sonet systems

Personal opinions on the development of Unix-like systems-general Linux technology-Linux technology and application information. The following is a detailed description. Original Author: esinhee First of all, I want to emphasize that I am not here to start a verbal war. My friends who like my mother-in-law are not welcome yet. I am just talking about my immature ideas. Don't be honest with me; no matter what you do, check yourself first. I don't kno

Overview of the evaluated algorithms for the personal recommendation systems As the name suggests, this Chinese paper describes the evaluation method of the recommendation system, that is, how to evaluate the advantages and disadvantages of a recommendation system. Introduction 1. Establish a Personalized Recommendation SystemUserAndProductBased on the user's existing selection process or similarity relationship, this module mines the objects tha

I,Windows MobileOperating System of Series Mobile phones Windows Mobile operating systems are changed on Microsoft's Windows operating system. Therefore, their operating interfaces are very similar, A friend familiar with Windows operating systems generally recognizes windows mobile operating systems as Microsoft. Most windows mobile operating

MIMO technology can be used as a bridge to connect old and new wireless technologies, so that the two can develop and integrate harmoniously. So it is already an important technology in the next generation of wireless broadband mobile communication systems. The following will give you an in-depth analysis of its development. MIMO technology has become one of the key technologies in the wireless communication field. However, it is a huge challenge in t

row + while(Sc.hasnextint ()) { ASystem.out.println ("Next integer is:" +sc.nextint ()); at } - } -}Third, the System class:In layman's words: If you want to get data on the system where the operating platform is related to/JVM , use the systems class.In-standard input, usually the standard input is the keyboardOut-standard output is usually the screenCommon methods:Exit (in status): Exits the virtual machine, regardless of wheth

loading of applications on file systems as processesDev/nodev: Whether to support the use of device files on this file systemRO: Read-only, RW: Read/writeUser/nouser: Whether to support normal user mount this deviceDefault mount options:1, defaults:Async,rw,dev,exec,auto,nouserUninstall command: Umount/mount_printUmount DEVICETo view the processes that are accessing this file system:Fuser-v/mount_print-KM: Aborts all directories that are accessing th

11.1 What to do first11.2 Error AnalysisError measurement for class 11.3 skew11.4 The tradeoff between recall and precision11.5 Machine-Learning data11.1 what to do firstThe next video will talk about the design of the machine learning system. These videos will talk about the major problems you will encounter when designing a complex machine learning system. Also try to give some advice on how to cleverly build a complex machine learning system. The following course tells you something that is n

The basics of the Korn shell commonly used on IBM AIX operating systems are described in more detail in the guide.Korn the order in which the shell executes commands1. Keywords, such as if,for,function, etc.2. Aliases (Aliases)3. Internal commands, such as CDs, whence and functions4. Function functions5. Script scripts, executable program in Path※ Locate the root of the command with the following command:Whence-v commandOr:Type commandAlias (aliases)A

Linux Systems-User management-related profiles a configuration file 1 User information file:/etc/passwd 2 Password file:/etc/shadow 3 User group information file:/etc/group 4 User group password file:/etc/gshadow 5 User profiles:/etc/login.defs/etc/default/useradd 6 information files for new users:/etc/skel 7 Login information files:/ETC/MOTD and/etc/issue two my_qq 872785786 and the corresponding network disk data link: Http://pan.baidu.com/s/1ydewA

Linux Systems-User Management-Administrator authorization The root privilege of a Linux normal user 1 often used to manage some services need some permissions, you can edit in the Visudo User name Host address = absolute path (to restrict permissions so that users can execute the program only under these paths, without root privileges) 2 can be used for Web site management services and so on, and Linux system backdoor intrusion two my_qq 872785786 and

Linux Systems-File system-disk quotasa simple definitionLimit the amount of space a user's disk usestwo opening process1 Edit the/etc/fstab file, add the flag Usrquota or Grpquota on the Mount attributenamely/dev/sdb1/home ext3 defaults Usrquota 1 2can also be temporarily set: Mount-o remount,usrquota/home2 Build Quota database: Quotacheck-cvuga generates Aquta.user or Aquota.group two files3 Boot quota: Quotaon partition name close Quotaoff partition

Linux Systems-Process management-Scheduled Tasksa Scheduled Task command1 at a time to perform a task2 Batch executes when the system load is not heavy3 Cron Periodic executiontwo at command and use1 at [-f filename] Time2 at [-D Delete Task]3 at [-l View Task]4 Absolute Timekeeping method: hh:mm mm/dd/yy at 17:30 4/18/155 Interactive mode: at 9:00AM6 How to use the command file: Generate file At.script using the AT commandat-f at.srcipt 9:00am 4/18/1

Achieving the goal: in a virtual machine 2 Desk Linux System, 2 client to communicate, and can use the host name Ping PassExperiment Preparation: 1. 2 Linux Systems in the virtual machine , one win7, one win20082.linuxA and the LINUXB as a 2 router, Win7 and the win2008 as a 2 -Side Client3.2 Desk Linux Add a network card deviceIntroduction: This experiment uses Cisco routing switching technology.The access path to the experiment we are implementing

Let's start by talking about the use of a disk:The use of the disk must be formatted, the first to start with a low-level format, that is, dividing tracks, sectors and so on.Later, you have to partition, create the file system, and then mount (that is, a directory associated to/below as the Access portal).That is:Low-level formatting (tracks, sectors)---> Partitioning---> Creating file Systems---> MountingHere, by the way, the root partition becomes t

support, which means that the device supports power-saving and restores from power-saving or off-state, and on the other hand, these device drivers must be able to receive supply management instructions. At present, the system hangs the main obstacle is those not too perfect drivers, such as USB, video card, sound card driver.Of course, now the Linux core support for the system hangs to be improved, mainly in: SMP systems are not supported.

http://blog.csdn.net/pipisorry/article/details/44850971Machine learning machines Learning-andrew NG Courses Study notesRecommender Systems recommendation System{An important application of machine learning}Problem formulation Problem PlanningNote:1. To allow 0 to 5 stars as Well,because This just makes some of the math come out just nicer.2. For the example, I have loosely 3 romantic or romantic comedy movies and 2 action movies.3. To look through the

, and can print the matching file or text information, which can save a lot of time.In addition, regular expressions are important to system administrators! Because the system does not fill out will produce a lot of information, some of the important information is only to inform, at this time, the administrator can through the formal expression of the function to print out important information, and produce easy to consult the report to simplify the management process.Third, how to correctly us

-name}/queue/schedulerecho NoOp >/sys/block/hda/queue/schedulerrecommendations for the use of IO schedulingDeadline I/O Scheduler uses a polling scheduler, simple and compact, providing minimal read latency. Good throughput, especially for reading more environments (such as databases, Oracle 10G, etc.).anticipatory I/O Scheduler assume that a block device has only one physical lookup head (such as a single SATA hard disk), merging multiple random small write streams into an uppercase stream, wit

Troubleshooting and remediation techniques for Linux systemsAny operating system has a failure, the Linux system is no exception, during the boot process may have some problems, resulting in the system does not start properly. This article from the single user mode, Grub command operation, Linux Rescue mode Three aspects of the analysis of troubleshooting and repair cases, to help you solve such problems.AD:2014WOT Global Software Technology Summit Beijing Station course video releaseI found tha

_nameJar_name= $SERVICE _name\.jarPid= $SERVICE _name\.pidCD $SERVICE _dirCase "$" inStartNohup $JRE _home/bin/java-xms256m-xmx512m-jar $JAR _name >/dev/null 2>1 Echo $! > $SERVICE _dir/$PIDecho "= = = Start $SERVICE _name";;StopKill ' Cat $SERVICE _dir/$PID 'RM-RF $SERVICE _dir/$PIDecho "= = = Stop $SERVICE _name"Sleep 5### # Edu-service-aa.jar# # Edu-service-aa-bb.jarP_id= ' Ps-ef | Grep-w "$SERVICE _name" | Grep-v "grep" | awk ' {print $} 'If ["$P _id" = = ""]; Thenecho "= = = $SERVICE _name