To set setuid: chmod 4XXX filename (where XXX are the octal numbers of the permissions you want to set and filename is the name of the file) setgid (set group ID) is a flag in Unix file systems that: ...

Well, setuid has no effect on directories, but setgid does, and it's a little non-intuitive. Normally, when you create a file, it's automatically owned by your user ID and your (primary) group ID. For ...

What does the "s" bit stand for in the beginning of a folder/files POSIX permissions?I know that s can stand for "setuid" in for owner and group (to escalate permissions in special conditions)I ...

Hi all,I need to run a process as the nobody user (or any unprivileged user). I can't make any guarantees about what user I start with (eg definitely not ...

This involves an understanding of setuid/setgid operations and the various effects they may have on your system and its level of security. Third, it is assumed that you are using an unmodified ...

We continue to investigate a phenomenon where normal applications inexplicably run with root privileges. As noted yesterday, this is a potentially serious security concern, as apps running with ...