Is there any Windows equivalent of Linux's
chmod to change the permissions of a file?
icacls sets/resets the access control lists, so you can grant/deny rights for individual SIDs & groups. It is fairly complicated though.
Here's an example I have saved in my github gist; it resets the ownership and access control list for all files in a folder and is particularly useful to fix those annoying "You need permissions from .. to perform this action" especially when moving files over from a previous install:
icacls * /reset /t /c /q
Reset replaces the existing one with the default list.
/t acts recursively on all files, folders & subfolders
/q doesn't display any success messages
/c continues with remaining files even in an error occurs.
You can also do things like backup the existing ACLs & apply them across all. Have a look at ss64 which explains the different options & switches very well.
There (sadly) can't be an exact equivalent, since Linux und DOS/Windows use attributes for different purposes, and (as Chathuranga said before) the security model is different:
- In Windows file systems, there are "hidden" (
H) and "system" (
S) attributes which don't have an equivalent in Linux; there, files are hidden by prepending the name with a dot (
- There is no equivalent to the Windows "archive" (
A) attribute, either.
- There is no equivalent to the "executable" (
x) Linux attributes in the DOS/Windows file attributes.
- There is an equivalent to the Windows "directory" (
D) attribute (but it can't be changed anyway).
- In Linux file systems, every entry is owned by exactly one user and exactly one group, and read/write/execution can be allowed for each of them, and for others. ACLs (like used by Windows) are even more flexible, but more complicated as well, and the commandline syntax is a PITA (in my humble opinion, of course)
The DOS file attribute
R (read-only) is the one which might be considered to have an equivalent: this attribute set is roughly like the
w attribute for all being missing; but the permission to change this attribute is subject to ACLs.
It might be cool to have a
chown equivalent on Windows, perhaps written in some scripting language, which in turn calls
cacls (or successors), but I don't have one.
attrib command is the closest match for very basic things (read-only, archive flags). Then there is The ACL (access control list) command
cacls. Last but not least, since Windows is actually Posix compliant, the unix-like flags do exist. If you install the Cygwin tool set, you will get a
chmod. (A little off-topic, since you are looking for an equivalent of a unix command, downloading and installing Cgygwin might be something interesting for you.)
I use Windows command
takeown.exe to change file permissions to my current logged in user id: http://technet.microsoft.com/en-us/library/cc753024.aspx