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diff --git a/.gitignore b/.gitignore
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+*.pdf
diff --git a/README.md b/README.md
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+# Cheatsheets
+
+A personal list of Linux-related tips, tricks, and reminders.
diff --git a/ffmpeg.md b/ffmpeg.md
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+# ffmpeg tricks
+
+## Record screen
+
+    ffmpeg -f x11grab -s 1920x1080 -i :0.0 out.mkv
+
+## Record from webcam
+
+    ffmpeg -i /dev/video0 out.mkv
+
+## Record sound
+
+    ffmpeg -f alsa -i default out.flac
diff --git a/lilypond.md b/lilypond.md
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+# Lilypond stuff
+
+Docs: `info LilyPond`.
+
+## Fine-grained page size
+
+    #(set! paper-alist (cons '("custom size" . (cons (* 3.8 cm) (* 1.6 cm)))
+                             paper-alist))
+    \paper {
+      #(set-paper-size "custom size")
+    }
+
+## Remove footer
+
+    \header {
+        tagline = ##f
+    }
+
+## Rhythm stuff
+
+### Setting beat divisions
+
+    \overrideTimeSignatureSettings
+          4/4        % timeSignatureFraction
+          1/4        % baseMomentFraction
+          #'(3 1)    % beatStructure
+          #'()       % beamExceptions
+    \time 4/4
+    \repeat unfold 8 { c8 } |
+    \revertTimeSignatureSettings 4/4 % reverts to defaults
+    \time 4/4
+    \repeat unfold 8 { c8 } |
+
+### Pickup measure
+
+    \time 3/4
+    \partial 8
+    e8 | a4 c8 b c4 |
diff --git a/locale.md b/locale.md
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+# Locale tweaks
+
+Every time after a clean install I have problems with multibyte (Polish)
+characters not being handled by the terminal properly. To solve this: generate
+both the `en_US` and `pl_PL` utf8 locales, then create a `.config/locale.conf`:
+
+    LANG="pl_PL.utf8"
+    LC_MESSAGES="en_US.utf8"
+    LC_TIME="en_US.utf8"
+    LC_NUMERIC="en_US.utf8"
+    LC_MEASUREMENT="en_US.utf8"
+    LC_MONETARY="en_US.utf8"
+    LC_CTYPE="pl_PL.utf8"
+
+## Polish font for console
+
+    # /etc/vconcole.conf
+    KEYMAP=pl2
+    FONT=lat2-16
diff --git a/markdown.md b/markdown.md
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+# Markdown/Pandoc tricks
+
+## Math
+
+    $\text{\LaTeX}$
+
+    \begin{equation}
+        \mathbb{N} \ni 2 + 2 = 2^2
+    \end{equation}
+
+## Links
+
+### Named links
+
+    [This][link name] is a link. [Link name][] is the link's name.
+
+    [link name]: <https://en.wikipedia.org> (link title)
+
+### Automatic links
+
+    <https://youtube.com>
+
+## Presentations
+
+    pandoc in.md -t beamer -o out.pdf
+    pandoc in.md -t beamer -o out.pdf -i # incremental lists
+    pandoc in.md -t beamer --slide-level 2 -o out.pdf # # - section, ## - slide
+
+### Markdown details
+
+* `#` is a new slide with heading
+* Metadata to generate title page, select theme, etc.:
+
+        ---
+        title:
+        - Title
+        subtitle:
+        - Subtitle
+        author:
+        - Author Name
+        - Another Author
+        theme:
+        - Copenhagen
+        toc: true
+        ---
diff --git a/pdf.md b/pdf.md
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+# PDF operations
+
+## Merge
+
+    gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -sOutputFile=out.pdf in1.pdf in2.pdf
+
+## Compress
+
+    gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/default -dNOPAUSE -dQUIET -dBATCH -dDetectDuplicateImages -dCompressFonts=true -r150 -sOutputFile=output.pdf input.pdf
+
+## Extract pages
+
+    pdfjam --outfile out.pdf in.pdf 1,3,4-7
diff --git a/ranger.md b/ranger.md
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+# Ranger tricks
+
+## Bulkrename
+
+    :bulkrename
+
+Opens the selected filenames in vim for editing.
diff --git a/video.md b/video.md
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+# Video editing
+
+## Cut
+
+    ffmpeg -i in.mp4 -codec:v copy -codec:a copy -ss START_TIME -t DURATION out.mp4
+    ffmpeg -ss START_TIME -t DURATION -i in.mp4 -codec:v copy -codec:a copy out.mp4
diff --git a/vim.md b/vim.md
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+# Vim tricks
+
+## Navigating help
+
+| prefix | example       | context                                          |
+| ------ | ------------- | ------------------------------------------------ |
+| `:`    | `:h :r`       | ex command (command starting with a colon)       |
+| `none` | `:h r`        | normal mode                                      |
+| `v_`   | `:h v_r`      | visual mode                                      |
+| `i_`   | `:h i_CTRL-W` | insert mode                                      |
+| `c_`   | `:h c_CTRL-R` | ex command line                                  |
+| `/`    | `:h /\r`      | search pattern (in this case, `:h \r` also works |
+| `'`    | `:h 'ro'`     | option                                           |
+| `-`    | `:h -r`       | Vim argument (starting Vim)                      |