dd if=xxx.iso of=/dev/sdb bs=1M
用以上命令前必须卸载u盘,sdb是你的u盘,bs=1M是块的大小,后面的数值大,写的速度相对块一点,但也不是无限的,我一般选2M,注意,执行命令后很块完成,但u盘还在闪,等不闪了,安全移除。
[root@ok Desktop]# fdisk -l Disk /dev/sda: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x000dcf9e Device Boot Start End Blocks Id System /dev/sda1 * 1 64 512000 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 64 60802 487873536 8e Linux LVM Disk /dev/mapper/vg_ok-lv_root: 53.7 GB, 53687091200 bytes 255 heads, 63 sectors/track, 6527 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Disk /dev/mapper/vg_ok-lv_swap: 3841 MB, 3841982464 bytes 255 heads, 63 sectors/track, 467 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Disk /dev/sdd: 15.5 GB, 15502147584 bytes #这是Ｕ盘 71 heads, 32 sectors/track, 13326 cylinders Units = cylinders of 2272 * 512 = 1163264 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x39768880 Device Boot Start End Blocks Id System /dev/sdd1 * 1 1011 1148464 17 Hidden HPFS/NTFS Disk /dev/mapper/vg_ok-lv_home: 442.1 GB, 442050281472 bytes 255 heads, 63 sectors/track, 53742 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000
[root@ok Desktop]# /bin/dd if=/home/ISO/CentOS-7-x86_64-Minimal-1511.iso of=/dev/sdb
上面的这命令注意是/dev/sdb 不是/dev/sdb1