这意味着，某人(用户、组或所有人)有权执行(或读或写)脚本(或一般的文件)。在
权限以不同的方式表示：$ chmod +x file.py # makes it executable by anyone
$ chmod +w file.py # makes it writeabel by anyone
$ chmod +r file.py # makes it readably by anyone
$ chmod u+x file.py # makes it executable for the owner (user) of the file
$ chmod g+x file.py # makes it executable for the group (of the file)
$ chmod o+x file.py # makes it executable for the others (everybody)
您可以用同样的方法删除权限，只需将+替换为-
^{pr2}$
八进制数以不同的方式表达相同的内容。
4是阅读，2是写作，1是执行。在
简单数学：read + execute = 5
read + write + execute = 7
execute + write = 3
...
在一个简短而甜蜜的命令中：# 1st digit: user permissions
# 2nd digit: group permissions
# 3rd digit: 'other' permissions
# add the owner all perms.,
# the group and other only write and execution
$ chmod 755 file.py
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