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diff --git a/content/notes/_index.md b/content/notes/_index.md
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+title = "Software usage notes"
++++
+
+Here are short notes on using some programs.  Reading manuals is not always
+intuitive or quick, even though the steps are so simple; so I collect them
+here.  Notes that are longer than a few lines are collected in the main blog
+instead.
diff --git a/content/notes/devtool-theme.md b/content/notes/devtool-theme.md
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+categories = ["software", "guide"]
+title = "Emulate system theme with firefox's devtools"
+date = 2021-05-03T11:15:35+07:00
+tag = ["firefox", "css", "theme"]
++++
+
+Firefox's devtool provides you with a tool to emulate
+dark/light mode (probably Chrome does, too). It can be useful for front-end
+developers when they want to design a system-based theme switch.
+
+![My default theme, light theme](/images/default_light.png)
+![After choosing dark mode emulation](/images/emulate_dark.png)
diff --git a/content/notes/ffmpeg-cut-video.md b/content/notes/ffmpeg-cut-video.md
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+title = "How to cut videos with ffmpeg"
+date = 2024-04-24
+categories = ["software", "guide"]
+tags = ["ffmpeg"]
++++
+
+To cut video with ffmpeg, use the flag `-ss` for the beginning of the cut and
+`-to` for the end of the cut.  For example:
+
+```sh
+ffmpeg -i in.mp4 -ss 00:00:02 -to 00:00:14 out.mp4
+```
diff --git a/content/notes/ffmpeg-remove-audio.md b/content/notes/ffmpeg-remove-audio.md
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+title = "How to remove audio from videos with ffmpeg"
+date = 2024-04-24
+categories = ["software", "guide"]
+tags = ["ffmpeg"]
++++
+
+To remove audio from video, pass `-an` flag to the command.
diff --git a/content/notes/insert-unicode.md b/content/notes/insert-unicode.md
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+title = "How to insert unicode in vim"
+date = 2022-02-20
+categories = ["software", "guide"]
+tags = ["vim", "how-to", "unicode"]
+translationKey = "vim-insert-unicode"
++++
+
+Today I learned how to insert unicode in Vim.  It's simple:
+
+In insert mode, type <kbd>Ctrl+V</kbd>, then type <kbd>u</kbd>, then type the
+hex unicode.
+
+You can also type character like escape (shown as `^[`) or carriage return
+(shown as `^M`) by typing <kbd>Esc</kbd> or <kbd>Enter</kbd> respectively.
diff --git a/content/notes/json-output-format.md b/content/notes/json-output-format.md
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+title = "Formatting JSON Output with jq"
+date = 2021-04-27T17:06:51+07:00
+categories = ["software", "guide"]
+tags = ["bash", "cli", "json", "jq", "less"]
++++
+
+TIL: Syntax-highlighted JSON output
+
+If you have some command that return (long) JSON, you can view it formatted
+with color with: 
+
+```bash
+<command> | jq -C | less -r
+```
diff --git a/content/notes/keepassxc-enable-desktop-integration.md b/content/notes/keepassxc-enable-desktop-integration.md
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+title = "KeepassXC: how to enable desktop integration"
+date = 2024-04-24
+categories = ["software", "guide"]
+tags = ["keepassxc"]
++++
+
+Go to Setting > Secret Service Integration > Enable KeepassXC Freedesktop.org
+Secret Service integration.
diff --git a/content/notes/nheko-plain-creds.md b/content/notes/nheko-plain-creds.md
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+title = "Storing nheko credentials as plain text"
+date = 2024-04-24
+categories = ["software", "guide"]
+tags = ["nheko"]
++++
+
+nheko requires a keyring (like GNOME keyring or keypassxc) to store encrypted
+password, which doesn't necessarily work, or probably you just don't want to
+use them, in which case you'd want to disable that.
+
+To do this, edit `.config/nheko/nheko.conf` and add the config:
+
+```ini
+[General]
+run_without_secure_secrets_service=true
+```
diff --git a/content/notes/regex-unicode.md b/content/notes/regex-unicode.md
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+title = "How to match Unicode in RegEx"
+date = 2022-02-13T16:32:53+07:00
+categories = ["software", "guide"]
+tags = ["regex", "regular expression", "unicode"]
++++
+
+Today I learned how to match [unicode in RegEx][regex-unicode].
+
+For example, unicode-encoded letters (that is, any letters from any language)
+can be matched with `\p{L}`.  View [an example on RegEx 101][example]
+
+[regex-unicode]: https://www.regular-expressions.info/unicode.html
+[example]: https://regex101.com/r/N602FX/1
diff --git a/content/notes/socks-proxy.md b/content/notes/socks-proxy.md
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+title = "SOCKS Proxy via SSH"
+date = 2023-06-05
+categories = ["software", "guide"]
+tags = ["tips", "guide", "SOCKS proxy"]
++++
+
+[SOCKS (RFC 1928)][socks] is a protocol that can be, as said in the
+RFC itself, used for firewall traversal, or some other types of network
+blocking.
+
+If you have a remote server that you can <abbr>SSH</abbr> to, setting up a
+SOCKS connection is dead simple:
+
+```sh
+ssh -D [port] [host]
+```
+
+where `[host]` is the host name you specified in the <abbr>SSH</abbr> config
+file.
+
+How to get your software to direct its connection through this proxy depends on
+the program.  For example, in Firefox, you have to go to the setting and set it
+in the network settings---use your server's address and the port you used
+earlier.  In Chromium and similar forks, add
+`--proxy-server="socks5://host:port"` to the parameter in the command line.
+Read more on the instruction for [Firefox][guide-fox] and
+[Chromium][guide-chrom] on their respective websites.
+
+[socks]: https://www.rfc-editor.org/rfc/rfc1928
+[guide-fox]: https://support.mozilla.org/en-US/kb/connection-settings-firefox
+[guide-chrom]: https://www.chromium.org/developers/design-documents/network-stack/socks-proxy/
diff --git a/content/notes/vim-jp.md b/content/notes/vim-jp.md
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+title = "You can type Hiragana and Katakana on vim"
+date = 2021-04-19T17:58:51+07:00
+categories = ["software", "guide"]
+tags = ["vim", "japanese", "useless", "hiragana", "katakana"]
++++
+
+You can type Hiragana and Katakana on vim:
+Type Ctrl+K then type the glyph name in Romanji
+
+- Hiragana: ^Kna → な
+- Katakana: ^KNa → ナ
+
+Full list: <http://vimdoc.sourceforge.net/htmldoc/digraph.html#digraph-table>
diff --git a/content/notes/vim-paste-command.md b/content/notes/vim-paste-command.md
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+title = "Paste command output into vim"
+date = 2024-04-24
+categories = ["software", "guide"]
+tags = ["vim"]
++++
+
+To paste the command output into vim, type `:r!<command>`.
+For example, to paste current date in ISO 8601 into vim, I can type:
+`r!date -I`.
diff --git a/content/notes/vim-paste-file.md b/content/notes/vim-paste-file.md
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+title = "TIL: Paste filename in vim"
+date = 2021-04-27T23:12:29+07:00
+categories = ["software", "guide"]
+tags = ["vim"]
++++
+
+To paste the current file's name into itself, type Ctrl+R then %.