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              grpconv命令怎么用?Linux用戶和工作組管理命令解析【每日一個知識點第172期-Linux】

              grpconv命令用來開啟群組的投影密碼。Linux系統里的用戶和群組密碼,分別存放在/etc目錄下的passwd和group文件中。因系統運作所需,任何人都得以讀取它們,造成安全上的破綻。投影密碼將文件內的密碼改存在/etc目錄下的shadow和gshadow文件內,只允許系統管理者讀取,同時把原密碼置換為”x”字符。投影密碼的功能可隨時開啟或關閉,您只需執行grpconv指令就能開啟群組投影密碼。

              語法

              grpconv

              實例

              設置cdy組密碼

              groupmod --password 123456 cdy
              cat /etc/group | grep cdy
              cdy:123456:1000:     //看出密碼是123456

              啟動影子系統

              grpconv
              cat /etc/group |  grep cdy
              cdy:x:1000:      //看出密碼段已經被x替代
              
              cat /etc/gshadow | grep cdy
              cdy:123456::      //已經移到影子文件了

              注:gshadow, shadow只有root權限才可以查看。


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