serhii.net

Linux undelete file on ext filesystem with extundelete

extundelete /dev/sda4 --restore-file directory/file I’m shocked this works, and it can do a lot of interesting stuff - files, directories, list of deleted files, etc etc etc.

Linux output logs continuously

I always forget this: tail -f /var/log/

Pandas apply() memory hell

This is a nice read about how Pandas’ apply needs to store the Series it creates, that there’s no magic, and that inelegant loops can sometimes be faster. Relevant is the official Enhancing performance guide, that I should read.

Games

• Greed is absolutely wonderful and much more interesting than I thought at the beginning.

Rclone and backing up Google Drive

rclone is nice. I followed the guide in Google drive, and the magic command to copy all content is rclone sync "drive:Google Photos" /mnt/data/Backups/GP, about 300kb/s, and about 4 hours left.

Qutebrowser private windows

exist. qutebrowser --temp-basedir -s content.private_browsing true

IntelliJ Idea

• Shift+Enter starts a new line without breaking the current one.
• To focus the code with ideavim, the custom property suppress.focus.stealing=false worked.

Music

Resizing/converting/… a video with ffmpeg

ffmpeg -i input.mkv -s 640x480 -c:a copy output.mp4

Jupyter/pandas show all columns / limit maximum number of columns to show

pandas.set_option('display.max_columns', None).

qutebrowser adding javascript bookmarklets

javascript bookmarklets/quickmarks · Issue #221 · qutebrowser/qutebrowser · GitHub

:bind ,insta jseval alert("Hello World")

Using I/we/passive in a Bachelor’s thesis

No easy answer, but I liked here the joke “In your particular case, an inclusive we could be used to recognize the nematodes collaboration :) – Dr. belisarius May 10 ‘11 at 13:01”

• I asked another young professor whether one could use “I” and she said “Only if you want to sound like an arrogant bastard”, and observed that only old people with established reputations can get away with it.

• The passive voice should not be used to avoid writing I or we. If the entire thesis is written in the passive voice, it is much harder to read, and the sentences within it1 have to be reworded awkwardly so that some good transitions between the sentences within a paragraph are lost. On the other hand, if some sentences seem to require the passive voice, by all means those sentences should be written in the passive voice. But the passive voice should only be used where it is justified, that is, where its use improves readability of the thesis.

TL;DR use “we”, don’t use passive unless needed; don’t use “I” ever.

Also in Germany it’s bachelor’s thesis, apparently.

Bachelor’s thesis tenses

This is also really nice:

Past tense

Work done

We collected blood samples from . . . Consequently, astronomers decided to rename . . .

Work reported

Jankowsky reported a similar growth rate . . . In 2009, Chu published an alternative method to . . .

Observations

The mice in Group A developed, on average, twice as much . . . The conversion rate was close to 95% . . .

Present tense

General truths

Microbes in the human gut have a profound influence on . . . The Reynolds number provides a measure of . . .

Atemporal facts

This paper presents the results of . . . Section 3.1 explains the difference between . . . Behbood’s 1969 paper provides a framework for . . .

Future tense

Perspectives

In a follow-up experiment, we will study the role of . . . The influence of temperature will be the object of future research . . .

(As linked in the answer, taken from Effective Writing | Learn Science at Scitable.

qutebrowser

qutebrowser yanking URLs and markdown

This is amazing. ym yanks the URL with the title, like this: word choice - Bachelor thesis or Bachelor’s thesis - English Language & Usage Stack Exchange.

qutebrowser passthrough mode

<C-v> enters passthrough mode, <Shift+Escape> to exit. It works very well with Jupyter-vim.

Thesis vim marks

m means what it always means, n is the place I’ve been working at the last time, d is the end of the thesis.

Stack

• To read Effective Writing | Learn Science at Scitable
• Add my old Mediawiki bookmark scripts to qutebrowser.

Stack

• Make finally a uniform and nice vim/bspwm/… keybinding system.
• Learn vim formally, all movements and everything, and get rid of my “vim antipatterns”

Vim

Vim digraphs

:digraphs to see the available digraphs. <C-k>+%digraph% inserts it. For example, <C-k>+Pd → £

Vim movements

• '. - move to last modified line.
• D - delete everything until the end of the line.
• C - change everything until the end of the line
• U - undo all changes to this line
• S - substitute everything inside this line
• <C-a> - increment number at character
• <C-x> - decrement number at character
• F/f – move to prev/next occurrence of character
• T/t – move to before prev/next occurrence of character

Learn to use my ;->: mapping

Quotes

“I’ve come up with a set of rules that describe our reactions to technologies: 1. Anything that is in the world when you’re born is normal and ordinary and is just a natural part of the way the world works. 2. Anything that’s invented between when you’re fifteen and thirty-five is new and exciting and revolutionary and you can probably get a career in it. 3. Anything invented after you’re thirty-five is against the natural order of things.” — Douglas Adams

“Be here now”

Aaaand from this Reddit thread:

• “The mind is its own place, and in itself can make a heaven of hell, a hell of heaven.” From Milton’s ‘Paradise Lost’
• “Don’t kill the person inside you who wants to be alive.” Every time I feel down and/or have suicidal thoughts, I think about the part of me who went through so much shit to get to this place. I don’t want to throw away the effort of that person.
• Now I try and loosen up…moods come and moods go…I respect my feelings and those of others.
• “My cat wouldn’t understand where i went.”
• “If you’re going through hell, keep going.” - Winston Churchill
• – My meds keep me goin, fuck a quote. – Yeah I was about to quote: “300mg buproprion” -Dr. Baker Fuckin inspirational!
• “Bend, but don’t break.”
• " Fireflies love the dark too."
• “Only after disaster can we be resurrected. It’s only after you’ve lost everything that you’re free to do anything. Nothing is static, everything is evolving, everything is falling apart.”
• None of these keeps me going. For me it’s curiosity and nothing else.
• I think the saddest people always try their hardest to make people happy because they know what it’s like to feel absolutely worthless and they don’t want anyone else to feel like that. - Robin Williams
• “Death doesn’t stop depression, it just spreads it to somebody else.”
• “A smooth sea never made a skilled sailor” Franklin D. Roosevelt
• ‘Get busy living or get busy dying’. From The Shawshank Redemption.