PWCONV
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pwconv, pwunconv, grpconv, grpunconv − ãã¹ã¯ã¼ãã»ã°ã«ã¼ãã® shadow åã¨ãé常ãã¡ã¤ã«ã¸ã®éå¤æ
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pwconv
pwunconv
grpconv
grpunconv
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ããã 4 ã¤ã®ããã°ã©ã ã¯ã é常ã®ãã¹ã¯ã¼ããã¡ã¤ã«ã»ã°ã«ã¼ããã¡ã¤ã«ã¨ã shadow åããããã¹ã¯ã¼ããã¡ã¤ã«ã»ã°ã«ã¼ããã¡ã¤ã«ã§ãã /etc/passwd “, ” /etc/group “, ” /etc/shadow “, ” /etc/gshadow ãæä½ããã
pwconv 㯠passwd ãã shadow ãä½æãã (ãã§ã«åå¨ããå ´å㯠shadow ã®æå ±ãç¨ãã)ã pwunconv 㯠passwd 㨠shadow ãã passwd ãä½æããshadow ãåé¤ããã grpconv 㯠group ãã gshadow ãä½æãã (ãã§ã«åå¨ããå ´å㯠gshadow ã®æå ±ãç¨ãã)ã grpunconv 㯠group 㨠gshadow ãã group ãä½æããgshadow ãåé¤ããã
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pwconv 㨠grpconv ã¨ã¯ä»¥ä¸ã®ç¹ã§é¡ä¼¼ãã¦ããã ã¾ããshadow åãã¡ã¤ã«ã«ããã¨ã³ããªã®ãã¡ã é常ãã¡ã¤ã«ã«ãªããã®ã¯ãåé¤ãããã ã¾ããshadow åãã¡ã¤ã«ã«ããã¨ã³ããªã®ãã¡ã é常ãã¡ã¤ã«ã§ãã¹ã¯ã¼ãã ‘x’ ã«ãªã£ã¦ããªããã®ã¯ãæ´æ°ãããã æå¾ã«ãé常ãã¡ã¤ã«ã«æ¸ããããã¹ã¯ã¼ã㯠‘x’ ã«ç½®ãæããããã ãããã®ããã°ã©ã ã¯ãåãã¦å¤æãè¡ãã¨ãã«ãã ã¾ãé常ã®ãã¡ã¤ã«ãæåã§ç·¨éããéã«ã shadow åãã¡ã¤ã«ãæ´æ°ããã¨ãã«ãå©ç¨ã§ããã
/etc/shadow ã«æ°ããã¨ã³ããªã追å ããã¨ãã pwconv 㯠/etc/login.defs ã® PASS_MIN_DAYS, PASS_MAX_DAYS, PASS_WARN_AGE ã®å¤ã使ãã
åãããã«ã pwunconv 㨠grpunconv ã¨ã¯ä»¥ä¸ã®ç¹ã§é¡ä¼¼ãã¦ããã é常ãã¡ã¤ã«ã®ãã¹ã¯ã¼ãã¯ã shadow åãã¡ã¤ã«ã®ãã®ã§æ´æ°ãããã é常ãã¡ã¤ã«ã«ããã¨ã³ããªã¯ã shadow åãã¡ã¤ã«ã«ã¯ãã®ã¨ã³ããªããªãã¦ãã ãã®ã¾ã¾ç½®ããç¶ããã æå¾ã«ã shadow åãã¡ã¤ã«ã¯åé¤ãããã
ãã¹ã¯ã¼ãã®æå¹æéæå ±ã®ä¸é¨ã¯ã pwunconv ã«ãã£ã¦å¤±ããããå¤æã§ãããã®ã¯å¤æãããã
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(ä¸æ£ãªã¨ã³ããªãéè¤ããã¨ã³ããªã¨ãã£ã) ã¨ã©ã¼ããã¹ã¯ã¼ããã¡ã¤ã«ãã°ã«ã¼ããã¡ã¤ã«ã«ããã¨ã ãã- ã°ã©ã ã¯æ°¸é ã«ã«ã¼ãããããããããªå½¢ã§å¤±æãããããããªãã shadow ãã¹ã¯ã¼ãã»ã°ã«ã¼ãã¸ã®å¤æã shadow åãã¡ã¤ã«ããã®éå¤æãè¡ãåã«ã pwck 㨠grpck ãå®è¡ãã¦ã¨ã©ã¼ãä¿®æ£ãããã¨ã
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login.defs(5), grpck(8), pwck(8)