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 1,839 other subscribers

Archive for the ‘*nix-tools’ Category

« Previous Entries
Next Entries »

20 Cool Command Line Tricks for Windows and macOS

Posted by jpluimers on 2019/11/08

After all these years in the field, I still learned new tricks from [WayBack] 20 Cool Command Line Tricks for Windows and macOS which I have rephrased:

Windows

1) View installed drivers: [WayBack] driverquery

2) Watch Star Wars in ASCII: [WayBack] telnet towel.blinkenlights.nl

…

3) Save folder trees to disk: tree (I had totally forgotten about this, probably because it leaves out a lot of directories and files)

…

5) Show your Wi-Fi password [WayBack] netsh wlan show profile SSID key=clear (replace SSID with your network name; use nets wlan show profile to view the network names)

…

7) Check your laptop’s battery health: [WayBack] powercfg /batteryreport which will be in ” and hit Enter to generate the report, then %HOMEPATH%\battery-report.html

8) View your Windows license key: wmic path softwarelicensingservice get OA3xOriginalProductKey [WayBack]

…

Mac OS X / macOS / however it is called now

1) Change the default screenshot type: [WayBack] defaults write com.apple.screencapture type JPG (you can also use JP2 (for JPEG2000), PDF, PNG, TIFF and others)

2) Get your Mac to speak to you: use say

3) Add a message to the login screen: sudo defaults write /Library/Preferences/com.apple.loginwindow LoginwindowText "your new text on the logon window" [WayBack]

4) Play Tetris and other classics: start emacs, then press Esc followed by X, type in tetris, pong, snake or solitaire (to exit emacs, press Ctrl–X followed by Ctrl–C). There are [WayBack] more emacs games.

5) Get a dictionary definition: run curl dict://dict.org/d:word (where word is what you are after) which uses the [WayBack] dict protocol

6) Keep macOS awake: [WayBack] caffeinate optionally followed by a -t## parameter where ## is the number of seconds to not sleep.

7) Show hidden files: defaults write com.apple.finder AppleShowAllFiles -bool TRUE; killall Finder or use this AppleShowAllFiles script which I had forgotten about writing in the first place.

…

10) Add Spaces to the Dock: defaults write com.apple.dock persistent-apps -array-add ‘{”tile-type”=”spacer-tile”;}’; killall Dock running the command as many times as you want spaces. To get rid of a space you’ve added, just drag them to the Trash.

–jeroen

via: [WayBack] 20 Cool Command Line Tricks for Windows and macOS http://flip.it/SvcQlu – Joe C. Hecht – Google+

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

OpenSuSE: the relation between /etc/var/named.d and /var/lib/named

Posted by jpluimers on 2019/10/24

For first time BIND named users on OpenSuSE there is often confusion on the relation between these directories:

  • /etc/named.d/
  • /var/lib/named/

For example here someone else struggled: [WayBack] Re: Fwd: Re: [opensuse] Split DNS? Solved

This is how I inferred the workings:

The /etc/named.conf.include is re-generated at named start by running /usr/share/bind/createNamedConfInclude by including files that both match NAMED_CONF_INCLUDE_FILES in /etc/sysconfig/named and exist in the /etc/named.d/ directory.

At named startup, it also copies everything from /etc/named.d to /var/lib/named/etc/named.d

For details see

–jeroen

Posted in *nix, *nix-tools, bind-named, Linux, openSuSE, Power User, SuSE Linux | Leave a Comment »

Linux command shows a list of all subdirectories that contain a least one .xml file – Thomas Mueller

Posted by jpluimers on 2019/09/09

Via [WayBack] So I don’t forget: The following Linux command shows a list of all subdirectories that contain a least one .xml file… – Thomas Mueller (dummzeuch) – Google+:

[WayBack]Find all subdirectories containing xml files on Linux command line

find . -type f -name '*.xml' | sed -r 's|/[^/]+$||' | sort | uniq

The sed bit is explained in [WayBack] Get list of subdirectories which contain a file matching a string:

The sed command consists of a single substitute. It looks for matches to the regular expression /[^/]+$ and replaces anything matching that with nothing. The dollar sign means the end of the line. [^/]+' means one or more characters that are not slashes. Thus, /[^/]+$ means all characters from the final slash to the end of the line. In other words, this matches the file name at the end of the full path. Thus, the sed command removes the file name, leaving unchanged the name of directory that the file was in.

–jeroen

Posted in *nix, *nix-tools, Power User, sed, sort, uniq | Leave a Comment »

How to Update All Your Ruby Gems At Once | Life, the Universe, and Everything

Posted by jpluimers on 2019/08/26

This looks smart

gem update `gem list | cut -d ' ' -f 1`

From: [WayBack] How to Update All Your Ruby Gems At Once | Life, the Universe, and Everything

Though on the bash prompt, it works fine on Mac OS X / OS X / macOS / …, it does not work nice as an alias.

You can get it to work with difficult escaping (or nesting).

But it is easier to escape this:

gem update $(gem list | cut -d ' ' -f 1)

Escaped, it comes down to:

alias "gem-update-all=gem update \$(gem list | cut -d ' ' -f 1)"

Based on:

–jeroen

Posted in Apple, bash, bash, Development, Mac OS X / OS X / MacOS, Power User, Scripting, Software Development | Leave a Comment »

Some Markdown links on phrasing more difficult markdown for correct rendering

Posted by jpluimers on 2019/08/20

After blogging on Markdown notes in 2014, Markdown support has come a long way. It also means that the documents written in Markdown has become more complex, and that more tools can render it.

Given the vague aspects of many Markdown dialects, rendering can be troublesome (see my post Babelmark 2 online Markdown checker), so below are some links on some aspects I had trouble with getting right.

Note that there are two markdown linters:

Sometimes, issues are present in one, but not in the other; see:

The command line interface to the Ruby version is easier to install than the JavaScript version as everything is in one gem: mdl, unlike the npm, where the cli is in markdown-cli and the library in markdownlint.

–jeroen

Related:

Read the rest of this entry »

Posted in *nix, *nix-tools, Development, Lightweight markup language, MarkDown, pandoc document converter, Power User, Ruby, Software Development | Leave a Comment »

… compare two JSON structures and pin-point … the differences – – Nicholas Ring – Google+

Posted by jpluimers on 2019/08/20

I’ve added a few WayBack/Archive.is links to the interesting comments by Zoë Peterson from Scooter Software (of Beyond Compare fame) at [WayBack] … compare two JSON structures and pin-point … the differences – – Nicholas Ring – Google+:

Beyond Compare 4 has an optional “JSON sorted” file format that uses jq to pretty print and sort JSON data before comparing it. It’s not included out of the box yet, but you can get a copy here:

If you’re interested in an actual algorithm and not just an app, I don’t have a suggestion handy, but could dig one up. Tree alignment is more complicated than sequence alignment and we did do research into it, but it was quite a few years ago and didn’t get incorporated into BC. XML alignment algorithms were being actively researched back in the aughts and they should trivially transfer to JSON.
…

It looks like our research mostly ended around 2002, and I wasn’t personally involved in it, so I don’t know how helpful this will be, but here’s what I have:

The general idea in the thread is that JSON – though not as formalised as XML – does have structure, so if you can normalise it, then XML ways of differencing should work.

Normalisation also means that you need to normalise any floating point, date time, escaping, quoting, etc. Maybe not for the faint of heart.

–jeroen

Posted in *nix, *nix-tools, Beyond Compare, Development, diff, JavaScript/ECMAScript, jq, JSON, Power User, Scripting, Software Development, XML, XML/XSD | Leave a Comment »

sebastien/sink: Swiss army knife for directory comparison and synchronization

Posted by jpluimers on 2019/08/02

If you don’t have Beyond Compare available for your platform (or cannot connect via Beyond Compare to it): sebastien/sink: Swiss army knife for directory comparison and synchronization.

The Python script in it does 3-way directory compares on the console.

It is very similar to the Beyond Compare “folder merge” functionality.

–jeroen

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

Convert cURL command syntax to Python requests, Node.js code

Posted by jpluimers on 2019/07/26

Utility for converting curl commands to code

For my link archive: [WayBack] Convert cURL command syntax to Python requests, Node.js code

–jeroen

Posted in *nix, *nix-tools, cURL, Development, JavaScript/ECMAScript, Node.js, Power User, Python, Scripting, Software Development | Leave a Comment »

Transferring files from a Linux console: transfer.sh and anypaste.xyz

Posted by jpluimers on 2019/07/26

transfer.sh

anypaste.xyz

–jeroen

via: [WayBack] Interesting: Anypaste – Share And Upload Files To Compatible Hosting Sites Automatically… – DoorToDoorGeek “Stephen McLaughlin” – Google+

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

Some links about the TCP SACK PANIC attacks on Linux and FreeBSD Kernels

Posted by jpluimers on 2019/06/20

The TCP SACK vulnerabilities as found by Netflix: [WayBack] security-bulletins/2019-001.md at master · Netflix/security-bulletins · GitHub.

Easy, but slow workaround from [WayBack] linux – How to disable TCP SACK for CentOS? – Super User:

Temporary (until boot):

echo "0" > /proc/sys/net/ipv4/tcp_sack

Permanent (even after boot):

echo "net.ipv4.tcp_sack = 0" >> /etc/sysctl.conf
sysctl -p

Coverage:

–jeroen

Posted in *nix, *nix-tools, Communications Development, Development, Internet protocol suite, Power User, Security, TCP | Leave a Comment »

« Previous Entries
Next Entries »