When installing custom Bash scripts like Leiningen for Clojure development, it's crucial to follow Linux filesystem conventions. The Filesystem Hierarchy Standard (FHS) defines specific purposes for each directory:

/usr/local/bin - For scripts installed locally by the system administrator
/opt - For third-party application packages
/usr/bin - For distribution-managed executables (avoid for custom scripts)
/home/username/bin - For user-specific scripts (not system-wide)

For system-wide availability of your Bash scripts, consider these options:

# Option 1: /usr/local/bin (most common for admin-installed tools)
sudo install lein /usr/local/bin/

# Option 2: /opt (better for complex applications with multiple files)
sudo mkdir -p /opt/leiningen/
sudo install lein /opt/leiningen/
sudo ln -s /opt/leiningen/lein /usr/local/bin/lein

After installation, ensure your script is in the system's PATH:

# Check current PATH
echo $PATH

# If using /opt, you might need to add to PATH
echo 'export PATH=$PATH:/opt/leiningen' | sudo tee /etc/profile.d/leiningen.sh
chmod +x /etc/profile.d/leiningen.sh

Proper permissions are essential for security:

# Set appropriate ownership
sudo chown root:root /usr/local/bin/lein

# Set executable permissions
sudo chmod 755 /usr/local/bin/lein

Test your installation works system-wide:

# As regular user
which lein
lein --version

# Check permissions
ls -l /usr/local/bin/lein

For single-user systems, ~/.local/bin is also acceptable:

mkdir -p ~/.local/bin
install lein ~/.local/bin/
echo 'export PATH=$PATH:~/.local/bin' >> ~/.bashrc
source ~/.bashrc

Remember to document your installation:

• Create a README in /opt/leiningen/ if using that location
• Consider creating an uninstall script
• Track versions if you maintain multiple releases

When installing custom Bash scripts like Leiningen for system-wide use, it's crucial to understand the Linux Filesystem Hierarchy Standard (FHS). The main directories to consider are:

/usr/local/bin      # Primary location for local system executables
/usr/bin            # System-wide command binaries
/opt                # For add-on application software packages
~/.local/bin        # User-specific binaries (requires PATH modification)

For Leiningen or similar custom scripts, here are the most appropriate locations:

1. /usr/local/bin - The standard choice for locally installed software:

   sudo install lein /usr/local/bin/
   

2. /opt - Better for more complex installations with multiple files:

   sudo mkdir /opt/leiningen
   sudo install lein /opt/leiningen/
   sudo ln -s /opt/leiningen/lein /usr/local/bin/lein
   

After installation, verify the script is in your PATH:

echo $PATH
which lein

If using ~/.local/bin, add this to your .bashrc or .zshrc:

export PATH="$HOME/.local/bin:$PATH"

Here's the complete process for Leiningen:

# Download the script
wget https://raw.githubusercontent.com/technomancy/leiningen/stable/bin/lein

# Make it executable
chmod +x lein

# Install to recommended location
sudo mv lein /usr/local/bin/

# First run to bootstrap
lein

Maintain proper permissions:

sudo chown root:root /usr/local/bin/lein
sudo chmod 755 /usr/local/bin/lein