shell scripting basics

Shell Scripting Learning The shell is the command parser that converts the user-entered instruction into a program that the appropriate machine can run.The shell is a program that acts as an interface between a user and a Linux system, allowing the user to enter commands to be executed to the operating system, which c

Shell Getting Started Tutorial (1)-shell-JUSTKK's Column-Blog channel-csdn.nethttp://blog.csdn.net/justkk/article/details/43795131 Shell Getting Started Tutorial (2)-Variables and Parameters-JUSTKK-Blog channel-csdn.nethttp://blog.csdn.net/justkk/article/details/44081993 Shell Getting Started Tutorial (3)-command edito

) values in the script after the end of the script, still exist in the current shell, and SH and bash are not, so when doing shell scripting development. If there is a requirement in the script to refer to the contents of other scripts, or to configure the file, use the "." Dot or source to load the script or configuration file at the beginning of the script, and

Shell: It was a major shell in earlier versions and later became a standard. Written by Stephen Bourne from Bell Labs. Each Unix-like system has at least one shell compatible with it. The program of the Bourne Shell is named "sh", which is usually put in/bin/sh. C shell: wr

Some good habits of shell scripting 1. Naming rules The script name ends with. SH, and names are as famous as possible. Here are a few of the script naming styles that are available for reference. Through the following fresh and refined style, readers can easily understand the role of the script.clearlog.sh clearlog.sh clearsql.sh snmp_install.sh monitor.sh 2.

Bash's script preliminaryShell script: Another form of preserving historical commands;Shell script Programming:What do you mean by programming?Write the program source code.In order to enable users to use the computer, you can let the computer do some tasks in a non-interactive way, you need to make these tasks called a file, so that the computer read sequentially, so as to achieve the function;Programming Languages:Advanced Language:Depending on how

used with variable names, and if the loop body does not include a variable name, a dead loop may occurHow the list is generated:1) Give a direct2) List of pure integersSEQ: Output An integer listseq [First [INCREMENT]] Last3) curly braces unfold{first.. Last}4) return value of the execution result of the command5) GLOBBING6) references to certain variables: [email protected], $*Features of the For loop:1. There is almost no cycle of death;2. The entire list needs to be loaded into memory during

article, after receiving the strong support of Mr. Hongbin of Chinabyte Network College, you will be able to see this article. The author earnestly hopes that through this article for the vast number of WEB developers and enthusiasts to provide convenience, to enable everyone to participate in the study and exchange of ASP, in order to cover the needs of readers at different levels the author decided to start from the most basic scripting language,

overwrite, the original number of filesAccording to LostC: Append the standard output to the file with >> attached to the program >> files to the endD: Piping "|", PROGRAM1 | Program2 the standard output of the PROGRAM1 as a standard input for PROGRAM2More than two programs can be linked together, but also greatly improve the speed of implementationEg:tr-d ' \ r ' Output to a file in the final sequence.(12) Special documents/DEV/NULL and/dev/tty 46This article is from the "Tabsang Growth Histor

9641716 1% /mysdcComplete.Shell Scripting AutomationAbove, we are using the Fdisk tool to interactively partition the hard disk. So how do we write it into Shell scripting automation. Look back at the sequence of operations that we just entered when we were interactively partitioning, and then read the following script yourself, too simple, nothing to say.#!

be output to the monitor while redirecting files, but generally overwrite the original file content, you can use the-a append contentCode 5-23[Email protected]:/data# date | Tee Textmon Dec 5 06:18:04 CST 2016[email protected]:/data# cat text Mon Dec 5 06:18:04 CST 2016[email protected]: /data# who | Tee text root pts/0 2016-12-05 04:26 (122.90.143.21) [email protected]:/data# cat text root pts/0 2016-12-05 04:26 (122.90.143.21) [Email protected]:/data# date | Tee-a text

Shell script is similar to batch processing under Windows/dos, that is, the use of various commands pre-placed into a file, convenient one-time execution of a program file, mainly for the convenience of administrator settings or management. The advantage of scripting languages over Perl and Python is that it handles the underlying business because there are a lot of Linux commands to support, such as "Alarm

The experience of Shell scripting in developmentThis period of time in the development of a program, program output has a lot of logs. Sometimes you need to log to analyze the problem of the error. Separate viewing efficiency is too low to analyze anything. So I thought of the shell. Log files are on Android's phone!Development environment Fedora, MacOS.Mobile ph

What is a shell script sampleLet's look at an example:#!/bin/shcd ~mkdir Shell_tutcd shell_tutfor (i=0; iExample explanation Line 1th: Specify the script interpreter, here is the interpreter with/bin/sh Line 2nd: Switch to the current user's home directory Line 3rd: Create a directory Shell_tut Line 4th: Switch to the Shell_tut directory Line 5th: Cycle conditions, 10 cycles Line 6th: Create a test_1 ... 10.txt file Li

Tags: ges vim editor nginx root user Form bash script expec Ash rsyncObjectiveLearn about the knowledge reserves required for Shell script programming:Vi/vim Editor Command VIMRC set to be proficientBasic commands, more than 100 skilledBasic and common Network Service commands to be: NFS, rsync, INotify, Lanmp, Sersync, SSH keyI. Shell scripting concepts and exam

article, after receiving the strong support of Mr. Hongbin of Chinabyte Network College, you will be able to see this article. The author earnestly hopes that through this article for the vast number of WEB developers and enthusiasts to provide convenience, to enable everyone to participate in the study and exchange of ASP, in order to cover the needs of readers at different levels the author decided to start from the most basic scripting language,

Previous section Review　　In the previous blog post, I focused on the background of Shell scripting, how to create the first shell script in life, and the shell variables. The next step is to introduce shell programming, mainly around she