# Main Menu
menu:Main Menu
1,fIle Operations,file_ops
2,Text Editing,text_editing
3,Printing,printing
4,Compile and Run Programs,compile_run
5,Mail and Messaging,mail
6,System Information,system_info
7,Change Password,change_password
8,Exit,exit

# File Operations Submenu
menu:file_ops
1,List files in current directory,ls -l
2,Copy a file,cp
3,Move or rename a file,mv
4,Delete a file,rm
5,Change directory,cd
6,Show current directory,pwd
7,Return to Main Menu,return

# Text Editing Submenu
menu:text_editing
1,Edit file,edit
2,View file,view
3,Return to Main Menu,return

# Printing Submenu
menu:printing
1,Print a file,lpr
2,List print queue,lpq
3,Return to Main Menu,return

# Compile and Run Submenu
menu:compile_run
1,Compile C program,compile
2,Run executable,run
3,Compile and run in one step,compile_run_one
4,Return to Main Menu,return

# Mail and Messaging Submenu
menu:mail
1,Send mail,send_mail
2,Check mail,check_mail
3,Return to Main Menu,return

# System Information Submenu
menu:system_info
1,Show system info,uname
2,Show uptime,uptime
3,Show disk usage,df
4,Show memory,free
5,Return to Main Menu,return

# Change Password Submenu
menu:change_password
1,Change password,passwd
2,Return to Main Menu,return