Shell

This article mainly introduces the Linux Shell Script series tutorial (vi): array and associative array, this article explained what is the array and associative array, the definition prints the ordinary array, the definition prints the associative

Through the/proc/net/dev can be viewed to the network card traffic, according to the changes in the value of the file in conjunction with while loop write a real-time monitoring network card script, by specifying the network card name as parameters

Create a scriptThere are a lot of different shells in Linux, but we usually use bash (Bourne again shell) for Shell programming because bash is free and easy to use. So the script I've provided in this article is all about using bash (but in most

The shell is also called a command-line interface, which is the interface between the user and the computer under the *nix operating system. The term shell refers to programs in the operating system that provide access to kernel services. This

In the process of server operation, often need to monitor the various resources of the server, such as: CPU load monitoring, disk usage monitoring, process number monitoring and so on, in order to alarm the system in time of abnormal, notify the

One: The role of Shell and common types: The shell is a special application that is between the operating system kernel and the user, responsible for accepting the user-entered operation instructions (commands) and interpreting them, passing the

Use the Shell to judge #!/bin/sh mypath= "/var/log/httpd/" myfile= "/var/log/httpd/access.log" #-x parameter determines whether the $mypath exists and has executable permissions if [!-X "$myPath"]; Then mkdir "$myPath" FI # Here's the-D

Use Shell to write a simple calculator, you can implement add, subtract, multiply, divide operation, if the script name is 1.sh, execute example:./1.sh 1 + 2#!/bin/bashif [ $# -ne 3 ]then   echo  "The number of parameters should be 3, for example: $0

I. Special symbols in the shellWhile you are learning Linux, you may have been exposed to a special symbol, such as "*", which is a wildcard symbol that represents 0 or more characters or numbers.Special characters that are commonly used:1, *

8.6 pipe symbol and job controlpipe: Give the result of the previous command output to the following command | SeparatedCat 1.txt |wc-l; Cat 1.txt |grep ' aaa 'CTRL Z pauses a taskJobs view the tasks in the backgroundBG [ID] Transfer tasks to the

Chapter 23rd using other shellsThe bash shell is the most widely used shell in the Linux distribution. But it's not the only option, and there are other shells you can choose from.23.1 What is dash shellBaidu Encyclopedia said: Dash Shell is a Unix

Many programs and scripts use environment variables to obtain system information, store temporary data, and configure information.6.1 What is an environment variable:Bash Shell uses a feature called environment variable (environment variable) to

Shell Features--Linux has a variety of shells to use, the default for Bash,bash has the following key features.1. Command Memory AbilityPress the up and down keys on the command line to find a pre/Post input command. These commands are recorded in ～/

#!/bin/bashExport Shell_home_path=/home/admin/test/data-integration/xldatamigrationExport LANG=ZH_CN. UTF-8Export Logs=/home/admin/test/data-integration/data/logsDate= ' date + '%y%m 'day= ' date + '%d 'Time= ' date + '%h%m%s 'If [-D

Tutorial target: DD Wipe command disk empty shell script, notebook desktop Mac UniversalDate: August 20, 2015Contact e-mail: [Email protected]Q q Group: 1851 1570151CTO Blog Home: http://990487026.blog.51cto.comProduction demand:The number of

has always been to execve what exactly do, always make confused, originally look at the design of the Linux kernel art, this part of the explanation is very not meticulous, this combination of Dr. Zhao's book, re-understand this part of the

After a few days of disk-filled events, I found myself completely unaware of DU's command, so I was determined to learn.I'll just be a porter, the extranet. Find a tutorial' Du ' is the size of the Find folderDuTyping The above at the prompt gives

The file is from the Dark Count of cnblogs,ArticleAddress: http://www.cnblogs.com/hangxin1940/archive/2011/07/10/2102087.html   Previously, it was a Windows shell, and the dark count was changed to the Linux version. This is the complete package:

When deploying a task, one of the necessary processes is to send some files, such as the installation package, to a large number of servers. Although yuge's script is available, it is a python script written through the ssh and scp functions

Shell learning: Shell echo, printf, test command, echotestShell learning: Shell echo, printf, test command Shell echo command Show normal strings echo "hello" Output: hello Double quotation marks can be omitted as follows: echo hello Output: