Update cheatsheets

tldr/linux/mkvpropedit

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# mkvpropedit
+
+> Modify properties of existing Matroska files without a complete remux.
+> More information: <https://mkvtoolnix.download/doc/mkvpropedit.html>.
+
+- Delete title:
+
+`mkvpropedit {{[-d|--delete]}} title {{path/to/file.mkv}}`
+
+- Mark subtitle track 3 as SDH - Subtitles for deaf and hearing impared:
+
+`mkvpropedit {{path/to/file.mkv}} {{[-e|--edit]}} track:s3 {{[-s|--set]}} flag-hearing-impaired=1`
+
+- Mark audio track 2 as Default:
+
+`mkvpropedit {{path/to/file.mkv}} {{[-e|--edit]}} track:a2 {{[-s|--set]}} flag-default=1`
+
+- Delete the name of video track 1:
+
+`mkvpropedit {{path/to/file.mkv}} {{[-e|--edit]}} track:v1 {{[-d|--delete]}} name`

tldr/linux/systemctl-soft-reboot

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# systemctl soft-reboot
+
+> Shut down and reboot userspace, leaving the kernel running.
+> More information: <https://www.freedesktop.org/software/systemd/man/latest/systemctl.html#soft-reboot>.
+
+- Perform a soft reboot immediately:
+
+`systemctl soft-reboot`
+
+- Force a soft reboot:
+
+`systemctl soft-reboot --force`
+
+- Schedule a soft reboot for a specific time:
+
+`systemctl soft-reboot --when "{{timestamp}}"`
+
+- Cancel a scheduled soft reboot:
+
+`systemctl soft-reboot --when cancel`

tldr/linux/systemctl-suspend-then-hibernate

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# systemctl suspend-then-hibernate
+
+> Suspend the system, then automatically hibernate after a period of inactivity.
+> More information: <https://www.freedesktop.org/software/systemd/man/latest/systemctl.html#suspend-then-hibernate>.
+
+- Suspend the system and hibernate after the configured delay:
+
+`systemctl suspend-then-hibernate`
+
+- Force suspend-then-hibernate (bypass inhibitor locks):
+
+`systemctl suspend-then-hibernate --force`