`ChRoot()` changes the root directory of the process to "/tmp".

`ConfDir()` returns the directory path where the configuration files for the running application should be stored.

`DropCapabilities()` drops all capabilities of the process.

`DropPrivileges()` drops all privileges of the process.

`DropUID()` drops the group and user privileges of the process.

`fileExists()` checks if a file exists at the given path.

`IsDirectory()` checks whether the given path is a directory.

`Mount()` mounts a tmpfs filesystem at /tmp with the `MS_RDONLY` flag.

`Unshare()` unshares the certain resources and isolates the process from the parent process.