obtained, and then a similar method can be obtained to a random number. Digression: In the program, we often MD5 get a unique value, and then the string, if you want to represent the integer mode, you can pass the CRC function. CRC is a cyclic redundancy check, the same data through the operation, will get a series of integer data. This validation is now widely used. Detailed to understand, you can refer to: CRC.
Here's another way to read the generated
唯一的表示整型数据,只有文件内容不变,生成结果就不会变化,与php crc函数[[emailprotected] shell]$ head-200 /dev/urandom| cksum | cut-f1 -d" "484750180#cut 以” “分割,然后得到分割的第一个字段数据
Get the integer data, and then a method like one can get to the random number. Digression: In the program, we often MD5 get unique values, and then the string, if you want to represent an integer mode, you can pass the CRC function. CRC is cyclic redundancy check, the same data through the operation, will get a string of integer data. Th
, refer to: CRC.
Here's another way to read the generated UUID code directly from the device.
4, read the Linux UUID code
Before mentioning this, there is a concept of what is a UUID?
The UUID code is the Universal Unique identifier (universally unique Identifier
Last week in doing the expansion of the log machine, found that yun-dimensional students will be a hard disk mount point is not consistent with the previous log machine, considering this will bring trouble to future maintenance, and then try to modify, at the same time, review the log machine before the Mount configuration, found that there is a chance to drop the pit at any time ... As for what pits, I wil
Linux Mount management and linux Mount Management
Overview
In the previous chapter, the mount command has been used to mount partitions in the linux operating system space. This chapte
integer data. Then, a method similar to one can obtain the random number. Topic: in the program, we often obtain the unique MD5 value, followed by a string. If you want to represent it as an integer, you can use the CRC function. CRC is a cyclic redundancy check. When the same data is computed, a string of integer data is obtained. Currently, this verification is widely used. For more information, see CRC.
The following method reads the generated UUID
mountCODEPAGE=XXX code pageIocharset=xxx Character SetRO mount in read-only modeRW mount in read-write modeRemount Reinstall a file system that has already been installedLoop mount "cyclotron device" and "ISO image file"Note that the mount point must be a directory that already exists, this directory may not be empty,
Tags: prompt to automatically update mount share FFFFFF def will automatically load the appin the Linux operating system, the Mount command is used to load the file system to the specified mount point. This command is most commonly used to mount CDROM so that we can access t
Linux is an excellent open-source operating system, can run in large-to-small to the palm of a variety of computer systems, with the growing maturity and stability of Linux systems and its unique advantages of open source code, Linux in the world has been more and more widely used. Nowadays, many enterprises ' computer systems are mixed systems composed of UNIX s
This article describes the use of the Mount command, as well as tips on how to image files, removable hard disks and USB drives.Hook up Command (Mount)First of all, describe the use of the Mount command, the Mount command parameters are very many, here is the main talk about what we are going to use today.Command form
If you want to access resources in other file systems under running Linux, you will use the Mount command.2. What is the basic usage of mount?Format: Mount [-parameter] [device name] [Mount Point]Among the parameters commonly used are:-A installs all file systems that are cl
Linux mount (Mount) disc image files, removable hard disks, USB drives, Windows and NFS network sharesLinux is an excellent open-source operating system, can run in large-to-small to the palm of a variety of computer systems, with the growing maturity and stability of Linux systems and its unique advantages of open sou
Linux mount command mount usage and parameter details
Guide
Mount is a command under Linux that can attach a partition to a folder in Linux, thereby linking the partition to that directory, so that we access
Linux mount command mount usage and Parameter DetailsGuideMount is a command in Linux. It can mount a partition to a folder in Linux to associate the partition with the directory. Therefore, we only need to access this folder, thi
Linux mount (Mount command) detailedOriginal: http://tutu.spaces.eepw.com.cn/articles/article/item/70737Hook up Command (Mount)First of all, describe the use of the Mount command, the Mount command parameters are very many, here i
Mounting is the operation of combining a file system with a directory. A mount point is a directory, which is the entry into a partition or file system.I. Precautions before MOUNTING:1, a single file system should not be repeatedly mounted on different mount points.2. A single directory should not repeatedly mount multiple file systems.3, the directory is about t
form of 8-4-4-4-12 32 characters. 550e8400-e29b-41d4-a716-446655440000, so: The total number of UUID in theory is 216 x 8=2128, approximately equal to 3.4 x 1038. That is, if you produce 1 trillion uuid per second, it will take 10 billion years to run out of all the UUID.In fact, we do database design time, must have heard, GUID (Global unique identifier) code, it is actually similar to the
The Linux mount command is a frequently used command that mounts files outside of the Linux system.
Grammar
Mount [-HV]
mount-a [-FFNRSVW] [-t Vfstype]
Mount [-FNRSVW] [-O options [,...]] device | Dir
Hook up Command (Mount)First of all, describe the use of the Mount command, the Mount command parameters are very many, here is the main talk about what we are going to use today.Command format: Mount [-t vfstype] [-O options] Device dirwhich1.-t vfstype Specifies the type of file system that is not normally specified.
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.