common hand tools

voidmain (String [] args) {7Cyclicbarrier Cyclicbarrier =NewCyclicbarrier (3,NewRunnable () {8 Public voidrun () {9System.out.println (Thread.CurrentThread (). GetName () + "======");Ten Try { OneThread.Sleep ((Long) (Math.random () *10000)); A}Catch(Exception e) { - e.printstacktrace (); - } theSystem.out.println (Thread.CurrentThread (). GetName () + "======>"); - } - }); -Executorservice executorservice= Executors.newfixedthrea

? For example, hitting a (multiple) space before the print function or pressing the TAB key will cause an error when running the statement in Python-shell.>>> s = ' www.jeapedu.com ' >>> print swww.jeapedu.com>>> print s File "The reason for the 4th line error is that there is a tab or several spaces in front of the print function that causes the syntax to be out of compliance in the Shell and report an error.This article is from the "Python Training Zhipu Education" blog, so be sure to keep thi

unregistered function will be reported this error. Generally easy to distinguish, some customers may be forbidden error interface, so the test is good, one put on the server will not come out, no error interface is not easy to find.Workaround: In a formal environment where a purchase has been registered, the feature is not available if some features are not purchased.If you want to know what features you have purchased, you can open the Web server and enter it in the browser: Http://localhost:8

this can be very painful, so we will add the routing module loosely using dependency injection .First, let's extend the server's start () function to pass the route function as a parameter, and theserver.js file code is as followsvarHTTP = require ("http");varurl = require ("URL"); function Start (route) {function onrequest (request, response) {varpathname =Url.parse (request.url). Pathname; Console.log ("Request for"+ Pathname +"received."); Route (pathname); Response.writehead ( $, {"Cont

Status Series Mysql provides a series of commands to obtain the running status of the database. The most common commands are show status, show innodb status, show processlist, and show mutex status. Through these commands, we can learn the database and storage engine I/O, memory, locks and other details. References: http://wiki.babel.baidu.com/twiki/bin/view/Com/Ns/Mysqlstatus Monitoring Tool-Mysqlreport The various status commands listed above can be

geo-software such as Google Earth, and easily query the Path/row information for the corresponding region. For example: I want to query the Beijing city to use the Landsat8 path/row information, you can download to the global grid KML file loaded into Google Earth, and then locate in Beijing city, click the left mouse button to display the area of the Path/row (123/ 32) and other information (Figure 3). Figure 3 Query area based on the KML file loaded onto Google Earth Path/row4. WRS-1/2 Path/r

Mysqlslowlog is a log tool used to record SQL statements with a long execution time (beyond long_query_time seconds. you can enable slowlog in either of the following ways: 1. in cnf, log-slow-queries [file_name] 2 is used to specify the log mysql management tool when the mysqld process is started. Mysql slow log is a log tool used to record SQL statements with a long execution time (beyond long_query_time seconds. Enable slow log There are two activation methods: 1. in my. cnf, log-slow-q

(times per request):Calculation formula: The amount of time spent processing all requests (total number of requests/concurrent users), i.e.:Time per request=time taken for tests/(complete requests/concurrency level)3. Average Server request Wait time (Request:across all concurrent requests):Calculation formula: The amount of time/Total requests processed to complete all requests, namely:Time taken For/testscomplete requestsAs you can see, it is the reciprocal of the throughput rate.It also equa

Npm:node Package Manager, node. JS SuiteManagement tools like:Pear is a PHP suite management tool (can be used to install PHP modules)PPM is a Perl suite management tool (can be used to install the Pear module)Pip is a Python Suite management tool (can be used to install Python modules)Perl-like ppm or PHP pear after installing NPM, use the NPM install module_name command to install the new kitNPM allows node. JS developers to leverage and expand the

/research/programs_data/toolbox.htmgibbslda++http://gibbslda.sourceforge.net/Gldahttp://code.google.com/p/glda/*conditional Random FieldsFlexcrfshttp://flexcrfs.sourceforge.net/Contains MPI parallel versions.crf++http://crfpp.sourFceforge.net/CRF Packagehttp://crf.sourceforge.net/CRF MatlabHttp://www.cs.ubc.ca/~murphyk/Software/CRFall.zipCrfsuithttp://www.chokkan.org/software/crfsuite/SGD with CRFHTTP://LEON.BOTTOU.ORG/PROJECTS/SGDHcrfhttp://sourceforge.net/projects/hcrf/*support Vector MachineL

common tools for Linux system monitoring I. System core Toolkit (COREUTILS)1./BIN/DF report The disk space usage of the system df-h display the disk partition fdisk-l2./bin/uname Display System Information UNAME-SRVMOTwo. System Process Toolkit (PROCPS)1./bin/ps Display system process ps-ef PS aux2./USR/BIN/PGREP Filtering Display System process3./usr/bin/free display of system memory usage4./usr/bin/vmstat

The idea of penetrating attacks is generally to scan for vulnerabilities and then exploit different vulnerabilities to attack penetration.Vulnerability Scanning Tool has nessus, the tool can be at the same time on the local or remote control, the vulnerability analysis of the system scan. Nessus a system vulnerability can be scanned by creating a new scan policy and adding a corresponding plug-in.Another vulnerability scanning Tool is OpenVAS, which is not described here.The above describes the

1. PrefaceThis article collects or records the tools used in the process of work, to facilitate themselves, to share with the people.2. Test environmentCentOS Release 6.5 (Final)3. Introduction of tools3.1, Tcpdump3.1.1, functionListen to a port and grab a packet3.1.2, installationYum-y Install Tcpdump3.1.3, usage examplesTcpdump Port 21-na3.2, Nmap3.2.1, functionScan the service port opened by a host3.2.2, installationYum-y Install Nmap3.2.3, usage e

Written in front of the words: see the results of today's system home is very proud, because I and the family of the system to grow together, in the system house there is a kind of atmosphere = = Mutual solidarity, mutual supervision, common progress = = This is the system of home management culture. In the Forum not for pure irrigation, But in order to learn knowledge to make friends. Here I only represent the system house thanks to the members and f