Session 1: Linux/Unix Overview 

• Features of Unix
• Layered approach
• Kernel functions
• Booting process

Session 2: File Management and I/O Handling

• File tree structure
• File types
• File systems
• FD table
• System calls
• File operations

Session 3: Process Management 

• Process states
• Context switching
• Scheduling
• Fork operations

Session 4: Signaling Mechanisms and Timers 

• Signal handling
• Comparison with interrupts
• Alarm and interval timers