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| -rw-r--r-- | .gitignore | 1 | ||||
| -rw-r--r-- | README.md | 3 | ||||
| -rw-r--r-- | ffmpeg.md | 13 | ||||
| -rw-r--r-- | lilypond.md | 38 | ||||
| -rw-r--r-- | locale.md | 19 | ||||
| -rw-r--r-- | markdown.md | 45 | ||||
| -rw-r--r-- | pdf.md | 13 | ||||
| -rw-r--r-- | ranger.md | 7 | ||||
| -rw-r--r-- | video.md | 6 | ||||
| -rw-r--r-- | vim.md | 14 |
10 files changed, 159 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..a136337 --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +*.pdf diff --git a/README.md b/README.md new file mode 100644 index 0000000..8ed2f05 --- /dev/null +++ b/README.md @@ -0,0 +1,3 @@ +# Cheatsheets + +A personal list of Linux-related tips, tricks, and reminders. diff --git a/ffmpeg.md b/ffmpeg.md new file mode 100644 index 0000000..6abed19 --- /dev/null +++ b/ffmpeg.md @@ -0,0 +1,13 @@ +# 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 new file mode 100644 index 0000000..a59c48d --- /dev/null +++ b/lilypond.md @@ -0,0 +1,38 @@ +# 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 new file mode 100644 index 0000000..abecb35 --- /dev/null +++ b/locale.md @@ -0,0 +1,19 @@ +# 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 new file mode 100644 index 0000000..4c8835e --- /dev/null +++ b/markdown.md @@ -0,0 +1,45 @@ +# 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 + --- @@ -0,0 +1,13 @@ +# 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 new file mode 100644 index 0000000..139aa8b --- /dev/null +++ b/ranger.md @@ -0,0 +1,7 @@ +# Ranger tricks + +## Bulkrename + + :bulkrename + +Opens the selected filenames in vim for editing. diff --git a/video.md b/video.md new file mode 100644 index 0000000..dddccb0 --- /dev/null +++ b/video.md @@ -0,0 +1,6 @@ +# 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 @@ -0,0 +1,14 @@ +# 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) | |