Update cheatsheets

tldr/linux/systemctl-list-timers

@@ -0,0 +1,25 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# systemctl list-timers
+
+> List all active systemd timers.
+> More information: <https://www.freedesktop.org/software/systemd/man/systemctl.html#list-timers%20PATTERN…>.
+
+- List all active timers:
+
+`systemctl list-timers`
+
+- List all timers, including inactive ones:
+
+`systemctl list-timers {{[-a|--all]}}`
+
+- List timers matching a pattern:
+
+`systemctl list-timers {{pattern}}`
+
+- List timers matching a specific state:
+
+`systemctl list-timers --state {{active|inactive|failed|...}}`