diff --git a/tldr/linux/btrfs-filesystem b/tldr/linux/btrfs-filesystem
index e5218340..59d8fceb 100644
--- a/tldr/linux/btrfs-filesystem
+++ b/tldr/linux/btrfs-filesystem
@@ -31,3 +31,7 @@ source: https://github.com/tldr-pages/tldr.git
 - Summarize disk usage for the files in a directory recursively:
 
 `sudo btrfs filesystem du {{[-s|--summarize]}} {{path/to/directory}}`
+
+- Create a swap file:
+
+`sudo btrfs filesystem mkswapfile --size {{8g}} --uuid {{clear|random|time|UUID_value}} {{path/to/swapfile}}`
diff --git a/tldr/linux/efibootmgr b/tldr/linux/efibootmgr
index 0464d2eb..0612a460 100644
--- a/tldr/linux/efibootmgr
+++ b/tldr/linux/efibootmgr
@@ -22,7 +22,7 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Change the current boot order:
 
-`sudo efibootmgr {{[-o|--bootorder]}} {{0002,0008,0001,0005}}`
+`sudo efibootmgr {{[-o|--bootorder]}} {{0002,0008,0001,001A,...}}`
 
 - Delete a boot option:
 
diff --git a/tldr/pulumi-update b/tldr/pulumi-update
new file mode 100644
index 00000000..8db52582
--- /dev/null
+++ b/tldr/pulumi-update
@@ -0,0 +1,12 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# pulumi update
+
+> This command is an alias of `pulumi up`.
+
+- View documentation for the original command:
+
+`tldr pulumi up`