如何修改bash命令以更改权限

Question

I have this bash command to modify all files and folders permissions inside a root folder:

find . -type d -exec chmod 755 {} \;
find . -type f -exec chmod 644 {} \;

it work ok. What i should do to to exclude some folders for change permissions inside the root folder(where the bash is executed). For example, if i want to keep folder permission for folder "A" and folder "B" Thanks in advance

Answer 1

Exclude directories with -prune option:

find . -type d -name ProductA -prune -o -type d -exec chmod 755 {} \;

It tells: if file is a directory and has name ProductA , then do not descend into it ( -prune ), else ( -o means or) if file is a directory, then execute the chmod 755 on it.

find expressions are made of options, tests (can be false or true) and actions, separated by operators. When no action is given, then -print action is performed on all files for which the expression is true. -exec is an action, -prune is another. You can chain multiple actions with -a and -o . expr1 -a expr2 will execute both actions, whereas expr1 -o expr2 will execute expr2 only if expr1 evaluates to false.

So if you want to exclude multiple directories, you can write

find . -type d -name ProductA -prune -o -type d -name ProductC -prune -o -type d -exec chmod 755 {} \;
find . -type d -name ProductA -prune -o -type d -name ProductC -prune -o -type f -exec chmod 644 {} \;

or just:

find . -type d -name "Product[AC]" -prune -o -type d -exec chmod 755 {} \;
find . -type d -name "Product[AC]" -prune -o -type f -exec chmod 644 {} \;

and you can combine them too:

find . -type d -name "Product[AC]" -prune -o -type d -exec chmod 755 {} \; -o -type f -exec chmod 644 {} \;

If you have a more complex directory structure, say you want to exclude ProductA/data but not ProductB/data nor ProductA/images , then you can use the -path test:

find . -path ./ProductA/src -prune -o -print

Answer 2

You can try this:

find . -type d \\(-name "*" ! -name "A" ! -name "B" \\) -exec chmod 755 {}\\;

find . -type d \\(-name "*" find . -type d \\(-name "*" - lists all the directories in the current directories

!-name "A" !-name "B" - ignores directories with names A and B

Answer 3

您可以使用egrep -v排除多个目录，例如dirname1, dirname2 ，然后使用xargs执行chmod 。

find . -type d | egrep -v "(dirname1|dirname2)" | xargs chmod 755