle \delta (q,a)} does not contain q0.
- A has exactly one final state qf, which is not co-accessible from any other state. That is, for any letter a, {\displaystyle \delta (q_{f},a)=\emptyset }.
- Let c be the number of concatenation of the regular expression E and let s be the number of symbols apart from parentheses — that is, |, *, a and ε. Then, the number of states of A is 2s − c (linear in the size of E).
- The number of transitions leaving any state is at most two.
- Since an NFA of m states and at most e transitions from each state can match a string of length n in time O(emn), a Thompson NFA can do pattern matching in linear time, assuming a fixed-size alphabet.
Via [WayBack] Details of the Cloudflare outage on July 2, 2019 | Hacker News
–jeroen
Posted in Algorithms, Development, Power User, RegEx, Software Development | Leave a Comment »
Posted by jpluimers on 2021/07/16
At last, somewhere around ESXi 6.7, the built-in BusyBox tool wget started to support the https protocol.
Yay!
Which means that workarounds in these answers are not needed any more:
It was a big BusyBox version bump (from 1.22.x to 1.29.x) between ESXI 6.5 and 6.7, especially since 1.26.x versions (that introduced wget) have been available way before ESXi 6.5 came out: [WayBack] BusyBox.
[root@ESXi-X10SRH-CF:/tmp] wget https://www.example.org wget: not an http or ftp url: https://www.example.org [root@ESXi-X10SRH-CF:/tmp] wget --help BusyBox v1.22.1 (2018-07-23 19:34:04 PDT) multi-call binary. Usage: wget [-csq] [-O FILE] [-Y on/off] [-P DIR] [-U AGENT] URL... Retrieve files via HTTP or FTP -s Spider mode - only check file existence -c Continue retrieval of aborted transfer -q Quiet -P DIR Save to DIR (default .) -O FILE Save to FILE ('-' for stdout) -U STR Use STR for User-Agent header -Y Use proxy ('on' or 'off') [root@ESXi-X10SRH-CF:/tmp] vmware -l VMware ESXi 6.5.0 Update 2
[root@ESXi-X9SRI-3F:/tmp] wget https://www.example.org Connecting to www.example.org (93.184.216.34:443) index.html 100% |******************************************************************************************| 1270 0:00:00 ETA [root@ESXi-X9SRI-3F:/tmp] wget --help BusyBox v1.29.3 (2018-11-02 15:37:50 PDT) multi-call binary. Usage: wget [-c|--continue] [--spider] [-q|--quiet] [-O|--output-document FILE] [--header 'header: value'] [-Y|--proxy on/off] [-P DIR] [-S|--server-response] [-U|--user-agent AGENT] URL... Retrieve files via HTTP or FTP --spider Only check URL existence: $? is 0 if exists -c Continue retrieval of aborted transfer -q Quiet -P DIR Save to DIR (default .) -S Show server response -O FILE Save to FILE ('-' for stdout) -U STR Use STR for User-Agent header -Y on/off Use proxy [root@ESXi-X9SRI-3F:/tmp] vmware -l VMware ESXi 6.7.0 Update 2
–jeroen
Posted in ESXi6.5, ESXi6.7, Power User, Virtualization, VMware, VMware ESXi | Leave a Comment »
Posted by jpluimers on 2021/07/14
You can use:
IF "%~1" == "" GOTO MyLabelto strip the outer set of quotes. In general, this is a more reliable method than using square brackets because it will work even if the variable has spaces in it.
Source: [WayBack] jamesdlin answering on [WayBack] windows – What is the proper way to test if a parameter is empty in a batch file? – Stack Overflow
The tilde (~) strips out double quotes from the command as per
C:\>help for | findstr "~" %~I - expands %I removing any surrounding quotes (") %~fI - expands %I to a fully qualified path name %~dI - expands %I to a drive letter only %~pI - expands %I to a path only %~nI - expands %I to a file name only %~xI - expands %I to a file extension only %~sI - expanded path contains short names only %~aI - expands %I to file attributes of file %~tI - expands %I to date/time of file %~zI - expands %I to size of file %~$PATH:I - searches the directories listed in the PATH %~dpI - expands %I to a drive letter and path only %~nxI - expands %I to a file name and extension only %~fsI - expands %I to a full path name with short names only %~dp$PATH:I - searches the directories listed in the PATH %~ftzaI - expands %I to a DIR like output line values. The %~ syntax is terminated by a valid FOR variable name.
–jeroen
Posted in Batch-Files, Development, Power User, Scripting, Software Development, Windows | Leave a Comment »
Posted by jpluimers on 2021/07/12
For my link archive:
Take advantage of the Microsoft Action Pack subscription to access tools and software that help you run your business and meet the needs of your customers.
All via [WayBack] Microsoft blijft gratis Internal Usage Rights-programma aanbieden na ophef – IT Pro – Nieuws – Tweakers
–jeroen
Posted in Power User, Windows | Leave a Comment »
PDF
The Wiert Corner - irregular stream of stuff 