Disk management, mounting a disk, attaching a disk image file, mounting a USB flash drive, umount command, dd
1 mount
Command Format:
Mount [-t vfstype]-o options device dir
Where:
*-T vfstype specifies the type of the file system, which is usually not required. Mount automatically selects the correct type. Regular
Use types:
CD or CD image: iso9660
DOSfat16 File System: msdos
Windows 9x fat32 File System: vfat
WindowsNT ntfs file system: ntfs
MountWindows file network sharing: smbfs
Network Sharing for UNIX (LINUX) files: nfs
*-O options is used to describe the mounting method of a device or file. Common parameters include:
Loop: used to connect a file to the system as a hard disk partition.
Ro: mounting a device in read-only mode
Rw: mounting a device in read/write mode
Iocharset: Specifies the character set used to access the file system
* The device to mount.
* Mount point of the dir device on the system ).
2. Attach a CD image file
Thanks to the huge advances in disk technology in recent years, new computer systems have been configured with large-capacity disk systems. In Windows, many people are used to making software and materials into CD image files and using them through virtual optical drives. doing so has many advantages:
1. Ease the wear and tear of the optical drive;
2. Currently, the hard disk capacity is huge, which is not a problem for storing a disk image file. It is very convenient to call it;
III. the read speed of the hard disk is higher than the read speed of the disc, and the cpu usage is greatly reduced. in fact, it is more convenient to create and use a CD image in a Linux system than in a Windows system. You do not have to borrow any third-party software package.
1. Create an image file from the CD. Put the CD into the optical drive and execute the following command.
# Cp/dev/cdrom/home/sunky/mydisk. iso or
# Ddif =/dev/cdrom of =/home/sunky/mydisk. iso
Note: You can execute any of the above commands to make the current CD in the optical drive into a CD image file/home/sunky/mydisk. iso
2. Make the file and directory into a CD image file and execute the following command.
# Mkisofs-r-J-V mydisk-o/home/sunky/mydisk. iso/home/sunky/mydir
Note: This command will make all the directories and files under the/home/sunky/mydir Directory into a CD image file/home/sunky/mydisk. iso, and the disc volume is marked as mydisk.
3. mount the disk image file)
# Mkdir/mnt/vcdrom
Note: create a directory for mountpoint)
# Mount-o loop-t iso9660/home/sunky/mydisk. iso/mnt/vcdrom
Note: You can use/mnt/vcdrom to access all files in the disk image file mydisk. iso.
2 hanging on USB flash drive
1. Check the name of the storage device
Sudofdisk-l
2. Mount the storage device sdb1 to the mount point/mnt directory
Sudomount/dev/sdb1/mnt
3. Access/mnt
4. Uninstall/mnt
3umount uninstall command
Unmount command: sudoumount mount point
4 dd
Dd: Copy
Example 1: copy a cd (note that your CD is in the ISO format !)
Ddif =/dev/cdrom of = cdrom. iso
Example 2: copy the sfile to the dfile.
$ Dd if = sfile of = dfile
Example 3: Create a m empty file
Ddif =/dev/zero of=hello.txt bs = 100 M count = 1
/Dev/null. The nickname is a bottomless pit. You can output any data to it. It can be used without support!
/Dev/zero is an input device. You can use it to initialize the file. The data read from it is 0.