Shell

$: script name, which is the script name entered by the command line$n: Positional parameters, n>0, when n>9, using ${n} form$#: Number of positional parameters"$*": All Positional parameters (single string)[Email protected]: All positional

Format: echo-e "\033[word background color; font Color m string \033[0m"For example:Echo-e "\033[41;36m something here \033[0m"Where 41 of the position represents the background, 36 of the position is the color of the wordThose ASCII code is the

1. Printing process [[email protected] program_test]# PS-E | HeadPID TTY Time CMD1? 00:00:03 Init2? 00:00:00 Kthreadd5 y 00:00:00 migration/06} 00:00:00 ksoftirqd/03 y 00:00:00 migration/04} 00:00:00 watchdog/07? 00:00:00 events/08? 00:00:00 Cgroup9?

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.Shell programming As with Java, PHP programming, as long as there is a code to write a text editor and a can explain the execution of the script interpreter can be#!/bin/sh (#! tells the system that the program specified after the path is the

First, FTP download the current file according to the date#!/bin/bashdate= ' Date +%y%m%d ' ftp-n Second, upload the current file according to the log#!/bin/bashdate= ' Date +%y%m%d ' ftp-n Three, more and catalog upload download#!/bin/bashdate= '

Positional variables:$: Gets the file name of the current execution shell, including the script path if the script is executed with a path $n: Gets the n=1..9 parameter value of the currently executing shell script, which represents the file

1.5 Cut command--split fileCut-d:-F 3/ETC/PASSWD take 3rd paragraph1.6 Sort Command--sortSORT-T:-k3/etc/passwd sorted by 3rd paragraph-N Sort by number-R Reverse Order-U Remove Duplicate entries1.7 WC Command-L Calculation of rows-W Computed

#!/bin/bash#auth chentp0601#date 20151123Function menu (){ClearCat #this is Base menu1.[install Lamp]2.[install LNMP]3.[exit]EofRead-p "Please input 1-3:" ListCase $list in"1")While TrueDoMenu_lampDone;;"2")While TrueDoMenu_lnmpDone;;"3")Echo-e

Linux shell variables get execution resultsThe method of assigning the result of a command to a variable is:1, use the anti-quotation mark "(number key 1 left key, TAB key above, English way input)such as: A= ' echo ' Hello World ';Assigning the

Tag: The shell connects two scripts.#!/bin/bash##This is for auto run the script to save the time##By [email protected]#chose the latest file and chose one to runarray[0]= ' Ls-lt/mnt/shfw/builds/griffin/experimental | awk ' {print $9} ' | Sed-n '

integer comparison-eq equals, as:if["$a"-eq"$b" ]-ne not equal to, such as:if["$a"-ne"$b" ]-GT greater than, as:if["$a"-gt"$b" ]-ge is greater than or equal to, such as:if["$a"-ge"$b" ]-lt less than, such as:if["$a"-lt"$b" ]-le less than equals,

Shell Statistics Log InformationIn general applications, log information is logged using log4j and a log file is generated daily, with each file ending on the date of the day.How do I count and analyze these log messages?In the simplest cases, use

The conditional operator of awkShows the first line with root[[email protected] ~]# awk-f ': ' $1== ' root ' 1.txtRoot:x:0:0:root:/root:/bin/bashShow first line with root print first paragraph[[email protected] ~]# awk-f ': ' $1== ' root ' {print '}

#!/bin/bashWap_server= "10.0.0.1"Mem_server= "10.0.0.2"Erp01_server= "10.0.0.3"Erp02_server= "10.0.0.4"Erpold_server= "10.0.0.5"Backup_server= "10.0.0.6"Monitor_server= "10.0.0.7"Dossh=/home/lichuang/scrips/dossh.sh

The execution name of this program$n the nth parameter value of this program, n=1..9$* all parameters of this program, this option can have more than 9 parameters.$# the number of parameters for this program$$ the PID of this program (the current

Problem Description:LAN built Hadoop Environment, node/home is mounted on a separate disk, a power outage causes several node/home file system corruption, unable to recover, only after formatting and re-mount home/home, and then use the script to

Command: CutOption:-d:-f Specifies the segment divided by ": (separator)" In the first paragraph-c Specifies the number of charactersDescription: Select the command, select a piece of data we want, generally for each row to analyze the

The result returned by the conditional expression is BooleanIt's 1, false is 0.Expressions for conditional tests[Expression][[Expression]]Test expressionCommonly used for:Monocular:-e file Test files exist-F file Test is a normal file-D File Test

Each time on-line, first put the intranet code with Xhell to local. Then drag it to the online server.Dragged and dragged, too slow. So I wrote an online script.Wrote a few versions, this is the final versionscp_v3.shThe contents are as