Ways to Draw Diagrams Displayed on Math.SE
Posted on December 23, 2020
| 2 minutes
| Vincent Tam
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0 comment
I wanted to start a meta question, but I don’t see a point of that after viewing some related posts listed at the end of the next subsection.
Intended question You may vote on your preferred way.
Ways Advantages Disadvantages AMScd supported on Math.SE for a long time no diagonal arrowssyntax less well-knownTwo-way arrows $\rightleftarrows$ look odd array supported on Math.SE for a long timeeasier syntaxwrite basic diagonal arrows like $\nearrow$ fine tuning spacing is harddiagonal arrows only work for neighboring nodes ASCIIFlow WYSIWYG interface lines are rendered as slashes in code TikZ well known syntaxcan draw pretty diagrams not supported on SE, need to import as picture others?
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Combat Procrastination
Posted on November 23, 2020
| 1 minutes
| Vincent Tam
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0 comment
My notes for a YouTube video about procrastination on one hearing only.
Why?
Boring tasks.
It’s necessary?
Yes: Make it fun. Get a study partner. Find a more energetic time. No: Get rid of it. Surrounding environment.
Identify someone who procrastinates in your circle of influence. Distance yourself from them, or Be aware of what their behavior. Perfectionism
Know about yourself. Reality: nothing can be perfect. Five strategies against procrastination:
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GIMP w'ont Start after Ubuntu Distro Upgrade
Posted on October 9, 2020
| 2 minutes
| Vincent Tam
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0 comment
Problem After upgrading to Ubuntu 20.04 form 18.04, I wasn’t able to start GIMP 2.10. The message was in the same format as that in a related Ask Ubuntu question, except that the version numbers were greater.
I attempted installing the package gegl, which was irrelavant to the problem.
Analysis I found the answers mentioning the package libgegl helpful.
$ dpkg -l | grep gegl ii gegl 0.4.22-3 amd64 Generic Graphics Library Test Program ii libgegl-0.
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Recover Mysql Root Password
Posted on October 7, 2020
| 1 minutes
| Vincent Tam
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0 comment
Just a little linklog to a relevant page on How to Forge. Root privileges are needed.
Stop service: service mysql stop
Start MySQL server w/o password: mysqld_safe --skip-grant-tables &
Connect to CLI client as root: mysql -u root
Reset root password. Here’s the syntax for โฅv.5.7.6.
mysql> use mysql; mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD("newpass"); mysql> flush privileges; mysql> quit Repeat step 1, or killall mysqld if it doesn’t work.
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Pandoc LaTeX Mermaid on GitLab CI
Posted on August 28, 2020
(Last modified on June 11, 2022)
| 1 minutes
| Vincent Tam
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0 comment
Goal To provide an open-source alternative to the Docker image escalope/pandoc-mermaid-plantuml, whose Dockerfile isn’t available.
The rationale behind these difficult setup is simple: construct informative Mermaid diagram with intuitive Markdown syntax in an open-source and economic way.
This newly constructed Docker image is entirely on GitLab. No Docker Hub account is needed. For sample usage, consult .gitlab-ci.yml in my test project.
Difficulties issues raghur/mermaid-filter#51 and #52 issue gitlab-org/gitlab-runner#4566 Useful code/articles time-machine-project/requests-for-comments@470b0c5 Dockerfile Reduce Docker Image Sizes Using Alpine Best practices for building docker images with GitLab CI with the accompanying gist The code block in the highlighted comment in item 2 of the above section pandoc installation for Docker Sample Dockerfile for Alpine Linux in the troubleshooting of Puppeteer sc250024/docker-mermaid-cli@3c9ddb5 src/puppeteerConfigFile.
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Site Maintenance for Hugo v0.60
Posted on April 14, 2020
| 2 minutes
| Vincent Tam
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3 comments
Background I lacked motivation to keep this tweaked theme up with Hugo’s development after last summer. When I came back yesterday, I saw that some pages using Font Awesome icons were broken. Apart from that, the ToC list level problem resurfaced.
Fixed ToC The solution that I had adopted no longer worked. Luckily, some users provided a shorter code in the later discussions. The one from user501254 caught me. I first tried to copy his code into the partial layout for ToC.
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Set up GitHub Actions for Beautiful Jekyll
Posted on September 2, 2019
| 1 minutes
| Vincent Tam
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0 comment
GitHub Actions provide CI/CD support, which might interest many GitHub users. I’ve applied for this feature a week ago. Luckily, my application for the trial was approved by GitHub. Tonight, I’ve found the motivation for making my first step in my forked repo VincentTam/beautiful-jekyll.
My setup:
Clicked on the “Action” tab of the repo. Chose the workflow file template for Jekyll. Added a slash / in front of srv in chmod 777 srv/jekyll, so as to fix the “no such file or directory” error.
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Customized Archetype for This Site
Posted on August 10, 2019
| 1 minutes
| Vincent Tam
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4 comments
Background I prefer including the date into the Permalink of a post. Everytime I create a new post, I type
hugo new post/$(date -I)-post-title.md to ensure that the date is correct.
Problem The title field in the post’s front matter contained the date, which wasn’t something that I wanted because it’s already shown next to the icon.
Observations Neither \d nor [\d] works for the PCRE character class \d.
Solution I tried piping replaceRE, but I didn’t manage to get it work.
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Icon in Hugo Navbar
Posted on August 10, 2019
| 1 minutes
| Vincent Tam
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0 comment
Motivation The original navbar in words took up half of the horizontal spaces of the viewport. I couldn’t add new items like “Tags” to display the tag list.
Work Thanks to the pre field in Hugo Menus, one can easily add the icon as an HTML element by some editing on the template file.
{{ range .Site.Menus.main.ByWeight }} {{ if .HasChildren }} <li class="navlinks-container"> {{ if .Pre }} <a class="navlinks-parent" title="{{ .
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Network Interface Name Detection in Conky
Once-off Conky config for network graphs
Posted on August 8, 2019
(Last modified on April 13, 2023)
| 2 minutes
| Vincent Tam
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0 comment
When one changes connection type (say, from ethernet to Wi-Fi), the interface name changes (e.g. eth0 โ wlan1). To avoid changing Conky config file all the time, here’s a little Lua function for finding the network interface name.
function findInterface() local handle = io.popen('ip a | grep "state UP" | cut -d: -f2 | tr -d " "') local result = handle:read('*a'):gsub('\n$','') handle:close() return result end ip a gives everything about connection info.
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