Shell

In simple terms, this technique corresponds to the following scenario Suppose there is text as follows Copy Code code as follows: Cccc Aaaa bbbb dddd bbbb Cccc Aaaa Now it needs to be processed, this is simple,

Shell script: 1, #! Shell that specifies script execution2, # Annotation3. command or grammatical structureecho "Input"Echo Output blank linePerform: 1. Shell ScriptSH Example2, to the shell script execution permissionschmod U+x ExampleCase:

Find a special embarrassing fact. I worked hard to Baidu data, want to use rewrite to achieve different domain name source station after the failure of automatic jump function, but the whole idea of missing a serious problem. In my mind, make a

Copy Code code as follows: #include #include int main () { Char castdoutline[1024]; One line of information in the standard output of the PS command char* pctmp = NULL; A string that points to a space split Char caselfpid[10]; PID

Linux Environment: Ubuntu Copy Code code as follows: #! /bin/sh # Provides:server.sh # Default-start:2 3 4 5 # Short-description:server Testing ... Exec_path=/home/huangmin/cdev/project Exec=server

A: This script runs the machine, the Linux RHEL6B,c,d,... : To be installed zookeeper cluster machine, Linux RHEL6 First, on the machine A that runs the script, determine if SSH can be logged in without a password to the machine b,c,d to install ZK,

A few days ago wrote seven bull demo, with Bash wrote a convenient installation of the script, involving the path-related judgments, from StackOverflow, plus their own practice to tidy up. Simple version The following is one of the simplest

1. Use of time-related random numbers Generate output Unixtimestamp (%s) and current time nanosecond data (%N, accurate to one-seconds) using the data command. ) The former ensures that the output does not repeat in different seconds, and that the

As a Linux SA, many parts of the day-to-day operation of the script, and the server's IP is generally static IP or Mac binding, of course, the latter is relatively cumbersome to operate, and the former we can set the host name, IP information,

Do unix/linux under the development, scripting skill is indispensable, as Shell programming, is also a profound technical field, here in order to learn, write a simple IP address is the legal micro-script program, this small program is also very

1. Judging variables Copy Code code as follows: Read-p "Input a word:" Word if [!-n "$word"]; then echo "You have not input a word!" Else echo "The word you are $word" Fi 2. Judging input parameters Copy

Copy Code code as follows: #!/bin/bash : Transcoding tool, support UTF-8 turn GBK and GBK to UTF-8Kong Lingfei @2012-05-07Mark #set-X Scode= "GBK"Dcode= "Utf-8" function Usage (){Cat Usage:conv [OPTIONS] [DIR][-u] GBK to UTF-8[-G] UTF-

The daily analysis of the log of the brothers really can't afford to, often need to give pv,uv, independent IP and some statistics, use C/c++,java can write, the process is such, read the file, scan by line, put the value of the tag into the data

The code is as follows: Copy Code code as follows: #! /bin/bash function Read_file () { For line in ' cat $ ' Todo If [' Echo $line |grep ' ^[a-za-z0-9_-]*@[a-za-z_-]*\.[ a-za-z_-]*$ "'];then echo $line >> Result.txt Else

There are a lot of ways, and here are three ways to write: Writing a: Copy Code code as follows: #!/bin/bash While Read line Todo Echo $line Done Writing two: Copy Code code as follows: #!/bin/bash Cat

Copy Code code as follows: #!/bin/bash While ["1"] Todo Eth=$1 rxpre=$ (Cat/proc/net/dev | grep $eth | tr: "" | awk ' {print $} ') txpre=$ (Cat/proc/net/dev | grep $eth | tr: "" | awk ' {print $} ') Sleep 1 rxnext=$ (Cat/proc/net/dev |

Basic knowledge Shell execution Mode SH xx.sh (file must have R permission) | | ./xx.sh (file must have X permission) Note: Sh xx.sh method is more safeFileName suffix. shShell content Opening #!/bin/bash | | #!/bin/sh | | #!/bin/csh | | #!/bin/ksh

Today on the Internet to see a web connection average time of the shell command, in their own machine tried, found that can not use, incredibly appear awk:fatal:division by zero attempted such a mistake, Mao's own changed the shell command.

Today, my company colleagues to my entire ADSL automatic redial shell, and detect whether connected to, so as to ensure that the internal test server does not drop the net, OK, I sent the script below. System: CentOS 5.x Script 1: Copy Code

Script A (test example 1) Copy Code code as follows: #!/bin/bash Echo ' Your are in the ' Q) Call another script file in the current script file? Method One: Using sourceScript second (test example 2) Copy Code code as