Shell

Little stuff, for database backup.Retained.#!/bin/SHkeepdays= -currenttime=`Date "+%y-%m-%d-%h-%m"' Backpath="/sql_bak/"DbName="Smdb"Echo${currenttime}/usr/bin/mysqldump--default-character-set utf8-u xxx--password=xxx--database ${dbname} >${backpath}

#系统变量Env View System Variablesecho $HOSTNAME View variable contentsSet view system environment variables, also display user-defined variables, compare all#用户自定义变量a=1;b=2 Defining variablesecho $a $b output variable value#引用变量执行结果Myvim= ' which vim '#

A wildcard is handled by the shell, and it appears only in the parameters of the command (it is not used in the command name or on the operator). When the shell encounters a wildcard in parameters, the shell treats it as a path or file name to

Intra-enterprise network segment detects how many hosts are alive1) byPingLifeorder to achievePing-c 1-w 1 IP- C: indicates the numberof times , 1 is 1- W: represents deadline, time out , in seconds,1 for 1 seconds. Note: a) If one goes to ping to

==================================================#!/bin/bashsqlplus=sqlplus64username=$1psswd=$2filedir=$3[[$ Filedir] | | Filedir= "/sandbox/edf_api_repo_dir" [[-D $filedir]] | | {echo "mkdir $filedir"; mkdir $filedir; chmod 777 $filedir;} [-D

1. Location of shell configuration files The most commonly used shells are SH and bash, which only speak sh and bash here. 1.1. SH (Bourne Shell) configuration file has two main, respectively, each user home directory

Linux Shell Common Skills (i)Http://www.cnblogs.com/stephen-liu74/archive/2011/11/10/2240461.htmlI. Special documents:/dev/null and/dev/ttyTwo. Simple command trackingThree. Regular expression basic Syntax descriptionFour. Use the Cut command to

#!/bin/bash#by lc#protnum= ' netstat-lntup|grep java |wc-l ' [email Protected]tomcat_prot () {if [' Netstat-lntup|grep Java |wc-l '-ne 9]then clear Echo-e "\033[31m############################################\033[0m" Echo-e "\033 [31m#\033[0m "" \033

In order to do cluster testing, 3 tomcat is installed on each machine, each time the project is released, it is necessary to repeatedly knock some commands, check that the Tomcat process has not stopped before restarting Tomcat, and kill the process

The server contains many engineering directories, SSH login, need to manually knock command, very troublesome, can establish automatic login script1, the server logon is the default directory in the creation of script files　　 VI drivers.sh

1, Reason analysis:No. Bash_profile This file can be displayed by configuring this file recovery path.2. Configuration steps:(1), Vim ~/.bash_profile Add the following command here:Export ps1= ' [\[email protected]\h \w]\$ '(2), after saving to

A If statementif [expression]ThenElif[expression]ThenElseFiNote: There should be a space before and after expression;Then you can start another line, or you can go with the if peers, to add '; ' ；Two Case modeCase Value inMode

1. you want to download a software from the server, your machine has two network cards eth0 and eth1, the address is configured as follows:Eth0 : 192.168.6.25/24Eth1 : 172.16.101.25/24 default gateway: 192.168.6.1/24 server address:211.138.18.3

Basic knowledge of Shell programmingThree ways to empty a log1.echo Cary >test.log>test.log2.echo Cary >test.logEcho >test.log3.echo Cary >test.logCat/dev/null >test.logShell scripts are good at working with plain text type data, while almost all

First, the name of the variableThe variable name must begin with a letter or underscore, consisting of a letter, number, or underscore, and the variable name cannot exceed 255 characters in length.Ii. Classification of variables1. User-defined

In Linux there are many ways to read a file row by line, the most common is the method in the following script, and is the most efficient, most used method. In order to give you an intuitive feeling, we will test the execution efficiency of various

Batch Create files first#!/bin/shif [!-d/tmp/Chenyao]then mkdir /tmp/chenyao-p fi /tmp/Chenyao for in {1.. Ten }do touch chenyao-$i. html doneBatch Renaming[Email Protected]amp scripts]# cd/tmp/chenyao/[email protected]

Early computers because you understand the reason there are multiple physical terminals (by connecting the port of the computer what to achieve), here the terminal is the I/O device. The computer itself, which is inherently an I/O device (not an

1. File Test Actions----------------returns True if ...-e file exists-a file has the effect of this option with-e is the same. But it has been deprecated and does not encourage the use of-Ffileis a regular file (not a directory or device file)-s

String:1. Single quotes:str = ' value 'Single-Quote String restrictions:Any character in a single quotation mark is output as is, and the variable in the single-quote string is not valid;Single quotation marks cannot appear in single quote strings