# cat /etc/mtab
/dev/sda4 / reiserfs rw,noatime 0 0
proc /proc proc rw,nosuid,nodev,noexec 0 0
sysfs /sys sysfs rw,nosuid,nodev,noexec 0 0
udev /dev tmpfs rw,nosuid 0 0
devpts /dev/pts devpts rw,nosuid,noexec 0 0
/dev/sda2 /boot ext2 rw,noatime 0 0
shm /dev/shm tmpfs rw,noexec,nosuid,nodev 0 0
/dev/sda1 /mnt/winxp ntfs rw,utf8,umask=0 0 0
usbfs /proc/bus/usb usbfs rw,noexec,nosuid,devmode=0664,devgid=85 0 0
/dev/sdb5 /media/SWAP vfat rw,nosuid,nodev,shortname=lower,uid=1000 0 0
LinuxGem
此处为老的 LinuxGem，新版 LinuxGem 请移步 www.linuxgem.org
fstab 和 mtab 的区别
fstab 文件想必大家都很熟悉，记录了计算机上硬盘分区的相关信息，启动 Linux 的时候，检查分区的 fsck 命令，和挂载分区的 mount 命令，都需要 fstab 中的信息，来正确的检查和挂载硬盘。
除了 fstab 文件之外，还有一个 mtab 文件，和 fstab 文件一样在 /etc 文件下，位于 /etc/mtab ，这个文件又是干什么用的呢？
我们可以看一下 mtab 文件的内容 (这是我电脑上的 mtab 文件内容)：
每当 mount 挂载分区、umount 卸载分区，都会动态更新 mtab，mtab 总是保持着当前系统中已挂载的分区信息，fdisk、df 这类程序，必须要读取 mtab 文件，才能获得当前系统中的分区挂载情况。
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