Only in /home/lihao/work/nfs_root/fs_mini/dev: ttyw4 Only in /home/lihao/work/nfs_root/fs_mini/dev: ttyw5 Only in /home/lihao/work/nfs_root/fs_mini/dev: ttyw6 Only in /home/lihao/work/nfs_root/fs_mini/dev: ttyw7 ...