Posted by jpluimers on 2020/05/22
Running autossh from Windows is still on my list, so here are a few links:
–jeroen
Posted in Communications Development, Development, Internet protocol suite, Power User, SSH, TCP, Windows | Leave a Comment »
Posted by jpluimers on 2020/05/21
Almost 20 years old, but still a very nice read [Archive.is] David Korn Tells All – Slashdot.
Another funny story involving David Korn during the not-so open source times of Microsoft late last century: [WayBack] Korn Shell Story
–jeroen
Posted in *nix, *nix-tools, bash, bash, Development, History, Power User, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2020/05/20
Cool feature I discovered from [WayBack] How to read network requests in Chrome for new tab or popup window:
chrome://net-internals/#events
It will immediately show all events from all tabs including networking events.
The red bar at the top has a drop down on the right where you can stop them and perform a few other actions.
During or after capture, you can select relevant requests from the list (through checkboxes) so the right of the pane gets their info (which is a lot: not just the request/response content including all headers and cookies, but also any delegates from extensions and their results).
Posted in Bookmarklet, Chrome, Google, Power User, Web Browsers | Leave a Comment »
Posted by jpluimers on 2020/05/19
Interesting for some projects: [WayBack] DC12V COB LED Light Strip Panel 5W 10W 20W 50W 200W 300W LED Bulb White Blue Red Flip Chip COB Lamp DIY House Car Lighting 12V-in LED Bulbs & Tubes from Lights & Lighting on Aliexpress.com | Alibaba Group
Note they are not current limited!
This means I need to read more on current limiting; these might be a start:
Via The biggest LED COB panel yet! Voltage/current tests. – YouTube
–jeroen
Posted in Development, DIY, Hardware Development, Power User | Leave a Comment »
Posted by jpluimers on 2020/05/19
From [WayBack] ipmi – Linux: Why does Single User mode work on Serial Console but not on the attached Keyboard/Video/Monitor? – Server Fault (slightly edited; thanks Patrick!):
Becauseinithas not spawned off multiple TTYs yet (getty,mgetty, etc), so you only have the primary TTY. The primary TTY is the lastconsole=parameter on the kernel command line. All the console parameters get the output, but only the last one will be able to act as input.
–jeroen
Posted in *nix, Debian, Linux, openSuSE, Power User, RedHat, SuSE Linux, Tumbleweed | Leave a Comment »
Posted by jpluimers on 2020/05/18
This is still so cool: [WayBack] Free Linux cloud shell for Gmail users … – Adrian Marius Popa – Google+:
Free Linux cloud shell for Gmail users
https://news.ycombinator.com/item?id=16247577
comments are more interesting
“If you want a free Linux box with a Public IP and SSH, I’d recommend spinning up an f1-micro VM. It’s part of the permanent free tier”
Even cooler is that you can use it both from a web browser and from your own console, more on that below.
The above links:
Posted in Google, GoogleCloudShell, Power User | Leave a Comment »
Posted by jpluimers on 2020/05/18
This looks like an ssh equivalent to testssl.sh: [WayBack] GitHub – arthepsy/ssh-audit: SSH server auditing (banner, key exchange, encryption, mac, compression, compatibility, security, etc).
It is on my list of things to try, so I’ve put a watch on the repository changes.
–jeroen
Posted in Communications Development, Development, Encryption, Internet protocol suite, Power User, Security, SSH, TCP | Leave a Comment »
Posted by jpluimers on 2020/05/15
On my research list: [WayBack] Show openSUSE:Factory / bootchart – openSUSE Build Service.
I bumped here when researching on how to list services: [WayBack] init.d – Command to list services that start on startup? – Ask Ubuntu
It seems few people use it on opensuse, but it is interesting for analysing the boot process nonetheless.
I already found out this is in fact bootchart2: [WayBack] GitHub – xrmx/bootchart: merge of bootchart-collector and pybootchartgui
Some links that should help me further are these:
From the last link, this translation:
A. systemd-analyze
You will see the total computer startup time after:
systemd-analyze
A complete list of how much each individual service has taken is when you complete:
systemd-analyze blame
You will see the most problematic processes after you complete:
systemd-analyze critical-chain
You can create a picture:
systemd-analyze plot> /tmp/systemd-analyze.svg
Suitable for: openSUSE 11.4, 12.x, 13.1, Leap 42.x
Not suitable: openSUSE 13.2
B. bootchart
First, install the bootchart package (bootchart 2 version of the program). If you are using openSUSE Leap 42.x or later, enable bootchart2 (and optional bootchart2-done) service:
systemctl enable bootchart2
systemctl enable bootchart2-done
If you are using openSUSE version 13.1 or earlier, go to YaST → (System) → Startup and enter kernel startup parameters:
initcall_debug printk.time = y quiet init = / sbin / bootchartd rdinitrd = / sbin / bootchartd
The next time you start your computer, the /var/log/bootchart.png image will be created to help you further optimize your system startup. For example, if you do not need an AppArmor who cares about security, you can disable the boot.apparmor service through the YaST Service Configuration Module.
Suitable for: openSUSE 11.4, 12.x, 13.1, 13.2, Leap 42.x
–jeroen
Posted in *nix, *nix-tools, Linux, openSuSE, Power User, SuSE Linux, Tumbleweed | Leave a Comment »
Posted by jpluimers on 2020/05/15
Nowadays, most OpenSuSE Linux services are systemd based. Listing those is simple with systemctl list-units --all (configured ones) and systemctl list-unit-files (nonconfigured ones as well), though their states can be many as the command-completion for the --state parameter:
# systemctl list-unit-files --state
abandoned deactivating failed masked not-found remounting-sigterm start-pre stop-sigkill waiting
activating deactivating-sigkill final-sigkill merged plugged running stop stop-sigterm
activating-done deactivating-sigterm final-sigterm mounted registered sigkill stop-post stub
activating-sigkill dead inactive mounting reload sigterm stop-pre tentative
activating-sigterm elapsed listening mounting-done reloading start stop-pre-sigkill unmounting
active error loaded mounting-sigkill remounting start-chown stop-pre-sigterm unmounting-sigkill
auto-restart exited making mounting-sigterm remounting-sigkill start-post stop-sigabrt unmounting-sigterm
The odd thing: not all states from the service list are in the completion. These are missing from the list-unit-files:
generated
static
transient
In the past, most services were System V based, where you can use service --status-all. Contrary to the documentation (which indicates “The –status-all option displays the status of all loaded service units.”), it lists all services.
On OpenSuSE though, it now lists both System V based and systemd based services in one go. Since usually there are no more System V services (virtually all have been migrated to systemd a few years ago), the netto result is systemd services.
Based on [WayBack] init.d – Command to list services that start on startup? – Ask Ubuntu
–jeroen
Posted in *nix, *nix-tools, Linux, openSuSE, Power User, SuSE Linux, Tumbleweed | Leave a Comment »
Posted by jpluimers on 2020/05/14
Based on [WayBack] appletv – How can I show a read-only version of Google Calendar on Apple TV 4th generation? – Ask Different there is one choice that might work on Apple TV 3rd generation and 4th generation:
This is the only practical solution I dissected from [WayBack] How to surf the web and use Safari on Apple TV – Macworld UK: Here is how to browse the internet and watch web services on your Apple TV.
Installing requires a few steps as described at
Limiting to only Apple TV 4, another solution is also possible:
However the last solution is not a real web browser, so it does not allow a layout I’m using for the calendar, or actually two calendars:
The reason I need this is because my brother is mentally retarded having problems with abstract concepts like relative time and scheduling. Like me he is also easily distracted and not good at repeating tasks. So looking at a schedule at least once a day is tough for him.
He is very good at concrete topics, especially ones he can put to practice right away like “will it rain on my way to work”. That makes him look at this web page in the first place.
Currently this calendar is shown on a monitor by a Raspberry Pi attached to it.
But I might go for the Apple TV 3 route later on.
–jeroen
Posted in Apple, Apple TV, Development, iOS, iOS Development, Mobile Development, Power User | Leave a Comment »
The Wiert Corner - irregular stream of stuff 