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1¡¢which
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[root@redhat ~]# which ¿ÉÖ´ÐÐÎļþÃû³Æ
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[root@redhat ~]# which passwd
/usr/bin/passwd
whichÊÇͨ¹ýPATH»·¾³±äÁ¿µ½¸Ã·¾¶ÄÚ²éÕÒ¿ÉÖ´ÐÐÎļþ£¬ËùÒÔ»ù±¾µÄ¹¦ÄÜÊÇѰÕÒ¿ÉÖ´ÐÐÎļþ
 
2¡¢whereis
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[root@redhat ~]# whereis [-bmsu] Îļþ»òÕßĿ¼Ãû³Æ
²ÎÊý˵Ã÷£º
-b £º Ö»ÕÒ¶þ½øÖÆÎļþ
-m : Ö»ÕÒÔÚ˵Ã÷Îļþmanual·¾¶ÏµÄÎļþ
-s £º Ö»ÕÒsourceÔ´Îļþ
-u £º ûÓÐ˵Ã÷ÎĵµµÄÎļþ
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[root@redhat ~]# whereis passwd
passwd: /usr/bin/passwd /etc/passwd /usr/share/man/man1/passwd.1.gz /usr/share/man/man5/passwd.5.gz
½«ºÍpasswdÎļþÏà¹ØµÄÎļþ¶¼²éÕÒ³öÀ´
 
[root@redhat ~]# whereis -b passwd
passwd: /usr/bin/passwd /etc/passwd
Ö»½«¶þ½øÖÆÎļþ²éÕÒ³öÀ´
 
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µ«ÊǸÃÊý¾Ý¿âÎļþ²¢²»ÊÇʵʱ¸üУ¬Ä¬ÈÏÇé¿öÏÂʱһÐÇÆÚ¸üÐÂÒ»´Î£¬Òò´Ë£¬ÎÒÃÇÔÚÓÃwhereisºÍlocate²éÕÒÎļþʱ£¬ÓÐʱ»áÕÒµ½ÒѾ­±»É¾³ýµÄÊý¾Ý£¬»òÕ߸ոս¨Á¢Îļþ£¬È´ÎÞ·¨²éÕÒµ½£¬Ô­Òò¾ÍÊÇÒòΪÊý¾Ý¿âÎļþûÓб»¸üС£
 
3¡¢locate
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[root@redhat ~]# locate Îļþ»òÕßĿ¼Ãû³Æ
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[root@redhat ~]# locate passwd
/home/weblogic/bea/user_projects/domains/zhanggongzhe112/myserver/stage/_appsdir_DB_war/DB.war/jsp/as/user/passwd.jsp
/home/weblogic/bea/user_projects/domains/zhanggongzhe112/myserver/stage/_appsdir_admin_war/admin.war/jsp/platform/passwd.jsp
/lib/security/pam_unix_passwd.so
/lib/security/pam_passwdqc.so
/usr/include/rpcsvc/yppasswd.x
/usr/include/rpcsvc


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