operations management for dummies

=float.parsefloat (Br.readline ());Em.updatesal (EmpNo, newsal);}else if (Opertype.equals ("4")){System.out.println ("Please enter Number:");String Empno=br.readline ();Em.delemp (EmpNo);}else if (Opertype.equals ("5")){System.exit (-1);}}}}Class empmanage{Private ArrayList Al=null;Public Empmanage () {Al=new ArrayList ();}public void Addemp (EMP emp) {Al.add (EMP);}public void Showinfo (String empNo) {Traverse Arraylsitfor (int i=0;iEMP emp= (EMP) al.get (i);if (Emp.getempno (). Equals (EmpNo))

#service sshd Restart$ssh [email protected] (client trial login, if not prompted to enter the user name password to verify success7. Tcapwrappersconfiguration files:/etc/hosts.allow,/etc/hosts.denyPolicy format: Service list: Client address Listpolicy wording: The list of services and the list of client addresses are separated by commas, and the network segment representation method:192.168.1. or 192.168.1.0/255.255.255.0; Domain name representation method:. baidu.com or *.baidu.comapplication r

LoginCHPASSWD Tools for batch update of user passwordsGRPCK used to verify the integrity of a group fileCHSB used to replace the shell used when logging in to the systemGPASSWD management tools for workgroup files under LinuxPwck used to verify the contents and format and integrity of system authentication filesNewUsers for batching How to create multiple commands at onceLogName used to display user namesGroups used to print the workgroup to which th

I. Overview After you select a cloud server (as shown in the blue box), the console displays which management actions are available based on the current state of the cloud server: as shown in the red box, the current machine is in a running state, so you can stop, restart, and modify the password. The basic management operations of the cloud server are: Start, s

status of all nuclear CPUs 1Press the Q key to exit topTop-c (View the process global path)TOP-BN1 (one-time output all information of all processes, non-dynamic display, suitable for writing scripts)SAR (Monitoring the status of almost all resources in the system)SAR command to add options (parameters)(information is obtained once every 10 minutes)(1)Install First: Yum install-y sysstat(2) Sar-n DEV view NIC Traffic daSar-n DEV 1 5 displays each second, showing 5 ends(When RXPCK to 1w, or RXKB

- Aop:aroundMethod= "Arount"Pointcut-ref= "POINTCUT1"/> Aop:aspect> Aop:config>Beans>4. Testing PackageCom.junit;Import Staticorg.junit.assert.*;Importorg.junit.Test;ImportOrg.springframework.context.ApplicationContext;ImportOrg.springframework.context.support.ClassPathXmlApplicationContext;ImportCom.ioc.User; Public classText {@Test Public voidTest () {//load Spring configuration fileApplicationContext context =NewClasspathxmlapplicationcontext ("Bean2.xml")

in reverse order (originally alphabetical order) -T List the files in the order of establishment time -S Display the size of each file allocation in blocks -S Sort by file size Different types of files have different colors in the Linux system, and the meanings of these colors are as follows: Green: Represents the executable file. Red: Represents the compressed file. Dark blue: Represents the directory. Yello

-retrieve the administrator password:#service mysqld Stop#vim/etc/rc.d/init.d/mysqld$bindir/mysqld_safe--skip-grant-tables--skip-networking--datadir= "$datadir"--pid-file= "$mysqld _pid ... (Add --skip-grant-tables Bypass authorization table and --skip-networking prohibit network connection)#service mysqld Start#mysql>update mysql.user SET password=password (' New_password ') WHERE user= ' root ';( You cannot change the password with SET and mysqladmin only by manually changing the contents of t

ADODB. Stream is a stream object of ADO. It provides access to binary data or text streams to implement stream read, write, and management operations. There are the following methods:Cancel MethodThe usage is as follows:Object. CancelDescription: cancels the call of an asynchronous execute or open method suspended for execution.Close MethodThe usage is as follows:Object. Close: Close the objectCopyto Metho

)Switch the running Task window (press the shortcut key Win+tab, or ALT + TAB)Quick Lock Screen (press the shortcut key Win+l)Win Settings (press the shortcut key Win+i)8, Win+r fast CallWin+r can get the Run dialog boxQuickly call Notepad, draw, calculator from the Run windowNotepad (Notepad)MSPaint (Drawing)Calc (Calculator)9, "Run" Quick call cmd command Line window operation method: win+r input cmd plus commandhostname commandipconfig commandView the Internet address (IP address) of this com

Recently, I used vs2008 + SQL Server 2005 for development. To use stored procedures that have not been used before, I found some basic operations on the stored procedure and kept files for use. Create a stored procedure In the object Resource Manager, connect to the SQL Server 2005 database engine instance and expand the instance. Expand"Database"The database to which the stored procedure belongs and"Programmable". Right-click"Stored Procedure"A

Yesterday in the virtual machine installed CentOS 7 o'clock selected Gnome mode installation, boot default into GUI mode. Search online to modify the default command-line mode method, see said to modify the/etc/inittab file, at the lowest next line to addID:3But usingCat /etc/inittabcommand to view the Inittab file, you can see the following:The contents of the first red box indicate that Inittab is no longer in use.The second red box shows two boot modes: Multi-user.target and Graphical.target

unit elements have hot or cold backups? What is the period of backup and how long is the recovery time? If the local people can not solve the problem, who can contact the support is who, how long can be present? Is there an operational process plan for the internal operation? Wait, wait.From top to bottom risk awareness, such as can be reflected in the "test", this is the best thing, hardware and software investment in the "test" effect as one of the considerations.A small article written in 20

, design patterns and so on. Error handling is also important after you have finished writing the program.Code review can be self-reviewed, or peer reviewed. However, the efficiency of self-review is not high, this time the two teams of another person will take up this responsibility, and software engineering, the most basic means of review is peer review. The purpose of code review is: 1, find out the error of the code itself, 2, find the logic, the error of the algorithm, 3, the detection of p

point of the master Branch at the moment does not change:Now, we merge the work of the Dev branch onto the master branch, using git merge dev the command to merge the specified branch dev to the current branch master, and then view README.txt to see the latest commit of the dev branch:Now the branching situation is like this:In effect, the merge is done by pointing master directly to the current commit of Dev.Delete BranchAfter you merge the branches, you can even delete the dev branch. Using t

Course connection: Linux file basic operations management copy file and directory cp Source File (folder) target File (folder) if copied in the same working directory need to be renamed. Course connection: Basic Linux File operation managementCopy files and directories Cp Source File (folder) target File (folder) You need to rename a copy in the same working directory.-R copy folder-v shows how to move t

Simple File System operation$ DF//Use the DF command to view the capacity of the diskIn general, we only care about the ROOTFS in the environment or the/DEV/SDA2 on the physical host. Rootfs (Root File System) It is a special instance of Ramfs (a very simple Linux filesystem used to implement a disk caching mechanism as a dynamically resizable RAM-based file system) or TMPFS, which, as the system starts when the kernel is loaded in, A temporary file system before the real disk is mounted. The us

to all the files in the directory/* $attr = Glob ("./touxiang/*");foreach ($attr as $v){echo $v. " }*/Get the number of all files (including folders) under a folderThis method is used to get the number of files under the specified folder/*function Shuliang ($filename){$attr = Glob ($filename. " /*");$n = count ($attr);foreach ($attr as $v){if (Is_dir ($v)){$n = $n +shuliang ($v);}}return $n;}Echo Shuliang ("./0904"); *//* $fname = "./0904";$dir = Opendir ($fname); Open a directory to return to

Not all management tasks are allowed to run concurrently. In the following table, the black circle indicates that the two operations cannot run simultaneously in the database. Note: Most of the processing time of the file contraction operation is used to reassign the page to the area retained after the contraction is completed, and then try to change the file size to the size of the

/local/apache2 directory new www folder, in The root directory for the new three virtual hosts under the WWW folder Nice1,nice2 and nice3:cd/usr/local/apache2mkdir wwwcd wwwmkdir nic1 nice2 nice3(ii) Use the echo command to generate a index.html file in the root directory of three virtual hosts:Echo " This is Nice1, welcome. "> nice1/index.htmlecho"Thisis Nice2, welcome. "> nice2/index.htmlecho"Thisis Nice3, welcome. "> nice3/index.html(4) Modify the/usr/local/apache2/conf/httpd.conf file to a