diff --git a/crates/nu-command/src/core_commands/alias.rs b/crates/nu-command/src/core_commands/alias.rs
index 225865f2ed..17ff2b8a91 100644
--- a/crates/nu-command/src/core_commands/alias.rs
+++ b/crates/nu-command/src/core_commands/alias.rs
@@ -27,7 +27,7 @@ impl Command for Alias {
 
     fn extra_usage(&self) -> &str {
         r#"This command is a parser keyword. For details, check:
-  https://www.nushell.sh/book/thinking_in_nushell.html"#
+  https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
     fn is_parser_keyword(&self) -> bool {
diff --git a/crates/nu-command/src/core_commands/def.rs b/crates/nu-command/src/core_commands/def.rs
index 4a365b7655..19f2928a07 100644
--- a/crates/nu-command/src/core_commands/def.rs
+++ b/crates/nu-command/src/core_commands/def.rs
@@ -28,7 +28,7 @@ impl Command for Def {
 
     fn extra_usage(&self) -> &str {
         r#"This command is a parser keyword. For details, check:
-  https://www.nushell.sh/book/thinking_in_nushell.html"#
+  https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
     fn is_parser_keyword(&self) -> bool {
diff --git a/crates/nu-command/src/core_commands/def_env.rs b/crates/nu-command/src/core_commands/def_env.rs
index 14c66022be..1115a715f8 100644
--- a/crates/nu-command/src/core_commands/def_env.rs
+++ b/crates/nu-command/src/core_commands/def_env.rs
@@ -28,7 +28,7 @@ impl Command for DefEnv {
 
     fn extra_usage(&self) -> &str {
         r#"This command is a parser keyword. For details, check:
-  https://www.nushell.sh/book/thinking_in_nushell.html
+  https://www.nushell.sh/book/thinking_in_nu.html
 
 === EXTRA NOTE ===
 All blocks are scoped, including variable definition and environment variable changes.
diff --git a/crates/nu-command/src/core_commands/export.rs b/crates/nu-command/src/core_commands/export.rs
index 589170cd46..0f0f8687bf 100644
--- a/crates/nu-command/src/core_commands/export.rs
+++ b/crates/nu-command/src/core_commands/export.rs
@@ -23,7 +23,7 @@ impl Command for ExportCommand {
 
     fn extra_usage(&self) -> &str {
         r#"This command is a parser keyword. For details, check:
-  https://www.nushell.sh/book/thinking_in_nushell.html"#
+  https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
     fn is_parser_keyword(&self) -> bool {
diff --git a/crates/nu-command/src/core_commands/export_alias.rs b/crates/nu-command/src/core_commands/export_alias.rs
index 7a989ae806..51ebd27116 100644
--- a/crates/nu-command/src/core_commands/export_alias.rs
+++ b/crates/nu-command/src/core_commands/export_alias.rs
@@ -27,7 +27,7 @@ impl Command for ExportAlias {
 
     fn extra_usage(&self) -> &str {
         r#"This command is a parser keyword. For details, check:
-  https://www.nushell.sh/book/thinking_in_nushell.html"#
+  https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
     fn is_parser_keyword(&self) -> bool {
diff --git a/crates/nu-command/src/core_commands/export_def.rs b/crates/nu-command/src/core_commands/export_def.rs
index 0f25c6faf3..6b06e677fe 100644
--- a/crates/nu-command/src/core_commands/export_def.rs
+++ b/crates/nu-command/src/core_commands/export_def.rs
@@ -28,7 +28,7 @@ impl Command for ExportDef {
 
     fn extra_usage(&self) -> &str {
         r#"This command is a parser keyword. For details, check:
-  https://www.nushell.sh/book/thinking_in_nushell.html"#
+  https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
     fn is_parser_keyword(&self) -> bool {
diff --git a/crates/nu-command/src/core_commands/export_def_env.rs b/crates/nu-command/src/core_commands/export_def_env.rs
index b08311b0c6..c84dca2805 100644
--- a/crates/nu-command/src/core_commands/export_def_env.rs
+++ b/crates/nu-command/src/core_commands/export_def_env.rs
@@ -28,7 +28,7 @@ impl Command for ExportDefEnv {
 
     fn extra_usage(&self) -> &str {
         r#"This command is a parser keyword. For details, check:
-  https://www.nushell.sh/book/thinking_in_nushell.html
+  https://www.nushell.sh/book/thinking_in_nu.html
 
 === EXTRA NOTE ===
 All blocks are scoped, including variable definition and environment variable changes.
diff --git a/crates/nu-command/src/core_commands/export_env.rs b/crates/nu-command/src/core_commands/export_env.rs
index 8196e22fd9..2122be399e 100644
--- a/crates/nu-command/src/core_commands/export_env.rs
+++ b/crates/nu-command/src/core_commands/export_env.rs
@@ -31,7 +31,7 @@ impl Command for ExportEnv {
 
     fn extra_usage(&self) -> &str {
         r#"This command is a parser keyword. For details, check:
-  https://www.nushell.sh/book/thinking_in_nushell.html"#
+  https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
     fn is_parser_keyword(&self) -> bool {
diff --git a/crates/nu-command/src/core_commands/export_extern.rs b/crates/nu-command/src/core_commands/export_extern.rs
index 0148332f6d..fd7295f974 100644
--- a/crates/nu-command/src/core_commands/export_extern.rs
+++ b/crates/nu-command/src/core_commands/export_extern.rs
@@ -23,7 +23,7 @@ impl Command for ExportExtern {
 
     fn extra_usage(&self) -> &str {
         r#"This command is a parser keyword. For details, check:
-  https://www.nushell.sh/book/thinking_in_nushell.html"#
+  https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
     fn is_parser_keyword(&self) -> bool {
diff --git a/crates/nu-command/src/core_commands/export_use.rs b/crates/nu-command/src/core_commands/export_use.rs
index 20bf53a50d..933342611d 100644
--- a/crates/nu-command/src/core_commands/export_use.rs
+++ b/crates/nu-command/src/core_commands/export_use.rs
@@ -22,7 +22,7 @@ impl Command for ExportUse {
 
     fn extra_usage(&self) -> &str {
         r#"This command is a parser keyword. For details, check:
-  https://www.nushell.sh/book/thinking_in_nushell.html"#
+  https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
     fn is_parser_keyword(&self) -> bool {
diff --git a/crates/nu-command/src/core_commands/extern_.rs b/crates/nu-command/src/core_commands/extern_.rs
index 5490463a0f..51a89bb624 100644
--- a/crates/nu-command/src/core_commands/extern_.rs
+++ b/crates/nu-command/src/core_commands/extern_.rs
@@ -23,7 +23,7 @@ impl Command for Extern {
 
     fn extra_usage(&self) -> &str {
         r#"This command is a parser keyword. For details, check:
-  https://www.nushell.sh/book/thinking_in_nushell.html"#
+  https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
     fn is_parser_keyword(&self) -> bool {
diff --git a/crates/nu-command/src/core_commands/for_.rs b/crates/nu-command/src/core_commands/for_.rs
index f0195b328c..58d4394a58 100644
--- a/crates/nu-command/src/core_commands/for_.rs
+++ b/crates/nu-command/src/core_commands/for_.rs
@@ -46,7 +46,7 @@ impl Command for For {
 
     fn extra_usage(&self) -> &str {
         r#"This command is a parser keyword. For details, check:
-  https://www.nushell.sh/book/thinking_in_nushell.html"#
+  https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
     fn is_parser_keyword(&self) -> bool {
diff --git a/crates/nu-command/src/core_commands/hide.rs b/crates/nu-command/src/core_commands/hide.rs
index ccb0892c69..fa4e6abc28 100644
--- a/crates/nu-command/src/core_commands/hide.rs
+++ b/crates/nu-command/src/core_commands/hide.rs
@@ -26,7 +26,7 @@ impl Command for Hide {
         r#"Definitions are hidden by priority: First aliases, then custom commands.
 
 This command is a parser keyword. For details, check:
-  https://www.nushell.sh/book/thinking_in_nushell.html"#
+  https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
     fn is_parser_keyword(&self) -> bool {
diff --git a/crates/nu-command/src/core_commands/if_.rs b/crates/nu-command/src/core_commands/if_.rs
index 38b757e389..4821c54d4c 100644
--- a/crates/nu-command/src/core_commands/if_.rs
+++ b/crates/nu-command/src/core_commands/if_.rs
@@ -35,7 +35,7 @@ impl Command for If {
 
     fn extra_usage(&self) -> &str {
         r#"This command is a parser keyword. For details, check:
-  https://www.nushell.sh/book/thinking_in_nushell.html"#
+  https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
     fn is_parser_keyword(&self) -> bool {
diff --git a/crates/nu-command/src/core_commands/let_.rs b/crates/nu-command/src/core_commands/let_.rs
index 41272144aa..3b750b9940 100644
--- a/crates/nu-command/src/core_commands/let_.rs
+++ b/crates/nu-command/src/core_commands/let_.rs
@@ -28,7 +28,7 @@ impl Command for Let {
 
     fn extra_usage(&self) -> &str {
         r#"This command is a parser keyword. For details, check:
-  https://www.nushell.sh/book/thinking_in_nushell.html"#
+  https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
     fn is_parser_keyword(&self) -> bool {
diff --git a/crates/nu-command/src/core_commands/module.rs b/crates/nu-command/src/core_commands/module.rs
index 5c0068263b..6c009d5f5a 100644
--- a/crates/nu-command/src/core_commands/module.rs
+++ b/crates/nu-command/src/core_commands/module.rs
@@ -27,7 +27,7 @@ impl Command for Module {
 
     fn extra_usage(&self) -> &str {
         r#"This command is a parser keyword. For details, check:
-  https://www.nushell.sh/book/thinking_in_nushell.html"#
+  https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
     fn is_parser_keyword(&self) -> bool {
diff --git a/crates/nu-command/src/core_commands/overlay/add.rs b/crates/nu-command/src/core_commands/overlay/add.rs
index fa5be88c2c..9c8da1a4c1 100644
--- a/crates/nu-command/src/core_commands/overlay/add.rs
+++ b/crates/nu-command/src/core_commands/overlay/add.rs
@@ -39,7 +39,7 @@ impl Command for OverlayAdd {
 
     fn extra_usage(&self) -> &str {
         r#"This command is a parser keyword. For details, check:
-  https://www.nushell.sh/book/thinking_in_nushell.html"#
+  https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
     fn is_parser_keyword(&self) -> bool {
diff --git a/crates/nu-command/src/core_commands/overlay/command.rs b/crates/nu-command/src/core_commands/overlay/command.rs
index 0bcb6636cc..6e77a7509c 100644
--- a/crates/nu-command/src/core_commands/overlay/command.rs
+++ b/crates/nu-command/src/core_commands/overlay/command.rs
@@ -23,7 +23,7 @@ impl Command for Overlay {
 
     fn extra_usage(&self) -> &str {
         r#"This command is a parser keyword. For details, check:
-  https://www.nushell.sh/book/thinking_in_nushell.html"#
+  https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
     fn is_parser_keyword(&self) -> bool {
diff --git a/crates/nu-command/src/core_commands/overlay/new.rs b/crates/nu-command/src/core_commands/overlay/new.rs
index 48956e4c0b..f9aa230e45 100644
--- a/crates/nu-command/src/core_commands/overlay/new.rs
+++ b/crates/nu-command/src/core_commands/overlay/new.rs
@@ -31,7 +31,7 @@ impl Command for OverlayNew {
         r#"The command will first create an empty module, then add it as an overlay.
 
 This command is a parser keyword. For details, check:
-  https://www.nushell.sh/book/thinking_in_nushell.html"#
+  https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
     fn is_parser_keyword(&self) -> bool {
diff --git a/crates/nu-command/src/core_commands/overlay/remove.rs b/crates/nu-command/src/core_commands/overlay/remove.rs
index fc2e0b0ca6..8a8a0a4c74 100644
--- a/crates/nu-command/src/core_commands/overlay/remove.rs
+++ b/crates/nu-command/src/core_commands/overlay/remove.rs
@@ -34,7 +34,7 @@ impl Command for OverlayRemove {
 
     fn extra_usage(&self) -> &str {
         r#"This command is a parser keyword. For details, check:
-  https://www.nushell.sh/book/thinking_in_nushell.html"#
+  https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
     fn is_parser_keyword(&self) -> bool {
diff --git a/crates/nu-command/src/core_commands/register.rs b/crates/nu-command/src/core_commands/register.rs
index 0d55416046..f26979f1dc 100644
--- a/crates/nu-command/src/core_commands/register.rs
+++ b/crates/nu-command/src/core_commands/register.rs
@@ -43,7 +43,7 @@ impl Command for Register {
 
     fn extra_usage(&self) -> &str {
         r#"This command is a parser keyword. For details, check:
-  https://www.nushell.sh/book/thinking_in_nushell.html"#
+  https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
     fn is_parser_keyword(&self) -> bool {
diff --git a/crates/nu-command/src/core_commands/source.rs b/crates/nu-command/src/core_commands/source.rs
index 885495cd73..5754ffbcc1 100644
--- a/crates/nu-command/src/core_commands/source.rs
+++ b/crates/nu-command/src/core_commands/source.rs
@@ -28,7 +28,7 @@ impl Command for Source {
 
     fn extra_usage(&self) -> &str {
         r#"This command is a parser keyword. For details, check:
-  https://www.nushell.sh/book/thinking_in_nushell.html"#
+  https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
     fn is_parser_keyword(&self) -> bool {
diff --git a/crates/nu-command/src/core_commands/use_.rs b/crates/nu-command/src/core_commands/use_.rs
index b23561da8f..32b017b348 100644
--- a/crates/nu-command/src/core_commands/use_.rs
+++ b/crates/nu-command/src/core_commands/use_.rs
@@ -25,7 +25,7 @@ impl Command for Use {
 
     fn extra_usage(&self) -> &str {
         r#"This command is a parser keyword. For details, check:
-  https://www.nushell.sh/book/thinking_in_nushell.html"#
+  https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
     fn is_parser_keyword(&self) -> bool {