diff --git a/tldr/cisco-ios/question-mark b/tldr/cisco-ios/question-mark
new file mode 100644
index 00000000..5aeb62ba
--- /dev/null
+++ b/tldr/cisco-ios/question-mark
@@ -0,0 +1,21 @@
+---
+syntax: markdown
+tags: [tldr, cisco-ios]
+source: https://github.com/tldr-pages/tldr.git
+---
+# ?
+
+> Get context sensitive.
+> More information: <https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/fundamentals/configuration/15mt/fundamentals-15-mt-book/cf-cli-basics.html#GUID-223128D2-FB6D-418D-86C6-06D1D0DA51B3>.
+
+- Get available commands:
+
+`?`
+
+- Get storages that are listable:
+
+`dir ?`
+
+- Show what IP information is viewable:
+
+`ip show ?`
diff --git a/tldr/cisco-ios/transport b/tldr/cisco-ios/transport
index 8212f293..b942dcea 100644
--- a/tldr/cisco-ios/transport
+++ b/tldr/cisco-ios/transport
@@ -12,3 +12,7 @@ source: https://github.com/tldr-pages/tldr.git
 - Restrict line protocols to `ssh`:
 
 `transport input ssh`
+
+- Restrict line protocols to `telnet`:
+
+`transport input telnet`
diff --git a/tldr/conda-doctor b/tldr/conda-doctor
new file mode 100644
index 00000000..ed371dea
--- /dev/null
+++ b/tldr/conda-doctor
@@ -0,0 +1,25 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# conda doctor
+
+> Display a health report for your environment.
+> More information: <https://docs.conda.io/projects/conda/en/latest/commands/doctor.html>.
+
+- View report for the currently active environment:
+
+`conda doctor`
+
+- Specify an environment by name:
+
+`conda doctor {{[-n|--name]}} {{environment_name}}`
+
+- Specify an environment by its path:
+
+`conda doctor {{[-p|--prefix]}} {{path/to/environment}}`
+
+- Enable verbose output (Note: the `-v` flag can be repeated to increase verbosity):
+
+`conda doctor {{[-v|--verbose]}}`
diff --git a/tldr/linux/lvresize b/tldr/linux/lvresize
index e51ce933..0b3c8a9c 100644
--- a/tldr/linux/lvresize
+++ b/tldr/linux/lvresize
@@ -11,16 +11,16 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Change the size of a logical volume to 120 GB:
 
-`lvresize --size {{120G}} {{volume_group}}/{{logical_volume}}`
+`lvresize {{[-L|--size]}} 120G {{volume_group}}/{{logical_volume}}`
 
 - Extend the size of a logical volume as well as the underlying filesystem by 120 GB:
 
-`lvresize --size +{{120G}} --resizefs {{volume_group}}/{{logical_volume}}`
+`lvresize {{[-L|--size]}} +120G {{[-r|--resizefs]}} {{volume_group}}/{{logical_volume}}`
 
 - Extend the size of a logical volume to 100% of the free physical volume space:
 
-`lvresize --size {{100}}%FREE {{volume_group}}/{{logical_volume}}`
+`lvresize {{[-l|--extents]}} 100%FREE {{volume_group}}/{{logical_volume}}`
 
 - Reduce the size of a logical volume as well as the underlying filesystem by 120 GB:
 
-`lvresize --size -{{120G}} --resizefs {{volume_group}}/{{logical_volume}}`
+`lvresize {{[-L|--size]}} -120G {{[-r|--resizefs]}} {{volume_group}}/{{logical_volume}}`