linux文件系统解压 tar: Exiting with failure status due to previous errors [Solved]

在执行

$ tar jxf rootfs.tar.bz2 -C ./rootfs/

时遇到如下问题：

tar: dev/console: Cannot mknod: Operation not permitted
tar: dev/tty: Cannot mknod: Operation not permitted
tar: dev/null: Cannot mknod: Operation not permitted
tar: Exiting with failure status due to previous errors

在解压时加上sudo，可解决。

$ sudo tar jxf rootfs.tar.bz2 -C ./rootfs/

原因在于，mknod需要使用管理员权限。