Update cheatsheets

tldr/biff

@@ -0,0 +1,41 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# biff
+
+> A simple utility for doing datetime arithmetic, parsing and formatting.
+> More information: <https://github.com/burntsushi/biff>.
+
+- Print the current time in a format of your choosing:
+
+`biff time fmt {{[-f|--format]}} rfc3339 now`
+
+- Print multiple relative times in one command:
+
+`biff time fmt {{[-f|--format]}} '%c' now -1d 'next sat' 'last monday' '9pm last mon'`
+
+- Print the current time in another time zone, and round it the nearest 15 minute increment:
+
+`biff time in Asia/Bangkok now | biff time round {{[-i|--increment]}} 15 {{[-s|--smallest]}} minute`
+
+- Convert a time between two different time zone:
+
+`TZ='Japan' biff time in America/New_York 02:30`
+
+- Print a past or future time relative to current time:
+
+`biff time add {{-1d|1d|1w|-1m|1y|...}} now`
+
+- Add a complex duration to the current time:
+
+`biff time add '1 week, 12 hours ago' now`
+
+- Find the duration since a date in the past and round it to the desired precision:
+
+`biff span since 2025-01-20T12:00 {{[-l|--largest]}} year`
+
+- Find timestamps in a log file and reformat them into your local time in place:
+
+`biff tag lines /tmp/access.log | biff time in system | biff time fmt {{[-f|--format]}} '%c' | head {{[-n|--lines]}} 3 | biff untag {{[-s|--substitute]}}`

tldr/dunstctl

@@ -0,0 +1,33 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# dunstctl
+
+> Control the `dunst` notification daemon.
+> More information: <https://dunst-project.org/documentation/dunstctl>.
+
+- Pause/Unpause/Toggle desktop notifications:
+
+`dunstctl set-paused {{true|false|toggle}}`
+
+- Close all notifications:
+
+`dunstctl close-all`
+
+- Delete all notifications from history:
+
+`dunstctl history-clear`
+
+- Display the latest notification from history:
+
+`dunstctl history-pop`
+
+- Reload the configuration file:
+
+`dunstctl reload`
+
+- Display help:
+
+`dunstctl {{[-h|--help]}}`

tldr/dunstify

@@ -0,0 +1,26 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# dunstify
+
+> A notification tool that is an extension of `notify-send`, but has more features based around `dunst`.
+> Accepts all options of `notify-send`.
+> More information: <https://dunst-project.org/documentation/dunstify>.
+
+- Show a notification with a given title and message:
+
+`dunstify "{{Title}}" "{{Message}}"`
+
+- Show a notification with the specified urgency:
+
+`dunstify "{{Title}}" "{{Message}}" {{[-u|--urgency]}} {{low|normal|critical}}`
+
+- Specify a message ID (overwrites any previous messages with the same ID):
+
+`dunstify "{{Title}}" "{{Message}}" {{[-r|--replace]}} {{123}}`
+
+- Display help:
+
+`dunstify {{[-?|--help]}}`

tldr/espeak

@@ -5,7 +5,7 @@ source: https://github.com/tldr-pages/tldr.git
 ---
 # espeak
 
-> Uses text-to-speech to speak through the default sound device.
+> Use text-to-speech to speak through the default sound device.
 > More information: <https://espeak.sourceforge.net>.
 
 - Speak a phrase aloud:

tldr/git-for-each-ref

@@ -0,0 +1,41 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# git for-each-ref
+
+> List and optionally format references (branches, tags) in a Git repository.
+> More information: <https://git-scm.com/docs/git-for-each-ref>.
+
+- List all refs (branches and tags):
+
+`git for-each-ref`
+
+- List only branches:
+
+`git for-each-ref refs/heads/`
+
+- List only tags:
+
+`git for-each-ref refs/tags/`
+
+- Show branches merged into HEAD:
+
+`git for-each-ref --merged HEAD refs/heads/`
+
+- List short names of all refs:
+
+`git for-each-ref --format "%(refname:short)"`
+
+- Sort refs by committer date (most recent first):
+
+`git for-each-ref --sort -committerdate`
+
+- Sort refs by committer date (oldest first):
+
+`git for-each-ref --sort committerdate`
+
+- Limit output to a specified number of refs:
+
+`git for-each-ref --count {{count}}`

tldr/notify-send

@@ -0,0 +1,29 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# notify-send
+
+> Use the current desktop environment's notification system to create a notification.
+> More information: <https://manned.org/notify-send>.
+
+- Show a notification with the title "Test" and the content "This is a test":
+
+`notify-send "{{Test}}" "{{This is a test}}"`
+
+- Show a notification with a custom icon:
+
+`notify-send {{[-i|--icon]}} {{icon.png}} "{{Test}}" "{{This is a test}}"`
+
+- Show a notification for 5 seconds:
+
+`notify-send {{[-t|--expire-time]}} 5000 "{{Test}}" "{{This is a test}}"`
+
+- Show a notification with the specified urgency level (default: normal):
+
+`notify-send {{[-u|--urgency]}} {{low|normal|critical}} "{{Test}}" "{{This is a test}}"`
+
+- Show a notification with an app's icon and name:
+
+`notify-send "{{Test}}" {{[-i|--icon]}} {{google-chrome}} {{[-a|--app-name]}} "{{Google Chrome}}"`

tldr/ntp-ctl

@@ -0,0 +1,21 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# ntp-ctl
+
+> Management client for the `ntpd-rs` daemon.
+> More information: <https://docs.ntpd-rs.pendulum-project.org/man/ntp-ctl.8>.
+
+- Display information about the current state of the NTP daemon:
+
+`ntp-ctl status`
+
+- Check if the specified configuration file (default: `/etc/ntpd-rs/ntp.toml`) is valid:
+
+`ntp-ctl {{[-c|--config]}} {{path/to/config}} validate`
+
+- Interactively run a single synchronization of the clock:
+
+`sudo ntp-ctl force-sync`