read line

Shell Getting Started Tutorial: Shell variables Variable A variable is a place to store data temporarily, and is a memory space. Bash shell and other programming languages, there is no "data form", which means that the default is not to

Shell function return value, generally in three ways: return, argv, Echo 1) Return StatementThe Return Value of the shell function, which can be the same as that of other languages, returned through the return statement.Example: #!/bin/bash

In the previous blog, we talked about how to capture web pages in Linux. There are two methods: curl and wget. This article will focus on the Linux Web page capture instance-capturing the top game rankings of Google Play in the world's 12

Features: Implements a comparison of the configuration files under the project name/src/main/resources/online and the project name/src/main/resources/performance (which configuration files are missing from the former, which are the ones that are

This article introduces the shell commands in linux from five aspects, including Shell variables, basic structure of Shell, return value of Shell functions, detailed description of Shell functions, and special variables in Shell, which may be

old boy Education daily one question -2017 year 3 months -awk Array Statisticsprocess The following file contents , take out the domain name and sort the order according to the domain name :( Baidu and Sohu face test

Linux dual-Network Policy Routing script instance-(better)-Linux Enterprise Application-Linux server application information, the following is a detailed description. The dual-network architecture is much more complex than the single-network

Easy-to-make errors with shell scripts1. For i in X y z: This sentence is delimited by a space, and when our $n contains spaces, there will be errorssuch as for i in ' LS *.mp3 ', this ls *.mp3 after execution if there is a space on GGDirect for I

Ext.: http://blog.csdn.net/ithomer/article/details/7954577Shell function return value, generally there are 3 ways: Return,argv,echo1) Return statementThe return value of the Shell function, which can be returned by a return statement, as the return

Reference: http://www.cnblogs.com/dwdxdy/archive/2012/07/25/2608816.html Often to the stylistic document for line-by-row processing, in the shell how to obtain each row of data, and then processing the row of data, and finally read the next line of

===========================================================================if define a PATH variable in a statement the path that raised the command bug where path change occurs problem Original script file: INotify +rsync Live Sharing

The latest when looking at a shell data, according to the textbook, but the following error, can not runAs follows, the simple script:#!/bin/bashcat | while Read Line do Echo $line Done awk'{print $}')The following error occurred while

There are a lot of ways, and here are three ways to write: Writing a: Copy Code code as follows: #!/bin/bash While Read line Todo Echo $line Done Writing two: Copy Code code as follows: #!/bin/bash Cat

Three, Shell script Development Basic Specification System functions in 1,/etc/init.d/functions action using the method: Show XXXX, and the right side shows the green OK Word: action "xxxx"/bin/true Display XXXX, and the right side shows the red

Method 1:while the most efficient and most commonly used method in the loop.While read line DoEcho $lineDone Note: This is done at the end of the file, as if it were done and then read the file in the same way.Method 2: Pipe method: Cat $FILENAME |

* No Port * No files are left after the startup.* Generally, there is no problem of UDP single packet 512 bytes. Of course, if you execute amazing commands, I can't* Non-Interactive shell, that is, you cannot use carriage return to write multiple

This article mainly summarizes the entry-level bash from the following aspects: 1. Command history and command completion 2. Pipelines and redirection 3. Command alias and command replacement 4. Edit the command line 5. File Name Configuration 6.

The ReadLine () method reads an entire line from the file. The trailing newline character remains in the string. If the size parameter is not negative, then a maximum number of bytes, including the end of the newline and the incomplete line, may be

The truncate () method truncates the size of the file. If an optional dimension parameter exists, the file is truncated (up to) the size. The size defaults to the current position. The current file location does not change. Note that if a specified

This article describes how to use the tell () method in Python. it is the basic knowledge of getting started with Python. For more information, see tell () the current position of the object read/write pointer returned by the method. Syntax