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

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Archive for May 15th, 2020 • Search: mos6502 G+ posts

Posted by jpluimers on 2020/05/15

With the demise of G+, I am glad that most of the [WayBack] mos6502 posts were archived at [WayBack] • Search: mos6502 G+ posts

Via [WayBack] This week, OUP/M, a 6502 CP/M-ish operating system from 1983, in the process of recovery from Jian-Xiong Shao’s Masters Thesis into Github. And a reques… – mos6502 – Google+

[WayBack] mos6502 – Google+

6502 posts – new projects and interesting old projects from the archives


Posted in 6502, History | Leave a Comment »

Show openSUSE:Factory / bootchart – openSUSE Build Service

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:


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


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

Listing services on OpenSuSE Linux

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:


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


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

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