diff --git a/tldr/jupyter-lab b/tldr/jupyter-lab
new file mode 100644
index 00000000..220c0998
--- /dev/null
+++ b/tldr/jupyter-lab
@@ -0,0 +1,25 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# jupyter lab
+
+> Interactive development environment for Jupyter notebooks.
+> More information: <https://jupyterlab.readthedocs.io/en/stable/>.
+
+- Start JupyterLab:
+
+`jupyter lab`
+
+- Open a specific notebook:
+
+`jupyter lab {{path/to/notebook.ipynb}}`
+
+- Start JupyterLab in a specific directory:
+
+`jupyter lab --notebook-dir {{path/to/directory}}`
+
+- Start JupyterLab in debug mode:
+
+`jupyter lab --debug`
diff --git a/tldr/jupyterlab b/tldr/jupyterlab
index 220c0998..b5532a4e 100644
--- a/tldr/jupyterlab
+++ b/tldr/jupyterlab
@@ -3,23 +3,10 @@ syntax: markdown
 tags: [tldr, common]
 source: https://github.com/tldr-pages/tldr.git
 ---
-# jupyter lab
+# jupyterlab
 
-> Interactive development environment for Jupyter notebooks.
-> More information: <https://jupyterlab.readthedocs.io/en/stable/>.
+> This command is an alias of `jupyter lab`.
 
-- Start JupyterLab:
+- View documentation for the original command:
 
-`jupyter lab`
-
-- Open a specific notebook:
-
-`jupyter lab {{path/to/notebook.ipynb}}`
-
-- Start JupyterLab in a specific directory:
-
-`jupyter lab --notebook-dir {{path/to/directory}}`
-
-- Start JupyterLab in debug mode:
-
-`jupyter lab --debug`
+`tldr jupyter lab`
diff --git a/tldr/lit b/tldr/lit
new file mode 100644
index 00000000..300ebfe2
--- /dev/null
+++ b/tldr/lit
@@ -0,0 +1,26 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# lit
+
+> LLVM integrated tester for executing LLVM and Clang style test suites, summarizing results.
+> Part of LLVM.
+> More information: <https://www.llvm.org/docs/CommandGuide/lit.html>.
+
+- Run a specified test case:
+
+`lit {{path/to/test_file.test}}`
+
+- Run all test cases in a specified directory:
+
+`lit {{path/to/test_suite}}`
+
+- Run all test cases and check the wall time for each cases, then report to summary output:
+
+`lit {{path/to/test_suite}} --time-tests`
+
+- Run individual tests with Valgrind (memory check and memory leak test):
+
+`lit {{path/to/test_file.test}} --vg --vg-leak --vg-args={{args_to_valgrind}}`
diff --git a/tldr/osx/gawk b/tldr/osx/gawk
index 9b64f31f..df662568 100644
--- a/tldr/osx/gawk
+++ b/tldr/osx/gawk
@@ -9,4 +9,4 @@ source: https://github.com/tldr-pages/tldr.git
 
 - View documentation for the original command:
 
-`tldr -p linux awk`
+`tldr awk`
diff --git a/tldr/tuc b/tldr/tuc
new file mode 100644
index 00000000..9c8b9889
--- /dev/null
+++ b/tldr/tuc
@@ -0,0 +1,30 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# tuc
+
+> Cut text (or bytes) where a delimiter matches, then keep the desired parts.
+> A more user-friendly and powerful version of `cut` with sensible defaults.
+> More information: <https://github.com/riquito/tuc>.
+
+- Cut and rearrange fields:
+
+`echo "foo bar baz" | tuc -d '{{ }}' -f {{3,2,1}}`
+
+- Replace the delimiter `space` with an arrow:
+
+`echo "foo bar baz" | tuc -d ' ' -r ' ➡ '`
+
+- Keep a range of fields:
+
+`echo "foo bar    baz" | tuc -d ' ' -f {{2:}}`
+
+- Cut using regular expressions:
+
+`echo "a,b, c" | tuc -e '{{[, ]+}}' -f {{1,3}}`
+
+- Emit JSON output:
+
+`echo "foo bar baz" | tuc -d '{{ }}' --json`