Shell

1. IntroductionHBase is a distributed, column-oriented, open-source database derived from a Google paper, BigTable: A distributed storage system of structured data. HBase is an open source implementation of Google BigTable, which leverages Hadoop

Man test can see these  Comparison symbol:-lt less than-le less than or equal to-gt greater than-ge greater than or equal to-ne does not equal-eq equals Greater than (requires double brackets), such as: (("$a" > "$b") >= greater than or equal

Tag: blank linux target password nullHomework 1, request to add a user newuser, if it already exists then display "The user USERNAME is exists", if present, add it and set its password to "[email protected]"

CentOS Shell Basics 2015-4-8 12th SessionThe first half of the classThe second half of the classHistory: Command history, save 1000 commands by default!! : Previous command!$: Last parameter of previous command!n: Executes the nth command in the

                          Bash of the Base Infrastructure Special Sex21. provides a programming environment Program: Instruction + data program programming Style: Process: command-centric, data-serving instruction; Object type: Data-centric,

1.shell OverviewThe shell is a command-line interpreter that provides the user with an interface system-level program that sends a request to the Linux kernel to run the program, and the user can start with the shell, suspend, stop, or even write

1 Descriptionthis Shell script is the first generation of my written version of the Delta Code on-line script, now the code-on-line script has been updated several versions, focus on the technical focus is to visualize the code version of any

#!/bin/bashcd ' dirname $ ' bin_dir= ' pwd ' CD. Deploy_dir= ' pwd ' conf_dir= $DEPLOY _dir/confserver_name= ' sed '/dubbo.application.name/!d;s/.*=//' conf/ dubbo.properties | Tr-d ' \ r ' server_protocol= ' sed '/dubbo.protocol.name/!d;s/.*=//'

#!/bin/bash# defines greatest common divisor and the minimum number of conventions gcd_result= "lcm_result=" "#定义一个相加的函数function  sum ()  { result=$ (  num1+num2 )   echo -e  "\033[31m  two number of $result \033[0m"}# Define a greatest common

Today I suddenly wondered how many lines of code I had written recently, and then I used the shell to figure out the most recent code: ? 1 Find/home/chengshuguang/mango-maxdepth 1-name ' *.c '-or-name ' *.cpp '-or-name ' *.h ' |

Bash Variable type:Environment variablesLocal variables (local variables)Positional variablesSpecial variablesLocal variable: Valid only in the current process (shell).BASH: Direct use, no need to declare: Name = Jerry;Variable substitution: How to

Too lazy, these days seem to have been lazy cancer, do not want to write a blog. Later think about, knowledge, or share the good. The first to cure their own lazy cancer; second, consolidate your knowledge by the way. There are two types of

Use the awk command to combine two lines of the same name in the following two files.A file:Han Hailin 21 years oldHailin Korea 23 years oldHan Linhai 22 years oldLin Hai Han 24 years oldB File:Han Linhai MaleHailin Han NanHan Hailin MaleLinhai Han

Ubuntu14.04Given a text, count the number of occurrences of the word# solution 1grep is used in conjunction with AWK and is written as a sh script fre. SH SH fre.sh wordfretest.txt#! /bin/Bash# solution 1if[$#-eq0 ] ThenEcho "usage:$0 args

a few powerful commandsShare some shell usages and scripts that you may not know about, simple & powerful!Before reading the following sections, it is strongly recommended that the reader open a shell experiment that is not da Lu Huo in the shell

"Bash shell built-in Commands"Type-a:File: Represents an external commandAlias: The name set by the command aliasBuildin: Internal commandNote: The execution of a command can be performed using both absolute and relative paths (./)."Directories and

ArrayAn Introduction to arraysThe definition of the usual a=1,b=2,c=3; if there are many variables, one more definition is laborious, and the variables are laborious.Simply put, an array is a collection of elements of the same data type sorted in a

Switch from Linux shell array creation and usage tipsThe Linux shell is much more powerful in programming than Windows batch processing, both in loops and operations. Data types are not comparable. Here's a summary of some of the things that an

The Linux shell is much more powerful in programming than Windows batch processing, both in loops and operations. Data types are not comparable. Here's a summary of some of the things that an individual does when it comes to working with arrays.1.

In the author's series of development tutorials, there is a relatively basic and important section: Development debugging. In the article I recommend two dynamic domain name resolution tools to deploy the local development environment as a server,