The Android system commands  
  Native commands in /usr (bold)  
  
    - Comparison : diff cmp sort uniq
    
 
    - Disks : mount df du fdisk pdisk disklabel newfs mkfs umount
    
 
    - Edition : cut sed vi
    
 
    - Files and directories : cd cp dd du ln ls mkdir mv pwd rm rmdir touch
    
 
    - System : uname
    
 
    - Permissions : chmod chgrp chown
    
 
    - Process : kill nohup pidof pkill ps systat top
    
 
    - Search : locate egrep fgrep find grep
    
 
    - Session : login pwd logout
    
 
    - Shell : ash bash csh ksh sh zsh
    
 
    - Time : date sleep usleep
    
 
  
  Native commands in /usr (italics)  
  
    - Specific : busybox dmesg mknod stty sync
    
 
    - Other commands are available in busybox
    
 
  
  These commands have been studied on an Android 2.2 Froyo tablet.
They may be different on other machines and other versions.