Define some safe commands: 

 Create file ~/bin/longliqwrc.sh

 
    
     
         
  1. alias rm='rm -i' 
    2.  
         
  2. alias cp='cp -i' 
    3.  
         
  3. alias mv='mv -i' 
    4.  
        
 
    
Add the following lines to ~/.bashrc
 
    
 
    
     
         
  1. if [ -f ~/bin/longliqw.sh ]; then 
    2.  
         
  2.     . ~/bin/longliqw.sh 
    3.  
         
  3. fi 
    4.  
        
 
    
Add the following lines to ~/.profile
 
    
 
    
     
         
  1. if [ -f "$HOME/.bashrc" ]; then 
    2.  
         
  2.     . "$HOME/.bashrc" 
    3.  
         
  3. fi 
    4.