插入usb
1. fdisk -l
2.
Device Boot Start End Blocks Id System
/dev/hda1 * 16065 401624 192780 83 Linux
/dev/hda2 417690 8418059 4000185 82 Linux swap / Solaris
/dev/hda3 8434125 12434309 2000092+ 83 Linux
/dev/hda4 12450375 976768064 482158845 f W95 Ext'd (LBA)
/dev/hda5 12450438 20450744 4000153+ 83 Linux
/dev/hda6 20466873 976768064 478150596 83 Linux
Disk /dev/uba: 250.1 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders, total 488397168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/uba1 63 488392064 244196001 83 Linux <==這個就是未掛載的usb裝置
3. mount /dev/uba1 /mnt <==掛載到/mnt
cd /mnt
4. umount /mnt <==卸載/mnt
cd /mnt
cd mail-backup
cp -dR * /var/spool/mail-backup/