fdisk –l查看dos/win/ext2分区(partiton,不是slice,slice是solaris分区)
[root@localhost etc]# /sbin/fdisk -l Disk /dev/hda: 80.0 GB, 80026361856 bytes 255 heads, 63 sectors/track, 9729 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot /dev/hda5 |
linux
下把DOS扩展分区和逻辑分区都按hda1,2,3,4,5,6排列。扩展分区必须在1-4内,逻辑分区必须>4
[root@vm /]# fdisk
Usage: fdisk [-l] [-b SSZ] [-u] device |
mount无参数------显示当前mount上的设备
df -h 常用于代替mount和/sbin/fdisk
–l,来看当前mount情况,因为它不显示“虚mount设备”
# df -h Filesystem Size Used Avail Use% Mounted on /dev/hda2 4.8G 2.9G 1.7G 65% / /dev/shm 93M 0 93M 0% /dev/shm |
而mount显示的虚mount太多 [root@localhost etc]# mount /dev/hda2 on / type ext2 (rw) /dev/proc on /proc type proc /dev/hda1 on /mnt/c type vfat (rw) |
linux 下设备名
IDE设备 | /dev/hda1 尾字母hda,hdb表示不同的硬盘 尾数字hda1,hda2,hda3表示不同的分区 |
SCSI Device | /dev/sd2 |
光驱 | /dev/cdrom |
磁带 | /dev/rmt/0 (常用于tar) |
软驱 | /dev/fd 或 /dev/fd0 |
注意,安装linux后,不要随便换硬盘的总线,或硬盘的master/slave,因为hda,hdb,都是自动生成的,换总线后或
master/slave后,会造成/dev 设备文件和fstab内容不匹配
为什么/var都建议单独一个分区?
/var分区是存放logfile以及系统变动文件的文件系统(/var/tmp和/var/lib/mysql之类的都很大)
所以不要把/var文件系统包括再root分区里,以免有恶意程序恶意扩大日志文件来dos根分区。
为什么建议/home也单独一个分区?
一来也是为了保护/分区
二来单独分区可以单独处理,比如在其他系统下mount,tar等
/etc/fstab-------开机自动mount
windows分区
vi /etc/fstab
/dev/hda4 |
文件系统 mount point 分区格式 mount参数 umask=000指定加载后的目录的权限问题, 都是0,向所有用户开放读写权限 |
mount [option]
filesystem [mount-point]
-t vfat or ext2 -t :Type ext2 linux分区 vfat dos/win分区 不设-t,缺省mount认为是vfat |
-o utf8 utf8是编码格式,否则中文会有问题 |
cat
/proc/filesystems
--------获得系统支持的文件系统类型
[root@localhost dev]# cat /proc/filesystems nodev sysfs nodev rootfs nodev bdev nodev proc nodev sockfs nodev binfmt_misc nodev debugfs nodev usbfs nodev pipefs nodev futexfs nodev tmpfs nodev eventpollfs nodev devpts ext2 Linux用的文件系统 nodev ramfs nodev hugetlbfs iso9660 光盘片用的文件系统 nodev mqueue nodev selinuxfs nodev rpc_pipefs nodev autofs autofs 光盘、软盘的自动加载 vfat |
Solaris 的/proc下没有filesystems,全是进程文件
最简单的mount "dos/win分区"步骤
1. Fdisk -l [root@localhost macg]# /sbin/fdisk -l Disk /dev/hda: 80.0 GB, 80026361856 bytes 255 heads, 63 sectors/track, 9729 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device |
2. mount [root@localhost macg]# mount -t vfat /dev/hda6 /mnt/d D盘为什么是6,因为是扩展分区上的逻辑分区 ,逻辑分区都大于4 |
[root@localhost macg]# ls /mnt/d avi game military temp CloneCD.v5.2.1.1.rar ghostmp3cdmaker.rar Nero_6.6.1.4.zip The.Hot.the.Cool.&_.the.Vicious.1976.dvdrip.cd2.avi Diablo |
umount卸载的参数要针对文件系统(filesystem),而不是mount
point
umount
/dev/hda6
mount 软盘
#mount -t ext2 /dev/fd0 /mnt/fd |
注意在取出软盘之前要unmount
/mnt
否则会导致信息丢失
注意mount光驱,不能用-t vfat/ext2,要用-t
iso9660
# mount -t ext2 /dev/cdrom /mnt/c mount: block device /dev/cdrom is write-protected, mounting read-only mount: wrong fs type, bad option, bad superblock on /dev/cdrom, missing codepage or other error In some cases useful info is found in syslog - try dmesg | tail or so # mount -t vfat /dev/cdrom /mnt/c mount: block device /dev/cdrom is write-protected, mounting read-only mount: wrong fs type, bad option, bad superblock on /dev/cdrom, missing codepage or other error In some cases useful info is found in syslog - try dmesg | tail or so |
# mount -t iso9660 /dev/cdrom /mnt/c mount: block device /dev/cdrom is write-protected, mounting read-only # ls /mnt/c stuck |
redhat下,真正的光驱设备文件是设备文件,其他的都是链接
# ls -l crw------- 1 root root 10, 134 Feb 7 2007 apm_bios crw------- 1 root root 14, 4 Feb 7 2007 audio lrwxrwxrwx 1 root root 3 Feb 7 2007 cdrom -> hdb lrwxrwxrwx 1 root root 3 Feb 7 2007 cdwriter -> hdb crw-rw---- 1 root root 5, 1 Feb 7 2007 console lrwxrwxrwx 1 root root 3 Feb 7 2007 dvd -> hdb lrwxrwxrwx 1 root root 3 Feb 7 2007 dvdwriter -> hdb brw-r----- 1 root disk 3, 9 Feb 7 2007 hda9 brw-rw---- 1 root disk 3, 64 Feb 7 2007 hdb |
看dmesg [root@localhost dev]# dmesg hdb: ATAPI 48X DVD-ROM DVD-R CD-R/RW drive, 2048kB Cache |
写保护错误write-protected,但仍旧mount上(read-only)
[root@localhost xinetd.d]# mount -t iso9660 /dev/cdrom /mnt/c mount: block device /dev/cdrom is write-protected, mounting read-only |
[root@localhost xinetd.d]# mount -t iso9660 /dev/dvdwriter /mnt/c mount: block device /dev/dvdwriter is write-protected, mounting read-only mount: /dev/dvdwriter already |
linux 下没什么虚拟光驱的操作,直接mount iso
文件即可
[root@localhost ymp]# mount -o loop RHEL4-U4-i386-AS-disc1.iso /mnt/d/disk1 |
[root@localhost ymp]# ls /mnt/d/disk1 autorun RELEASE-NOTES-bn.html RELEASE-NOTES-U1-it.html RELEASE-NOTES-U2-ta.html RELEASE-NOTES-U4-en.html EULA RELEASE-NOTES-de.html RELEASE-NOTES-U1-ja.html RELEASE-NOTES-U2-zh_CN.html RELEASE-NOTES-U4-es.html GPL |
mount iso 文件,必须加 -o loop参数
[root@localhost mnt]# mount /mnt/d/ymp/RHEL4-U4-i386-AS-disc1.iso
/mnt/cd
mount: /mnt/d/ymp/RHEL4-U4-i386-AS-disc1.iso is not a block device
(maybe try `-o
loop'?)
mount 后的iso文件和光盘一样,也是只读的
[root@localhost cd]# chmod +w isolinux/isolinux.bin
chmod: changing permissions of `isolinux/isolinux.bin': Read-only
file system
mount U盘
USB U盘和USB硬盘的对应设备文件和scsi
设备重名
都是/dev/sda
/dev/sdb /dev/sdc
新redhat,插上U盘后,linux自动找到USB设备,可以通过fdisk -l查到
[root@mail home]# /sbin/fdisk -l
Disk /dev/hda: 10.0 GB, 10005037568 bytes Device Disk /dev/dm-0: 9294 MB, 9294577664 bytes Disk /dev/dm-0 doesn't contain a valid partition table Disk /dev/dm-1: 536 MB, 536870912 bytes Disk /dev/dm-1 doesn't contain a valid partition table Disk /dev/sda: 128 MB, 128974336 Device |
虽然设备自动找到了,但mount还必须手工
把 fdisk -l 查到的U盘设备mount到目录中
[root@mail sbin]# mkdir /mnt/usb [root@mail sbin]# mount /dev/sda1 /mnt/usb [root@mail sbin]# ls /mnt/usb 10.wma 16.wma 5293.mp3 7406.mp3 am2-bach.wma beethoven4.wma do12.wma kisin3.mp3 11.wma 17.wma 5706.mp3 7.wma am4-bach.wma beethoven5.wma do15.wma mozart570.wma kisin25.mp3 |
solaris 如何使用usb设备
cd /dev/dsk ls -l 查看usb设备 |
mount -F pcfs /dev/dsk/设备名字 /mountpoint 跟linux不同,linux缺省类型是vfat,所以可以不设-t |