pct-exec: add page (#17572)

Author: Managor

pages/linux/pct-exec.md

@@ -0,0 +1,16 @@
+# pct exec
+
+> Launch a command inside a specified container.
+> More information: <https://pve.proxmox.com/pve-docs/pct.1.html>.
+
+- Launch a command in a container:
+
+`pct {{[ex|exec]}} {{100}} {{command}}`
+
+- Open a bash shell in a container:
+
+`pct {{[ex|exec]}} {{100}} bash`
+
+- Pass arguments to the command:
+
+`pct {{[ex|exec]}} {{100}} -- {{command}} {{arguments}}`