ps3 case shell

During parameter configuration, you must first check the content in tnsnames. ora. If the tns string to be configured already exists in the file, direct the parameter to a tns string. During parameter configuration, you must first check the content in tnsnames. ora. If the tns string to be configured already exists in the file, direct the parameter to a tns string. I recently summarized the workload during the working process and found that the parameter configuration for developers occupie

= "Ignorespace" 17history[[emailprotected]~]#2. Command completion and path completionThere are many commands and paths in Linux, and it is unavoidable to forget that the command completion feature provided by the Bash shell compensates for this flaw. Just give the first few letters of the command, bash looks for a file named after the given command name from left to right based on the path defined by the PATH environment variable, and the first time

? I?? in? $ (SEQ 1 100)? Do??? Echo $i? Done? For I? In? ' Echo? {1..100} '? Do??? Echo $i? DoneNote: Do not forget to add a space after echo, do not add space, will error(4) Read the file contents with a For loop and print to the screen? For I? In? ' Cat List.txt '? do??? Echo $iDone(5) Batch to remote host with for loop execution command? Command= "$*"? For? I???? ' Seq 1 100 '? Do???? ssh-l? Root? 192.168.1. $i? "$command"? Done(6) Bulk transfer of files to a remote host with a For loop? file

triangle#!/bin/bash //program starts #file:interactive.shread-p "Pleaseinputanumber:" num//reads the number of rows entered read-p "Pleaseinputa charsymbol: "sym//read into the displayed symbols a=1while[ $a -le $num ] //Outer Loop, A is less than or equal to the number of rows entered do b=1 //b represents the number of symbols printed while[ $b -le $a ] //the number of symbols printed is less than or equal to the number of lines do echo-n "$sym" //-n means no line break, print symbols b=

First, the grammar Case inch " content of the first variable " # Each variable content is suggested in double quotation marks, the keyword is parentheses) # execution content ;; # Use two consecutive semicolons to handle each category end! " content of the second variable " ) # execution content ;; *) # The last variable content will use * to represent all other values, but does not contain the contents

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The case syntax in shell is as follows:Case word in pattern1) Statement (s) to be execute if pattern1 matchs; pattern2) Statement (s) to be execute if pattern2 matchs; pattern3) Statement (s) to be execute if pattern3 matchs; *) Default action ;; Esac [Note] the pattern mode cannot contain metacharacters :*,? , [...] (Class, such as [a-z]) [note] the pattern can contain or sign (|) to indicate multiple ma

Orderdeveloped under the Linux platform, we are often exposed to tasks of the nature of the work, and the processing methods are diversified. Now accumulate each case. Cleaning up the data log files for nearly 7 days is getting bigger, and we need to do cleanup work in a timely manner. Mating Tool: Find,xargs#!/bin/bashfor p in ' Find/-type d-name log '; Do find "$p"-mtime +7 | xargs-i rm-f {} done　　Shell

Shell simple full-backup mysql script case [root @ cacti mysql] # cat backup. sh #! /Bin/sh www.2cto.com # created by taiyang #2012-9-16 # function: backup mysql database # set local variablesDBname = backupBackupPath =/mysqlbak/DumpFile =$ {BackupPath }$ {DBname} 'date + % y % m % d _ % H % M % s '. bak v_username = 'root' if [$ v_username! = 'Root']; thenecho "ERROR: the script must be run as mysql" exit

In linux, use shell to convert the case-Linux general technology-Linux programming and kernel information. The following is a detailed description. The problem is as follows: After installing apache, I threw a bunch of web pages into the corresponding folder. You can use the home page if you find that the source file name of the webpage is *. HTM, and the link between webpages is *. htm. I'm dizzy...

use the For loop to bulk create 10 HTML files in the/oldboy directory, where each file needs to contain 10 random lowercase characters plus a fixed string oldboy, with the following name examples:[[email protected]]# ls/oldboyapquvdpqbk_oldboy.html mpyogpsmwj_oldboy.html txynzwofgg_oldboy.htmlbmqiwhfpgv_oldboy.html mtrzobsprf_oldboy.html vjxmlflawa_oldboy.htmlJhjdcjnjxc_oldboy.html qeztkkmewn_oldboy.htmlJpvirsnjld_oldboy.html ruscyxwxai_oldboy.html(1) Answer:uuidgen|tr ' 0-9-' A-Z ' |cut-c -10

#Md5sum-c--quiet/opt/wenjian.db.ori >> $ErrLog #Retval=$? ##com file CountFind $CHECK _dir-type F >/opt/wenjian.db_curr.ori #echo "[[email protected] scripts]# diff/opt/wenjian.db* >> $ErrLog #diff/opt/wenjian.db* >> $ErrLog #If [$RETVAL-ne 0-o ' diff/opt/wenjian.db*|wc-l '-ne 0]#ThenMail-s "' Uname-n ' $ (date +%f) Err" [Email protected] Elseecho "Sites dir isok" |mail-s "' Uname-n ' $ (date +%f) is OK" [email protected]FiMail sends related configuration content[Email protected] scripts]# cat/

/mysqlstop" SERVER2_RESTART= "/etc/ Init.d/mysqlrestart "#dateDATE = ' date+ '%y-%m-%d%h:%m:%s" ' #ipIPADDR = ' ifconfigeth0|grep ' inetaddr ' |sed ' s/^.*addr://g ' |sed ' s/bcast:.*$//g ' #hostnameHOSTNAME = ' hostname -s ' #userUSER = ' whoami ' #disk_checkDISK_SDA = ' df-h|grep $DISK _no|awk ' {print$5} ' #cpu_average_checkcpu_uptime = ' cat/proc/loadavg|cut-c1-14 ' # Process_checkfunctionprocess_chEck () {fordirin $NGINX _dir $MYSQL _dirdoprocess_count=$ (ps-ef|grep "$dir" |grep-vgrep|wc

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the value of variable A is not empty[[Email protected] shell]# if [-N 1.sh]; then echo OK; FiOkIt means that when 1.sh is not empty, print OKIn logical judgment, we can also use the result of a command as a criterion, such as determining whether a file contains certain strings.For example:If Grep-wq ' user '/etc/passwd; then echo OK; FiOkThis script means no if the friend user in this file is the string, print OK. The result is that this file contain

The case name in the shell under Linux is similar to the switch in C + +, but cases in the shell are more powerful and complex.1, strong mainly reflected in: Shell in case the keyword can be a string type, and each item can contain regular expressions.2, the complexity is ma

The purpose of this paper is to review 3 kinds of IF statements and case multi-branch structure statements that the shell implements for branching, and to supplement the execution efficiency of if and case.Knowledge Reserve The language structure in the shell script is still the 3 kinds: sequential structure, selection structure, loop structure

The Linux shell has its own process Control statement, which includes a conditional statement (if), a looping statement (For,while), and a SELECT statement (case). I'll use the example below to illustrate how each statement is used.One, Shell conditional statements (if usage)If statement structure [IF/THEN/ELIF/ELSE/FI]If condition test statementThenAction[Elif C

[TOC]Shell Programming (ii) One, the logical judgment in Shell Script 1.1 judgment Statement if1.1.1 format 1:if 判断语句；then commandfiExample 1# vim if01.sh //判断数值大小第一种方法用[]，注意前后空格#!/bin/basha=5if [ $a -gt 3 ]then echo okfi[[emailprotected] ~]# sh if01.shok []-GT: Greater Than, []-lt: Less Than, []-ge: greater than or equal to, []-le: Less than or equal to, []-eq: Equals

Tags: method Mix status exp definition mysql roo cront serverFirst, Shell Script Foundation1. First ScriptVim first.shThere are three ways to execute scripts, respectively:./first.sh (need to have executable permissions)SH first.sh . first.sh(or source first.sh)2. Redirects and Pipe breaks1) redirected output (>)2) redirect Output (>> append)3) REDIRECT Input Note: Will Jerry user's password is set to 1234564) Error redirection (2>)5) Mixed redirect o