Update cheatsheets

linux/qm-showcmd

@@ -0,0 +1,21 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# qm showcmd
+
+> Show command-line which is used to start the VM (debug info).
+> More information: <https://pve.proxmox.com/pve-docs/qm.1.html>.
+
+- Show command-line for a specific virtual machine:
+
+`qm showcmd {{vm_id}}`
+
+- Put each option on a new line to enhance human readability:
+
+`qm showcmd --pretty {{true}} {{vm_id}}`
+
+- Fetch configuration values from a specific snapshot:
+
+`qm showcmd --snapshot {{string}} {{vm_id}}`