Update cheatsheets

tldr/linux/fbi

@@ -0,0 +1,29 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# fbi
+
+> Display images in a terminal framebuffer.
+> More information: <https://manned.org/fbi>.
+
+- Display an image:
+
+`sudo fbi {{path/to/file}}`
+
+- Display multiple images:
+
+`sudo fbi {{path/to/file1 path/to/file2 ...}}`
+
+- Start a slideshow with a custom delay (in seconds):
+
+`sudo fbi {{[-t|--timeout]}} {{delay}} {{path/to/files/*}}`
+
+- Scale the image to fit the screen:
+
+`sudo fbi {{[-a|--autozoom]}} {{path/to/file}}`
+
+- Display help:
+
+`fbi {{[-h|--help]}}`

tldr/linux/systemctl-start

@@ -0,0 +1,13 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# systemctl start
+
+> Start systemd units.
+> More information: <https://www.freedesktop.org/software/systemd/man/latest/systemctl.html#start%20PATTERN%E2%80%A6>.
+
+- Start a unit:
+
+`systemctl start {{unit}}`

tldr/linux/systemctl-stop

@@ -0,0 +1,17 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# systemctl stop
+
+> Stop systemd units.
+> More information: <https://www.freedesktop.org/software/systemd/man/latest/systemctl.html#stop%20PATTERN%E2%80%A6>.
+
+- Stop a unit:
+
+`systemctl stop {{unit}}`
+
+- Stop a service and suppress warnings:
+
+`systemctl stop --no-warn {{unit}}`