Use /etc/hosts as alternative of /etc/fstab to detect whether a partition represents the root of a Linux installation; the latter might not exist in smaller/special installations like Docker images. --- Repost (refreshed) of https://www.redhat.com/archives/libguestfs/2016-February/msg00207.html src/inspect-fs.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/src/inspect-fs.c b/src/inspect-fs.c index 7f7d5d1..e9976cf 100644 --- a/src/inspect-fs.c +++ b/src/inspect-fs.c @@ -217,7 +217,8 @@ check_filesystem (guestfs_h *g, const char *mountable, else if (is_dir_etc && (is_dir_bin || is_symlink_to (g, "/bin", "usr/bin") > 0) && - guestfs_is_file (g, "/etc/fstab") > 0) { + (guestfs_is_file (g, "/etc/fstab") > 0 || + guestfs_is_file (g, "/etc/hosts") > 0)) { fs->is_root = 1; fs->format = OS_FORMAT_INSTALLED; if (guestfs_int_check_linux_root (g, fs) == -1) -- 2.5.5