linux的mount命令出错you must specify the filesystem type

# mount /dev/sdb /mnt
 
  
mount: you must specify the filesystem type解决方案： 先执行​
   ​  mkfs.ext3 /dev/vdb # 该命令意思为快速格式化U盘为ext3格式 
   
# mkfs.ext3 /dev/vdb
 
    
mke2fs 1.41.12 (17-May-2010)
 
    
Filesystem label=
 
    
OS type: Linux
 
    
Block size=4096 (log=2)
 
    
Fragment size=4096 (log=2)
 
    
Stride=0 blocks, Stripe width=0 blocks
 
    
32768000 inodes, 131072000 blocks
 
    
6553600 blocks (5.00%) reserved for the super user
 
    
First data block=0
 
    
Maximum filesystem blocks=4294967296
 
    
4000 block groups
 
    
32768 blocks per group, 32768 fragments per group
 
    
8192 inodes per group
 
    
Superblock backups stored on blocks:
 
    
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
 
    
4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,
 
    
102400000
 
    
 
 
    
Writing inode tables: done
 
    
Creating journal (32768 blocks): done
 
    
Writing superblocks and filesystem accounting information: done
 
    
 
 
    
This filesystem will be automatically checked every 25 mounts or
 
    
180 days, whichever comes first. Use tune2fs -c or -i to override. 然后重新mount就可以了，或者直接指定挂载类型就行了：​
     ​#mount -t ext3 /dev/vdb /home