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Assigning values to variablesDefining an integer class using Declare-i[[email protected] scripts]# Aa=5+6[[email protected] scripts]# echo $aa 5+6[[email protected] scripts]# declare-i Aa[[ema Il protected] scripts]# aa=5+6[[email protected] scripts]

Create multiple catalogs at once[Email protected] tmp]# mkdir-p/user/{folder1,folder2,folder3} [[email protected] tmp]# Ls/user/folder1 Folde R2 Folder3Find the largest 10 directories in the root directory and sort them from large to small by using

1. Review the processFirst, use W to view the process:[Email protected] ~]# w 05:22:23 up Min, 2 users, load average:0.00, 0.02, 0.06USER TTY from [EMA Il protected] IDLE jcpu PCPU whatchenyr tty1 : 0 05:08

Bo main name: Li ChangmingPost Address: http://keep88.blog.51cto.comThis note is from the old boy books: Learn Linux OPS Shell programming with old boysThe advanced and practice of shell variable knowledge1. Special positional parameter variables in

User creation, modification, deletionFirst, user-createdUseradd Usermod UserdelUseradd: Creating User: Create a new user or update default new user informationuseradd [Options] ... LOGIN-u,–uid: Specifies the UID of the new user-O, with-u use, does

The path to LINUX explorationThe path to LINUX discovery table of Contents 1 Preface 2 configuration 2.1 Vim 2.2 Emacs 2.3 Input Method Configuration 2.4 Bash 2.5 Ag and Percol 2.6 git 2.7

First set up the basic environment, assuming there is already a Python operating environment. Then need to install some common basic library, such as NumPy, scipy for numerical calculation, pandas for data analysis, Matplotlib/bokeh/seaborn for data

With two machines, both LAN, two machines can communicate with each other without problems, the middle of no firewall. The two machine IPs are: a:192.168.1.240 b:192.168.1.102 assume that the ssh of a b machine allows root login to upload a/root/abc.

" Introduction "grep: A powerful text-search tool that uses regular expressions to search for text and print matching lines"Grep common usage"[[email protected] ~]# grep [-ACINV] [--color=auto] ' search string ' filenameOptions and Parameters:-A:

First, some conceptsSecond, SELinux statusIii. related applicationsIv. Related OrdersFirst, some concepts1. Linux Secure access modelDAC (discretionary access control): Autonomous access controls2. SELinux Secure access mechanismSELinux is a secure

Due to the frequent need to send and receive e-mail, such as daily (week) Work reports, test reports, monitoring alarms, timing reminders and so on, most of the e-mail sent in the form. This article will implement a Python e-mail sending class that

Recently do a project, the environment is struts2.3.16,spring3.0,mybatis2.3When I used jquery's Ajax method to submit a request to return an object, I ran into a memory leak that bothered me for one weeks:Start calling Ajax methods, the reaction is

Copy Code code as follows: String sql = "Select Count (ID) as Rcount from Tbproduct WHERE ClassID in (" + IDs + ") and PRODUCTNAME like '% ' + @ProductNam e+ '% '; oledbparameter[] sps = new OLEDBPARAMETER[1]; Sps[0] =

Oracle:oledb Resource (session) pooling by Eric Ma EMa@ompus.jnj.com Database connectivity is a prerequisite to today's dynamically generated Web pages. However, connection to databases are one of the most expensive operations one does from within

Tp-link wr-740n routers to hide WiFi names First log on to the wireless router. The way is to open your IE browser. Enter 192.168.1.1 in the Address bar (most of the routes on the market are this address, individual manufacturers will be different,

First, the preparatory work Prepare a centos7.4 system. Shutting down firewalls and SELinux [[email protected] ~]# systemctl stop firewalld.service[[email protected] ~]# systemctl disable Firewalld.service[[email Protected] ~]# Vim/

Applets in the Java language (Java applets) and application (Java applications) are two different ways of programming that differ greatly in structure and functionality. Applets are applied to Web pages to make colorful page effects and to Tim the

1 The use of great wisdom, can only see the market index, do not see the latest market or K-line dataA: 1. Check if great wisdom is online, if not wired.2. Delete x:dzhintetnet Cpipdata folder and login again 2 Big Wisdom Font display confusion, a

Deploy social networking site case overviewThe company's social networking site in the PHP language development, in order to manage the code developed by PHP programmers, the senior leaders asked to build SVN server version control. The first

Spring annotation uses examples.As with the XML configuration example: http://www.cnblogs.com/HD/p/3962541.html Project structure: Configuration file: Springcontext.xmlXML version= "1.0" encoding= "UTF-8"?>Beansxmlns=