Shell

Script code:New File back_db.sh #!/bin/Bash Todaytime="' Date +%y%m%d '"DBNAME="test MySQL"Dumppath="/usr/local/webserver/mysql/bin/mysqldump"HOST="XXX"USER="XXX"PASSWD="XXX"Db_file="/home/data/backup/db_$todaytime.sql.gz"

Five, for security requirements each execution of the shell manually entered the password$ VI test5.sh#!/bin/bashEcho-n "Enter password for u_test:"Read PASSWDSqlplus-s/nolog Conn u_test/$PASSWDSELECT * from tab;ExitEof$ chmod +x

Simple implementation of the more commands under Unix:#include #define Pagelen 24#define linelen 512int do_more (file * file); int see_more (file * file); int main (i NT Argc,char * argv[]) {FILE * fp;if (argc = = 1) do_more (stdin); Else{int

During scripting, input to parameters is usually involved. For example, SH 1.sh 10 20, in the execution of 1.sh this script, 10 is the first parameter, 20 is the second parameter. Sometimes there is this confusion about how many variables can a

Files that are often edited under Windows are sent to Linux remotely, ^m at the end of each line, which causes the shell script to run incorrectly, mainly because the editor under dos and the editor under Linux are inconsistent with the carriage

Comparison and judgment are the elements of program flow control. This article summarizes shell comparison and judgment statements for ease of searching and using. 1. Important comparison Operators Greater than:-GT Less than:-lt Greater than

   国庆过后；感觉有点慵懒些了；接着上篇；我们继续来学习循环语句。     一. for循环         与其他编程语言类似，Shell支持for循环。 for循环一般格式为：for 变量 in 列表do command1 command2 ... commandNdone    列表是一组值（数字、字符串等）组成的序列，每个值通过空格分隔。每循环一次，就将列表中的下一个值赋给变量    例如，顺序输出当前列表中的数字 for01.sh$ cat for01.sh

1  shell 的$! ,$?, $$,[email protected]   $n        $1 the first parameter,$2 the second... $#        The number of command-line parameters. $0        The name of current program. $?        Last command or function‘s return value. $$   

#! /Bin/sh # program description # scripts for implementing the tomato working method # tomato working method rules # Rule 1: A tomato lasts for 30 minutes, including 25 minutes of work and 5 minutes of rest. # Rule 2: the time of a tomato is

Question link: http://acm.hdu.edu.cn/showproblem.php? PID = 1, 2446 Problem descriptionin the 17th century, with Thunderous Noise, dense smoke and blazing fire, battles on the sea were just the same as those in the modern times. but at that time,

Shell script tracing and debug Before scripts runs, the most feared problem is the syntax error! So how can we debug it? Is there a way to determine whether there is a problem without directly running the scripts? Haha! Of course! Let's take the

Recently, as the project requires remote access to the svn server, but there is no fixed domain name or IP address, we plan to use a peanut shell to apply for a free domain name to build a server, and then deploy visualsvn on the server, you can

-EQ equals -Ne is not equal -GT greater -Ge is greater than or equal -Lt is less -Le is less than or equal   SEQ 1 30 numbers from 1 to 30 Touch-mt2010030303.03 $ dir: Modify the directory time format STAT/tmp/1.dir view the modification time Lines

There are a lot of for loop usage in shell. I always want to summarize it. Today I saw a summary of for loop usage on the Internet, which is very comprehensive. So I will turn to research and study... 1. For (I = 1; I 2. Commonly Used in shell is

1. The true and false values in bash are not the values 0 and 1 we generally think. True and false are built-in shell commands that return logical values. For example: $ True $ Echo $? 0 $ False $

Tag: ShellStrictly speaking, Because 0 is the default value of > This method is used to export data to a file. If the file does not exist, the file is created. If the file exists, the file is cleared. Generally, this method is used when we back

1. Echo Parameters -N does not wrap (default line feed) -E makes the transfer character valid Example Ss = 'abc \ n' echo-e $ ssabc # echo $ ssabc 2. When assigning values = do not include spaces on both sides A = "hello" # error A = "hello" 3.

[[Email protected] shell] # Cat getopts. Sh #! /Bin/bash # Date = 2014-09-16 # Is to practice the getopts While getopts "A: BC" Arg (: The preceding variable must follow the parameter) Do Case $ ARG in A) Echo "A's Arg: $ optarg" ;; B) Echo "B" ;; C)

Shell to view the basic information script of the system #! /Bin/bashecho "IP:" ifconfig | grep "inet addr" | grep-v 127.0.0.1 | awk '{print $2}' | awk-F ': ''{print $2} 'echo" Product Name: "dmidecode | grep Nameecho" CPU Info: "dmidecode | grep-I

Basic Regular Expressions and shell Regular Expressions for Linux shell Programming Fast query of Linux commands and Shell programming examples Covers common Linux commands, including Shell script programming syntax, text processing