diff --git a/tldr/ifdata b/tldr/ifdata
index 8091975e..94f70311 100644
--- a/tldr/ifdata
+++ b/tldr/ifdata
@@ -16,11 +16,11 @@ source: https://github.com/tldr-pages/tldr.git
 
 `ifdata -e {{eth0}}`
 
-- [p]rint the IPv4 [a]dress and the [n]etmask of the specified interface:
+- [p]rint the IPv4 [a]ddress and the [n]etmask of the specified interface:
 
 `ifdata -pa -pn {{eth0}}`
 
-- [p]rint the [N]etwork adress, the [b]roadcast adress, and the [m]TU of the specified interface:
+- [p]rint the [N]etwork address, the [b]roadcast adress, and the [m]TU of the specified interface:
 
 `ifdata -pN -pb -pm {{eth0}}`
 
diff --git a/tldr/linux/apptainer-registry b/tldr/linux/apptainer-registry
new file mode 100644
index 00000000..18a6fcd0
--- /dev/null
+++ b/tldr/linux/apptainer-registry
@@ -0,0 +1,42 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# apptainer registry
+
+> Manage authentication to OCI/Docker registries.
+> See also: `apptainer pull`, `apptainer push`.
+> More information: <https://apptainer.org/docs/user/main/cli/apptainer_registry.html>.
+
+- List all configured registry credentials:
+
+`apptainer registry list`
+
+- Log in to a registry with a username (password will be prompted):
+
+`apptainer registry login {{[-u|--username]}} {{username}} docker://{{registry}}`
+
+- Log in to a custom OCI registry:
+
+`apptainer registry login {{[-u|--username]}} {{username}} oras://{{registry}}`
+
+- Log in with username and password:
+
+`apptainer registry login {{[-u|--username]}} {{username}} {{[-p|--password]}} {{password}} docker://{{registry}}`
+
+- Log in with a password from `stdin`:
+
+`echo "{{password}}" | apptainer registry login {{[-u|--username]}} {{username}} --password-stdin docker://{{registry}}`
+
+- Log in using a custom authentication file:
+
+`apptainer registry login --authfile {{path/to/auth.json}} {{[-u|--username]}} {{username}} docker://{{registry}}`
+
+- Log out from a registry:
+
+`apptainer registry logout docker://{{registry}}`
+
+- Log out using a custom authentication file:
+
+`apptainer registry logout --authfile {{path/to/auth.json}} docker://{{registry}}`
diff --git a/tldr/oxipng b/tldr/oxipng
index f8d912e5..c72e23d9 100644
--- a/tldr/oxipng
+++ b/tldr/oxipng
@@ -24,9 +24,9 @@ source: https://github.com/tldr-pages/tldr.git
 
 `oxipng {{[-o|--opt]}} {{0|1|2|3|4|5|6|max}} {{path/to/file.png}}`
 
-- Set the PNG interlacing type (`0` removes interlacing, `1` applies Adam7 interlacing, `keep` preserves existing interlacing; default is `0`):
+- Set the PNG interlacing type (`off` removes interlacing, `on` applies Adam7 interlacing, `keep` preserves existing interlacing; default is `off`):
 
-`oxipng {{[-i|--interlace]}} {{0|1|keep}} {{path/to/file.png}}`
+`oxipng {{[-i|--interlace]}} {{off|on|keep}} {{path/to/file.png}}`
 
 - Perform additional optimization on images with an alpha channel:
 
@@ -34,7 +34,7 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Use the much slower but stronger Zopfli compressor with max optimization:
 
-`oxipng {{[-Z|--zopfli]}} {{[-o|--opt]}} max {{path/to/file.png}}`
+`oxipng {{[-z|--zopfli]}} {{[-o|--opt]}} max {{path/to/file.png}}`
 
 - Strip all non-critical metadata chunks: