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˵Ã÷:Èç¹û¶Ôumask,ȨÏÞÖµ,ÎļþµÄȨÏÞr,w,x¶¼²»Á˽âµÄÅóÓÑ,ÇëÏÈÈ¥²¹Ò»ÏÂÕâ·½ÃæµÄ֪ʶ,ÕâÀï²»×ö½éÉÜ,Ö±½Ó½øÈëÕýÌâ.
Ï£Íûͨ¹ýʵÀý½²½â,ÄÜÈøü¶àµÄ³õѧÕß¶ÔĿ¼µÄȨÏÞ¸üÇåÎú,¸üÃ÷°×!
      
±¾ÊµÀýÓõ½Á½¸öÕʺÅ:root  ºÍ Ò»°ãÓû§
(rootÓû§µÄÌáʾ·û "#" ºÅ,Ò»°ãÓû§µÄÌáʾ·û "$" ºÅ)
.ÏÂÃæÀý×ÓÖÐÓÐЩµØ·½¾Í²»ÔÙÃ÷ȷ˵Ã÷µ±Ç°ÊÇÓõÄÄĸöÕʺŲÙ×÷,¿´ÃüÁîÌáʾ·û¾ÍÃ÷°×ÁË.
      
Ê×ÏÈÓÃrootÓû§ÔËÐÐÒÔÏÂÃüÁî:
             # umask
                   µÃµ½rootÓû§µÄĬÈÏȨÏÞÑÚÂëֵΪ:0022
Ò²¾ÍÊÇ˵Èç¹ûrootÓû§Ð½¨Ò»¸öĿ¼,Ŀ¼µÄȨÏÞֵΪ755(¼´×Ô¼º¶ÔĿ¼ÓÐrwxȨÏÞ,ͬ×éÓû§¶ÔĿ¼ÓÐrxȨÏÞ,ÆäËüÓû§¶ÔĿ¼ÓÐrxȨÏÞ)
.
       ½Ó×ÅÔËÐÐÈçÏÂÃüÁî:
             #  cd /home
      ½øÈë home Ŀ¼,ÒòΪÆäËüÓû§¶¼ÄÜÖ±½Ó½øÈë´ËĿ¼,¹ÊÔÚÕâÀï×ö²âÊÔ
              # mkdir test
      Ð½¨ test Ŀ¼×÷Ϊ´Ë´Î²âÊÔµÄĿ¼
              # ls -l
                Ö÷Òª²é¿´´ËĿ¼µÄȨÏÞÐÅÏ¢
      
ÔÚÆäºóµÄ²Ù×÷ÖÐ
ÎÒÃÇÖ»¹Ø×¢ ls -l ÃüÁîÊä³öÐÅÏ¢ÖйØÓÚ test Ŀ¼(drwxr-xr-x 2 root        root       1024 07-19 21:55 test)
µÄµÚÒ»À¸(drwxr-xr-x
)µÄºóÈýλ(r-x
)(¼´ÆäËüÓû§¶Ô´ËĿ¼µÄ²Ù×÷ȨÏÞ)
.
       1.²âÊÔĿ¼µÄÖ´ÐÐȨÏÞ(x)µÄº¬Òå
       ÎÒÃǻᷢÏÖÆäËüÓû§¶Ô test Ŀ¼¾ßÓжÁºÍÖ´ÐеÄȨÏÞ.½Ó×Å
             # chmod o-x test
     È¥µôÆäËüÓû§¶Ô test Ŀ¼µÄÖ´ÐÐȨÏÞ
             # ls -l
                      


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a shortcut for linux( from linux journal )

if you come from the world of Windows, you undoubtedly understand the concept of a shortcut. In the Linux world, shortcuts do exist, but they're generally referred to as symbolic links, or symlinks. They are so named because, like shortcuts, a symlink is really just a symbolic placeholder or link to ......

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