Linux Commands 5. File Permission : chmod

Описание: / d # # # # # # # # #
file / directory Owner/user : u Group : g other people : o

chmod o-w file1 : take away write permission from other
chmod 0+w file1 : give write permission to other
chmod -w file1 : take away write permission of file1
chmod +w file1 : give write permission for file1


read : r : 4
write : w : 2
execute : x : 1
No permission : - : 0

ls -l: everyone get all permission
chmod 754 file1 : u(4+2+1) g(4+1) o(4)