Shell

I. Common Uses of CAT1. Summary2. Experiments(1). Non-interactive editing[Email protected] ~_~ day5]# cat > Cattest.sh > Hello> STOP[Email protected] ~_~ day5]# cat cattest.shHello[Email protected] ~_~ day5]# cat > cattest.sh Hello Cat with

Prepare 3 Machines1.linux-node1 ip:10.89.3.108 (Springboard machine)2.weblamp ip:10.89.3.1003.weblnmp ip:10.89.3.101The 3 system environments are as follows:[Email protected] ~]$ cat/etc/redhat-release CentOS release 6.8 (Final)1) First do SSH key

Personal configuration is mainly concentrated in the ~/.profile file.When you open a new interactive shell, the order in which the configuration files are executed is/ETC/PROFILE/ETC/BASHRC ~/.profile and finally ~/.BASHRCEnvironment variables--can

First we need to understand the content and format of the script The first line must be shebang (interpreter path), shebang must occupy the absolute beginning In the shell script, except for Shebang, the contents of the line beginning

First we need to understand the content and format of the script The first line must be shebang (interpreter path), shebang must occupy the absolute beginning In the shell script, except for Shebang, the contents of the line beginning

2.1.1 Parameters for shell scriptsCommon parameters(1) * A string to display the parameters passed to the script, and the location variable, this parameter can be more than 9(2) @ start at parameter 1, show all parameters passed to the script, and

As a participant in a large open source community, or rather as a member of the Fedora project, I have the opportunity to meet with many people and discuss various interesting technical topics.My favorite topic is "command line" or shell, because

I. Introduction to Linux Shell1. Shell overviewThe shell is an interface that the user interacts with the kernel, and the most popular shell is now called the Bash shellThe shell is a programming language The Shell is a scripting language, so you

Automatic deployment, initial configuration, and start of Nginx reverse proxy service, automatic deployment, initial configuration, and launch of two Web#!/bin/BashYum InstallEpel-release-yYum InstallNginx-yPSAux |grepNginx |grep-V'grep'if[$?-ne0 ]

Homework One: awk, the collation of variablesawk Syntax:-F defines the field delimiter, and the default delimiter is a contiguous space or tabUse the order of $1,$2,$3 to represent the different fields of each row in files separated by the interval

Job One: organize regular expression BlogsJob Two: grep jobs (regular expressions and character processing)Target file/etc/passwd, using the grep command or Egrep1. All rows containing root are displayed:2. Output any rows that contain bash, and

One: The cluster has done two: temporary Configuration network (IP, gateway, DNS) + permanent configurationTo configure the network temporarily:IP: [[email protected] ~]# ifconfig[Email protected] ~]# ifconfig eno16777736 192.168.24.129/24Gateway: [[

Sub-Library BackupEnterprise Actual Combat Problem 7: How to implement the MySQL database for sub-library backup, please use the script to

In writing shell scripts, we need to use a variety of special symbols, through these special symbols can make the code we write more concise and efficient, here are summarized below:1. {} curly braces:Usage One: Wildcard extensionEg:ls

1.HBase Shell and we use the MySQL terminal is a means, such as we installed MySQL, CONFIGURED environment variables, command line input mysql-uroot-p password can be directly into the MySQLThe terminal, where HBase is also a meaning.How to enter

Frequently used file test operators-ongoing updates - e -- exist File exists is True - F -- file File exists and is true for normal files - D -- Directory File exists and is directory-True

The following 1.log files are counted,Requirement: What is the number of visits per IP? Prompt, awk filters out the IP first, then sorts, counts the repetitions.  You can use just one commandawk ' {stat[$1]++}; End{for (A in STAT) print Stat[a], A} '

Variable: Stores the memory space of a single element;Array: A contiguous memory space that stores multiple elements;Array name: The entire array has only one name;Array index: numbering starting from 0;Array name

Before writing a shell script, you need to automatically create 1-100 of the text without knowing how to create it. Baidu finally know the way to create.There are a lot of ways to create 1-100 in a shell script, so I'll say two easy-to-understand

There are many ways to open the file, but I learned that the use of more is the above--, in order to prevent forgetting later, the first to write down the understanding.1. ShellThis read a lot of web pages, the most reliable way to use:Shell ("" " )