Shell

Using the process and runtime two classes, the return value is obtained by the getInputStream () method of the Process class[Plain] View plain copy package ark;      import java.io.bufferedreader;   Import  java.io.IOException;  

Share a shell script executed by your own Hadoop, But for those who write shell scripts, it's not going to work. People who can't write shell scripts seem to be confused. If you are interested in learning, you can contact in private. As for The

Usually in the console input commands such as: sudo, SSH, ftp or modify the admin permissions of the file will require input password, but in the She ll script to run the process of how to automatically enter the password. Below is a summary of

When writing scripts in Linux, there is always the need to determine whether the existence of files, the contents of the file is empty and so on, and these operations can be implemented with the test instructions, through the man test instructions

A fun Linux shell script, the basic idea is to loop the call Cowsay The effect is as follows ------------------------------------------------------------------------Gorgeous split Line------------------------------------------ -----------------------

Well, it's purely memo-type. 1. Install peanut shell and register a free domain name. 2. The network environment determines the future operation ① If your machine is connected directly to the extranet, the router is not used, so you can use it. ②

Recently in doing the server, because it is all-weather operation, the server is not said to be absolutely stable, never crash never crashed anything, so even if the downtime does not matter, the key is to be able to start in time, can not affect

Step One: Locate the session information for the specified user, and draw up the execution script: #!/bin/ksh echo "conn Sys/sys as SYSDBA select ' Alter system kill session ' ' | | Sid | | | serial# | | | ' From sys.gv\ $session where

1, view namespace Hbase>describe_namespace ' Ai_ns '2, List all namespace Hbase>list_namespace, 3, Create a table under namespace Hbase>create ' ai_ns:testtable ', ' FM1 ' the management of the table 1 See what tables are available

Tee Cat >> Test &m Tee To redirect output to files and screens at the same time: Date | Tee now Cat >> test Use a custom delimiter to create a documentDelimiter is a delimiter, customizable, and we're using append redirectionThe above command

on the shell: 0 indicates standard input, input data from the terminal, generally refers to the keyboard 1 indicates the standard output, the data displays to the terminal, generally refers to the screen 2 indicates standard error output, Error

#!/bin/bash destmailslist= ("xxx@xxx.com"); Build_dir=g3_asic_yocto Log_file= "G3_asic_dailybuild.txt" Tail_file= "./tail.txt" #CurTime =$ (date "+%y%m%d") daytimetag=$ (date "+%y%m%d") montimetag=$ (date "+%y%m") yesttag=$ (date-d ' 3 days ago ' +

how hbase is accessed1. Native Java API: The most conventional and efficient way to access;2, hbase shell:hbase command line tool, the simplest interface, suitable for hbase management use;3, Thrift Gateway: The use of Thrift serialization

Enterprise Practice question 1: (Production actual case): monitor MySQL master-slave synchronization is abnormal, if abnormal, send sms or mail to the administrator. Note: If there is no master-slave synchronization environment, you can use the

First, Introduction 1. Cal Calendar LS Viewing files and directories WHOAMI Viewing Current user information Users or who or W view the current online user Logout Sign Out Shutdown or Powoff shut down the system Init 6 or Reroot reboot system passwd

The Bash command explains that the package program contains some internal commands. Internal commands are invisible in the directory list, and they are provided by the shell itself. Common internal commands are: Echo,eval,exec,export, ReadOnly, read,

1. Some common functions Wildcard wildcard is a pattern matching function, the function model is roughly $ (wildcard parameter), the function's return value is the file that is actually found after the match, or other, depending on the argument,

Unlike Java, PHP and other languages, SH's process control is not empty, such as (the following is the PHP Process Control notation):PHP if (Isset ($_get["q"]) { search (q);} Else { // don't do anything }You can't write this in Sh/bash, and

Normal way:#! /bin/bashecho "Please enter your name:" Read Nameecho "your name is $name." 123456 result: [Email protected] ~]#./jiaohu.sh Please enter your name:yvesyour name is Yves. [[email protected] ~]# 12345 The following two ways to

first, use the For loop to calculate the 1-100 and. Here I list two ways, please peer more suggestions. Propose a better method or a more optimized small script program。1. With for I in mode:[[email protected] ~]# vim forin.sh #!bin/bash#The for i