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Linux Command Line and shell script programming Daquan graphic desktop Script Programming create text menu create menu layout [plain] #! /Bin/bash clear # clear screen echo-e "\ t \ tMenu" echo-e "1. \ tDisplay disk space "echo-e" 2. \ tDisplay

first, what is a commentSpeaking of annotations, you have to mention what metadata is (metadata). The so-called meta-data is data data. In other words, metadata is descriptive data. Just like the fields in a data table, each field describes what the

1. You need to install the R,rstudio in Mac OS First, this is relatively simple, skim2. Download the compiled spark (spark-2.0.0-bin-hadoop2.6.tgz) and download it to your desired version on the Spark website.Unzip spark to the specified directory　　$

For Linux system tuning parameters, all TCP/IP tuning parameters are located in the/proc/sys/net/directory. For example, the following are some of the most important optimization parameters, which are followed by their meanings: 1./proc/sys/net/core/

Reprint: http://blog.csdn.net/liuchunming033/article/details/39080457Rotatingfilehandler Method Reference http://www.cnblogs.com/dkblog/archive/2011/08/26/2155018.htmlImport loggingFrom logging.handlers import Rotatingfilehandler#####################

Many programs have logging requirements, and the log contains information that has normal program access logs, there may be errors, warnings and other information output, Python's logging module provides a standard log interface, you can store

By default, logging prints the log to the screen with a log level of warning;Log level size relationships are: CRITICAL > ERROR > WARNING > INFO > DEBUG > NOTSET, and of course you can define the log level yourself.Print the log to the screen1

Original Technology Achievement DreamOriginal link: http://ixdba.blog.51cto.com/2895551/533740a system run levelThe Windows system has a safe operating mode and a normal operating mode, which is two different run levels, and Linux also has a system

Tagged with: deb MD5 return IGP dump named delattr cultivation SetAttrThe seventh day object-oriented advanced, object-oriented programming understanding is still somewhat difficult, but I think if you figure out, it is much easier to program

　　preprocessing is the process before compiling, and one of the tasks of compiling is grammar checking and preprocessing without grammar checking . The preprocessing command begins with the symbol "#" .Common pre-processing directives include:

#之前发的Driver.switch_to_alert () This sentence can be run through, but will pop up a warning message (this 3.x is not recommended)change to driver. Switch_to.alert would not have been.(i) PrefaceDevelopers use JavaScript warnings or modal dialogs to

There is a logging module in Python that can be used to record the relevant information, often using it in debug .1. Log LevelThe logs are divided into 5 grades, from low to High, respectively: DEBUG INFO WARNING ERROR

"Effective C + +" Chapter Nineth: Miscellaneous Discussion Do not neglect the compiler's warnings. Take a warning message from the compiler seriously. Strive for no warning at the highest warning level. Also do not rely too much on the compiler

Most of the content was excerpted from the blog http://www.cnblogs.com/Eva-J/Hashlib Module Algorithm IntroductionPython's hashlib provides a common digest algorithm, such as MD5,SHA1 and so on.What is a digest algorithm?Abstract the algorithm is

Level of LogImportLogginglogging.debug ('Debug Message') Logging.info ('Info Message') logging.warning ('warning Message') Logging.error ('error Message') logging.critical ('Critical Message') Execution Result: WARNING:root:warning messageERROR:root:

1. Disable the Configure Server Wizard: Prohibit the presence of the Configure Your Server Wizard (Manage Your server):-> Administrator tool (Administrative Tools)-> manage Your server in Control Panel (Manage Your Server), and then in the

When you open a file, you are prompted that the format of the file Xxx.xls you are trying to open is inconsistent with the format specified by the file name extension. Before opening the file, verify that the file is not corrupted and that the

V. Error handling: 1, error report processing. Programming requires consideration of the various execution of functions, as much as possible to handle all process situations. Divide a function into two categories: A type of function that is

The article suggests that Ajax and JMX are located on the two opposite sides of the system management stack. However, Ajax models are now ubiquitous in Rich browser clients. This makes the model become blurred in the architecture domain to enhance

This article aims at the MySQL database basic operation carries on the study research, needs to understand the friend not to miss this article. The following are used on the command line under Windows 64-bit operating systems. Before we learn, let'