diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 304689aa..d5bee4f3 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -152,3 +152,12 @@ repos:
         language: system
         types: [text]
         files: \.(xacro|urdf|sdf|xml|launch)$
+
+  - repo: local
+    hooks:
+      - id: check-line-length-under-100
+        name: Check line length
+        description: Ensure no line is longer than 100 characters.
+        entry: bash -c 'if (( $(awk "{ if (length > 100) print }" $1 | wc -l) > 0 )); then echo "Line too long in file $1"; exit 1; fi'
+        language: system
+        files: .
diff --git a/extras/lint_local/lint_local.sh b/extras/lint_local/lint_local.sh
index 87142020..c5725414 100755
--- a/extras/lint_local/lint_local.sh
+++ b/extras/lint_local/lint_local.sh
@@ -44,7 +44,7 @@ done
 
 # Check if Python 3 is installed before checking Python packages
 if ! command -v python3 &>/dev/null; then
-  echo -e "\033[31mPython is not installed. Install it to proceed with Python package checks.\033[0m"
+  echo -e "\033[31mPython is not installed. Install to proceed.\033[0m"
 else
   echo "Checking Python dependencies to run lints..."
 
@@ -69,11 +69,17 @@ if [ "$all_dependencies_installed" = true ]; then
     find . -iname '*.cpp' -o -iname '*.h' | xargs clang-format -i
 
     echo -e "\033[32m[3/6] =========  Linting XML files     ===========\033[0m"
-    find . \( -iname '*.urdf' -o -iname '*.sdf' -o -iname '*.xacro' -o -iname '*.xml' -o -iname '*.launch' \) -print0 | xargs -0 xmllint --noout
+    find . \( -iname '*.urdf' -o -iname '*.sdf' -o -iname '*.xacro' \
+      -o -iname '*.xml' -o -iname '*.launch' \) -print0 | xargs -0 xmllint --noout
 
     echo -e "\033[32m[4/6] =========  Running ShellCheck    ===========\033[0m"
     # shellcheck disable=SC2038
-    find . -iname '*.sh' | xargs shellcheck
+    find . -iname '*.sh' | while read -r file; do
+      awk '{ if (length($0) > 100) \
+      printf "\033[31mError in file %s: Line %d is %d characters long \
+      (should be under 100):\n%s\n\033[0m", \
+      FILENAME, NR, length($0), $0 }' "$file"
+    done
 
     echo -e "\033[32m[5/6] =========  Linting YAML files    ===========\033[0m"
     find . \( -iname '*.yml' -o -iname '*.yaml' \) -print0 | xargs -0 yamllint
@@ -84,5 +90,6 @@ if [ "$all_dependencies_installed" = true ]; then
     # shellcheck disable=SC2028
     echo "\033[32mAll linting processes completed. Awesome!\033[0m"
 else
-    echo -e "\033[31mNot all dependencies are installed. Please install the missing packages before proceeding.\033[0m"
+    echo -e "\033[31mNot all dependencies are installed. \
+    Please install the missing packages before proceeding.\033[0m"
 fi
diff --git a/extras/ros-jazzy-gz-harmonic-install.sh b/extras/ros-jazzy-gz-harmonic-install.sh
index 61c146fd..78feb62f 100644
--- a/extras/ros-jazzy-gz-harmonic-install.sh
+++ b/extras/ros-jazzy-gz-harmonic-install.sh
@@ -32,6 +32,8 @@ sudo apt install -y \
 echo "Installation complete!"
 
 sudo curl -sSL https://raw.githubusercontent.com/ros/rosdistro/master/ros.key -o /usr/share/keyrings/ros-archive-keyring.gpg
+# shellcheck disable=SC1091
+# shellcheck disable=SC2086
 echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/ros-archive-keyring.gpg] http://packages.ros.org/ros2-testing/ubuntu $(. /etc/os-release && echo $UBUNTU_CODENAME) main" | sudo tee /etc/apt/sources.list.d/ros2.list >/dev/null
 sudo wget https://packages.osrfoundation.org/gazebo.gpg -O /usr/share/keyrings/pkgs-osrf-archive-keyring.gpg
 echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/pkgs-osrf-archive-keyring.gpg] http://packages.osrfoundation.org/gazebo/ubuntu-stable $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/gazebo-stable.list >/dev/null