Key Features of the Enhanced lsgroups Tool:

1. Beautiful Colorized Interface

• Gradient headers and separators
• Status indicators with emoji-like symbols
• Color-coded output for different information types

2. Multiple Display Modes

• -m, --my: Current user (default)
• -u <user>: Specific user
• -a, --all: All users
• -l, --list: All system groups
• -g <group>: Group members listing

3. Enhanced Information

• User Details: UID, GID, home directory, shell
• Group Details: GID, member lists, primary group identification
• Permission Analysis: Group-writable files, security warnings
• System Integration: Works with /etc/passwd, /etc/group, getent

4. Output Formats

• -c, --compact: Simple list for scripting
• -t, --table: Table format
• -d, --details: Verbose group information
• -v, --verbose: Maximum details

5. Sorting Options

• Sort by: name (default), id, or user
• Intelligent sorting for different display modes

6. Security Features

• Highlights primary groups
• Shows group-writable files in /etc
• Permission warnings for sensitive files

7. Professional Features

• Proper error handling with color-coded messages
• Help system with examples
• Terminal detection for automatic color disabling
• Progress indicators for large operations
• Root privilege detection for advanced features

8. Usage Examples:

# Basic usage
lsgroups
lsgroups -h

# Different display modes
lsgroups -a              # All users
lsgroups -u alice        # Specific user
lsgroups -g sudo         # Group members
lsgroups -l              # All system groups

# Formatting options
lsgroups -t              # Table format
lsgroups -c              # Compact output
lsgroups -d -i           # Detailed with IDs
lsgroups -p              # Show permission info

# Combined usage
lsgroups -a -s id -t     # All users sorted by ID in table
lsgroups -u root -p -v   # Root user with permissions (verbose)

Installation:

wget https://github.com/stefan-hacks/lsgroups/blob/main/lsgroups.sh

# Make it executable
chmod +x lsgroups.sh

# Optionally, move to system PATH
sudo cp lsgroups.sh /usr/local/bin/lsgroups

# Add completion and source in your bash profile
source lsgroups-completion.bash

#!/usr/bin/env bash
# lsgroups-completion.bash

_lsgroups_completion() {
    local cur prev opts
    COMPREPLY=()
    cur="${COMP_WORDS[COMP_CWORD]}"
    prev="${COMP_WORDS[COMP_CWORD-1]}"
    
    opts="-h --help -a --all -c --compact -d --details -g --group -i --id -l --list -m --my -n --no-color -p --permissions -s --sort -t --table -u --user -v --verbose"
    
    case "${prev}" in
        -g|--group)
            # Complete group names
            local groups=$(getent group | cut -d: -f1)
            COMPREPLY=( $(compgen -W "${groups}" -- ${cur}) )
            return 0
            ;;
        -u|--user)
            # Complete usernames
            local users=$(getent passwd | cut -d: -f1)
            COMPREPLY=( $(compgen -W "${users}" -- ${cur}) )
            return 0
            ;;
        -s|--sort)
            # Complete sort fields
            COMPREPLY=( $(compgen -W "name id user" -- ${cur}) )
            return 0
            ;;
        *)
            ;;
    esac
    
    COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
    return 0
}

complete -F _lsgroups_completion lsgroups

This tool provides a professional, feature-rich alternative to basic group listing commands with beautiful formatting, comprehensive information, and security insights suitable for system administrators and power users.