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                            ### 缺省權限umask

**創建目錄的缺省權限是777 
創建普通文件的權限是666**


umask能幫助用戶修改創建文件的默認權限。 


**創建目錄的最終權限，就是目錄777減去umask的后3位
 創建普通文件的最終權限，就是666減去umask的后3位**

umask修改：

臨時修改：
umask 0033
永久修改：
.bashrc 文件
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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