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Posted by jpluimers on 2018/02/16
[WayBack] How to Install and Configure Postfix as a Send-Only SMTP Server on Ubuntu 16.04 | DigitalOcean
Postfix is a *mail transfer agent* (MTA), an application used to send and receive email. In this tutorial, we will install and configure Postfix so that it can be used to send emails by local applications only.
–jeroen
Posted in *nix, Linux, Power User, Ubuntu | Leave a Comment »
Posted by jpluimers on 2018/02/15
When you get a Window like this upon Atom.io start, and starting to report a bug, they guide you to a “start Atom in safe mode first, then try to disable all packages to sort out if it’s a package issue” and point to [WayBack] Debugging: using safe mode.
The problem here is that when you start Atom in safe mode (from the console using atom --safe) then in the preferences you cannot disable packages: clicking on the “Disable” button has absolutely no effect.
This was with atom --version
atom --version
Atom : 1.12.8
Electron: 1.3.13
Chrome : 52.0.2743.82
Node : 6.5.0
I worked around this by editing ~/.atom/config.cson as that already contained a section like this:
core:
disabledPackages: [
"nav-panel"
]
So I wrote a poor-mans little script that generated the inner portion of that block:
pushd ~/.atom && ls -1d packages/*/ | sed 's/packages\// "/g' | sed 's/\//"/g' && popd
which got me this nice list:
"atom-beautify"
"atom-html-preview"
"atom-keyboard-macros"
"atom-wrap-in-tag"
"autocomplete-xml"
"broadcast"
"close-tags"
"color-picker"
"counter"
"emmet"
"export-html"
"file-icons"
"git-plus"
"language-batch"
"language-bbcode"
"language-innosetup"
"language-pascal"
"language-plantuml"
"language-restructuredtext"
"language-routeros-script"
"linter"
"nav-panel-plus"
"nav-panel"
"omnisharp-atom"
"pandoc-convert"
"plantuml-preview"
"print-atom"
"rot13"
"rst-preview-pandoc"
"sort-lines"
"sync-settings"
"tabs-to-spaces"
"xml-formatter"
"xml-tools"
From there, I did a binary search for the offending package: broadcast so I’ve filed an issue there.
–jeroen
Posted in atom editor, Development, Diagram, PlantUML, Power User, Software Development, Text Editors, UML | 1 Comment »
Posted by jpluimers on 2018/02/15
Took me a while to figure out that you can run any command in Atom.io, even if it’s not in the menu or toolbar:
This isn’t very clear in Atom, but what you’re after is this menu item: Toggle Command Palette
Mac OS X: Shift+Command+P:
Windows: Ctrl+Shift+P
–jeroen
via: [WayBack] Where can I run Atom command? – Stack Overflow
Posted in atom editor, Development, Power User, Scripting, Software Development, Text Editors | Leave a Comment »
Posted by jpluimers on 2018/02/14
There still is no ps xf on Mac OS X.
You need brew install pstree for that. Then you can excute pstree which gives you a treeview of the processes running.
via: [WayBack] command line – Linux’ ps f (tree view) equivalent on OSX? – Ask Different
–jeroen
Posted in *nix, *nix-tools, Apple, Home brew / homebrew, iMac, Mac, Mac OS X / OS X / MacOS, MacBook, MacBook Retina, MacBook-Air, MacBook-Pro, MacMini, macOS 10.12 Sierra, OS X 10.10 Yosemite, OS X 10.11 El Capitan, OS X 10.9 Mavericks, Power User, ps | Leave a Comment »
Posted by jpluimers on 2018/02/14
I’m still amazed this is not in stock Mac OS X:
In Finder > Select a folder > Right click, we get a popup with an option to create a new folder:Is there a way to add menu item New Textfile for adding a new text file?
[WayBack] macos – Right-click, create a new text file. How? – Ask Different
One way is to use Automator scripts, but: scripting…
–jeroen
Posted in Apple, Automator scripts, Development, iMac, Mac, Mac OS X / OS X / MacOS, MacBook, MacBook Retina, MacBook-Air, MacBook-Pro, MacMini, macOS 10.12 Sierra, OS X 10.10 Yosemite, OS X 10.11 El Capitan, OS X 10.9 Mavericks, Power User, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2018/02/13
After trying to move an operating system from one disk to another, Proxmox stalled the console and ended up in a really high I/O delay.
These commands helped me finding out what was wrong:
apt-get install iotop
iotop
ps -aux | grep usbbackup
ps -aux | grep rsync
zpool status
lvscan
qm list
qm unlock ###
qm stop ###
Somehow Proxmox was thinking the VM ### was still in use, but on Linux level it wasn’t:
# lvscan
ACTIVE '/dev/pve/swap' [8.00 GiB] inherit
ACTIVE '/dev/pve/root' [27.75 GiB] inherit
ACTIVE '/dev/pve/data' [62.04 GiB] inherit
ACTIVE '/dev/pve/vm-###-disk-1' [40.00 GiB] inherita
–jeroen
Posted in *nix, Power User, Proxmox, Virtualization | Leave a Comment »
Posted by jpluimers on 2018/02/13
Interesting read [WayBack]: The mystery of the Zombie RAM | josh.com that starts with
It all started one bright morning when I wondered: Can the RAM memory on an AVR chip continue to store data after power is removed? If it can hold the data even just for a brief moment, then…
TL;DR: Always watch your uA sources. Or like Lübbe Onken puts it on G+:
In my first company, we had built a piece of hardware, which turned itself on mysteriously sometimes. We found out that this was caused by a status led that created enough current in bright sunlight.
–jeroen
via:
Posted in Arduino, Development, Hardware Development | Leave a Comment »
Posted by jpluimers on 2018/02/12
For my link archive: [WayBack] Nikon AF modules reference table
Posted in LifeHacker, Power User, Uncategorized | Leave a Comment »
Posted by jpluimers on 2018/02/12
Some notes based on The woods and trees of OpenSuSE on single-board computers – image abbreviations – and getting it installed using OS X « The Wiert Corner – irregular stream of stuff.
I needed to get Ubuntu on an ODROID-C1+ (as it looks like nobody is maintaining a current OpenSuSE for it).
Download either of these (note that “minimal” is different from “mate minimal”; see https://www.youtube.com/watch?v=jOYWx_YToh8) from de.eu.odroid.in/ubuntu_16.04lts:
I installed on a 8 gigabyte SD card that revealed itself as /dev/disk1 using this diskutil command (via osx – List all devices connected, lsblk for Mac OS X – Ask Different [WayBack])
diskutil list
So this wrote the image to SD card in a sudo su - prompt:
targetDevice="disk1"
unxz --keep ubuntu-16.04-minimal-odroid-c1-20160817.img.xz; \
diskutil umount "/dev/${targetDevice}s1"; \
dd bs=1m of="/dev/r${targetDevice}" if=ubuntu-16.04-minimal-odroid-c1-20160817.img; \
sync; \
diskutil list; \
diskutil eject "/dev/${targetDevice}"
Use the default user and password that [WayBack] ODROID Forum • View topic – Ubuntu Minimal User / Password mentions:
odroid login: root
Password: odroid
From there, create a new user and add it to the sudo group (I used visudo to check the correct group for sudoers) :
adduser jeroenp
addgroup jeroenp sudo
And then hook it up to the network and get the IP address:
ifconfig
Now you can ssh into the odroid with user jeroenp and the password assigned to it. You can also perform a sudo su - to get to root level.
First of all, install etckeeper as it’s a life saver:
apt-get install etckeeper
This will install some other packages, but that’s OK; it will end suggesting you to enter email address, name and perform an initial commit:
Initialized empty Git repository in /etc/.git/ *** Please tell me who you are. Run git config --global user.email "you@example.com" git config --global user.name "Your Name" to set your account's default identity. Omit --global to set the identity only in this repository. fatal: unable to auto-detect email address (got 'root@odroid.(none)') etckeeper commit failed; run it by hand
Do that:
cd /etc
git config --global user.email "example@example.org"
git config --global user.name "Example User"
git commit -m "initial commit"
Now perform these steps:
Change root password:
# sudo su -
# passwd
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
Disable etckeeper daily autocommits involves one line in /etc/etckeeper/etckeeper.conf:
-#AVOID_DAILY_AUTOCOMMITS=1
+AVOID_DAILY_AUTOCOMMITS=1
Change the hostname; assuming your new host name is newHostName.
/etc/hosts and replace the old hostname with newHostNamehostnamectl set-hostname newHostName
exec bash
hostname -fBoth the command prompt and the hostname output should show newHostName.
Update/Upgrade:
apt-get update
apt-get upgrade
Fix the cursor in console mode:
Somehow the Odroid C1+ does not support a blinking hardware text cursor.
–jeroen
Posted in *nix, *nix-tools, Development, etckeeper, Hardware Development, Linux, Odroid, openSuSE, Power User, Raspberry Pi, SuSE Linux, Tumbleweed, Ubuntu | Leave a Comment »
Posted by jpluimers on 2018/02/11
The [WayBack] github.com/openSUSE/susefirewall2-to-firewalld is on my research list as right before going on holiday, upgrading broke my firewall configuration (:
Tumbleweed sometimes means living on the bleeding edge (which forces you to learn new things faster), so I knew things like this could be coming.
Related:
From the IRC chat at #opensuse-factory:
[5:25pm] <wiert> Something odd happened today: on an x64 system, I didzypper dist-upgrade, and nowapache2ports80and443are not reachable from the outside any more (only onlocalhost)[5:25pm] <wiert>sysconf_addword /etc/sysconfig/SuSEfirewall2 FW_CONFIGURATIONS_EXT apache2[5:25pm] <wiert>"apache2" already present[5:26pm] <wiert> same foreapache2-ssl[5:27pm] <wiert> sshd on the same line works fine. Apache runs.[5:30pm] Son_Goku joined the chat room.[5:31pm] <wiert> Ah, I see that/etc/sysconfig/SuSEfirewall2.d/services/apache2and/etc/sysconfig/SuSEfirewall2.d/services/apache2-sslgot deleted. Why?[5:32pm] <simonizor> AFAIK, it was replaced byfirewalld[5:33pm] <simonizor> Both useiptablesas a backend, so functionality should be relatively the same[5:34pm] <wiert> Any URLs for migration tips?[5:35pm] <wiert> For now I’ve donesysconf_addword /etc/sysconfig/SuSEfirewall2 FW_SERVICES_EXT_TCP 80[5:35pm] <wiert> andsysconf_addword /etc/sysconfig/SuSEfirewall2 FW_SERVICES_EXT_TCP 443[5:35pm] <wiert> now it “works” but I need to migrate one day.
From a different system when I applied the firewall rules after updating:
# SuSEfirewall2 <38>Mar 12 15:40:13 SuSEfirewall2[20606]: Setting up rules from /etc/sysconfig/SuSEfirewall2 ... <38>Mar 12 15:40:13 SuSEfirewall2[20606]: using default zone 'ext' for interface eth0 iptables-batch v1.6.2: unknown protocol "submission" specified Try `iptables-batch -h' or 'iptables-batch --help' for more information. <35>Mar 12 15:40:17 SuSEfirewall2[20606]: Error: iptables-batch failed, re-running using iptables iptables v1.6.2: unknown protocol "submission" specified Try `iptables -h' or 'iptables --help' for more information. ip6tables-batch v1.6.2: unknown protocol "submission" specified Try `ip6tables-batch -h' or 'ip6tables-batch --help' for more information. <35>Mar 12 15:40:17 SuSEfirewall2[20606]: Error: ip6tables-batch failed, re-running using ip6tables ip6tables v1.6.2: unknown protocol "submission" specified Try `ip6tables -h' or 'ip6tables --help' for more information. <38>Mar 12 15:40:18 SuSEfirewall2[20606]: Firewall rules successfully set
–jeroen
Posted in *nix, openSuSE, Power User, SuSE Linux, Tumbleweed | Leave a Comment »
The Wiert Corner - irregular stream of stuff 