linux scripting basics

instruction (displays the exit status of the last command. 0 means no error, any other value indicates an error)$-shows the current options used by the shell, same as the SET command function[email protected] is similar to $*, but can be used as an array--------------------------------------------------------------------------------------------------#!/bin/sh##############Export lang= "ZH_CN. GB18030 "Export JAVA_HOME=/USR/LOCAL/JDKExport path= $JAVA _home/bin: $PATH:.Export classpath= $JAVA _h

51200083 linuxpartition1doesnotendoncylinderboundary./dev/sda2 64 128131024000008eLinuxLVM/dev/sda3 1281314118 1048981183Linux/dev/sda4 1411915665 12426277+5Extended/dev/sda5 141191542410490413+ NBSP;NBSP;82NBSP;NBSP;LINUXNBSP;SWAPNBSP;/NBSP;SOLARIS2, error path [[emailprotected]scripts]# ./test.shenteradiskNbsp;specialfile:hownosuchfile. [[emailprotected]scripts]#echo$?1[[emailprotected]scripts]#This article is from the "Reading" blog, make sure to keep this source http://sonlich.blog.51cto.co

A. Triangle Square exercise1. Print triangles, method one, regular expressions650) this.width=650; "src=" Https://s3.51cto.com/oss/201711/21/ea1ad50480c4e888094441dee06b962f.png "style=" float: none; "Title=" screenshot from 2017-11-21 21-34-44.png "alt=" Ea1ad50480c4e888094441dee06b962f.png "/>Method two, loop nestingI control lineJ Control Printing symbols650) this.width=650; "src=" Https://s3.51cto.com/oss/201711/21/e08401143190fdb2eb60e1ef084e1528.png "style=" float: none; "Title=" screensho

Linux ECs: linux operation basics and linux ECs Basics1. Shell Shell is the user interface of the system. The shell interpreter converts commands into system function calls and transfers them to the kernel for completion. If it is an external command or utility, then try to find the directory in the hard disk and trans

Linux basics [Article 9] and linux basics Article 9 Architecture of adding three disks to the server Note: 1. linux caches the physical memory that is not used by the system. Therefore, 859 is not the actual memory of the system. 2. The real available system memory is 921

Linux BASICS (1), Linux BASICS ( 1. Five methods available for installing linux 1. CD2. Hard Disk3. NFS Image4. FTP5. HTTP There are two scenarios for hard disk installation: A. It is installed on Win System B. The installation is started from other

Linux BASICS (6) and linux Basics I. Samba Service The Samba service is mainly used to share files with Windows users on Linux servers. Perform the following five steps to configure the server: 1. Prepare the environment 1) disable the firewall systemctl stop firewalld 2) te

Linux basics-linux software management basics: YUM, linuxyumYUM software management YUM (yellowdog Updater, modified) is an RPM front-end program designed to automatically resolve RPM dependency issues. Its features are as follows:Automatically resolves DependenciesYou can group the RPM and install the RPM based on the

Linux basics [Article 6], linux basics Article 6 What is crond about scheduled task crond? Crond is a service or software used in linux to regularly execute commands or specify program tasks. Generally, after the CentOS5/6 linux o

Linux shell BASICS (5) and Linux shell BasicsV. bash operations and startup script 01. history of bash commands # history ...... # Set (show all variables) | grep HISHISTFILE =/root /. bash_historyHISTFILESIZE = 1000 (number of historical files) HISTSIZE = 1000 (historical file size) # vi/root /. bash_history ...... (1016) # exit (Save the latest 1000 commands) #

Linux basics: Basic users of Linux users. when using Linux, users must run as one user. Users can restrict the resources that users or processes can use or cannot use. Group to facilitate organization and management. each user has a UserID, which is actually used by the operating system...

Linux entry notes: 14. Network basics and linux Network BasicsI. IP Address An IP address is a globally unique identifier of each network node on the Internet. an IP address uniquely identifies a host (strictly speaking, it identifies a network interface card ). IPv4 addresses are currently the most widely used and have been switched over to IPv6 addresses. The I

Linux shell BASICS (7) and Linux shell BasicsVII. Process Control Condition judgment control in the bash script-[] ([] expression is true) (execute the following command when the result of the front side is true) | (if-case loop control-while-utile-for-break-continue # [abc] # echo $? 0 (true) # [] # echo $? 1 (false) # ["$ USER" = "byf"] ('$? * 'Indicates remov

Linux shell BASICS (6) and Linux shell Basics6. Detailed description of Shell script programming links the content of the above five parts to increase understanding of Shell 01. shell script shell: ## perl # python # php # Different jsp scripts execute different texts, and the roles of execution are different. # shell scripts (the UNIX Like system has one princip

Linux BASICS (1), linux BASICS (Linux Command:/root directory. current directory .. files starting with "·" in the upper-level directory are hidden files, and files starting with "d" are folder man + query content or commands: view the help (external command) query content o

Linux Shell Scripting Basics Here we first talk about the shell's grammatical basis, beginning, annotation, variables and environment variables, to do a basic introduction, although not involved in specific things, but lay a good foundation for later learning easy premise.1. Linux