Shell

Spark 1.4 was downloaded and the following error was encountered while running Spark-shell: Java.net.unknownhostexception:ukon-m-q0ep:ukon-m-q0ep:nodename nor servname provided, or not knownAt Java.net.InetAddress.getLocalHost

Http://note.youdao.com/share/?id=a9d02257b639c94323c818bc38423919&type=notealias Command Alias:http://note.youdao.com/share/?id=cbcbd1156ab1f0835c4f76131dbf98e2&type=noteView Current User history commands History:http://note.youdao.com/share/?id=e878

#!/bin/bash#递归打印当前目录下的所有目录文件. PRINTF() {ls $| while ReadLine#一次读取每一行放到line变量中 Do[- D $/$line] && {dir="$/$line" Echo $DIR} dir1= ' DirName$DIR`#求路径. A= ' Ls-f$DIR 1| grep/| Grep"\$line\>"`#判断line是不是一个目录. if["$A"=="$line/"]; ThenPrintf"$

#!/bin/sh# description show_usage= "args: [-I,-P,-u,-w,-A,-s,-D,-v] [--ip=,--port=,--user=,--pwd=,--path=,--scrip t=,--debug=,--version=] "#参数opt_ip =" "opt_port=" "opt_user=" "opt_pwd=" "opt_path=" "opt_script=" "opt_debug=" "Opt_ version= ""

The way to compare two strings for equality is:If ["$test" x = "Test" x]; ThenHere are a few key points:1 using a single equals sign2 Note that there is a space on each side of the equal sign: This is the UNIX shell requirement3 Notice the last X of

6. Script timed Tasks# Example of job definition:# .------------------------- minute (0 - 59)# | .--------------------- hour (0 - 23)# | | .----------------- day of month (1 - 31)# | | | .------------- month (1 - 12) # | |

#!/bin/bash #fix by Leipore at 2014-12-18ddos-autoprotection.shTouch/root/back_bad_ip.txt Time= ' date + '%y-%m-%d%h:%m:%s ' Ar= ' wc-l/root/back_bad_ip.txt |awk ' {print $} ' Sleep 1 Netstat-an |grep |grep-v "STREAM" |awk ' {print $} ' |sort |

While loop:Format OneWhile condition;DoStatementDoneFormat Two dead loopsWhile TrueDoStatementDoneFormat three dead LoopsWhile:DoStatementDoneFormat Four dead LoopsWhile [1]DoStatementDoneFormat Five Dead LoopsWhile [0]DoStatementDone****************

HBase provides a shell terminal to interact with the user. Use the command Hbaseshell to enter the command interface. You can see the Help information for the command by performing a helper. Demonstrate the use of hbase with an example of an online

If statement 1) if ... else statementSyntax for the IF ... else statement:if [Expression]then if is true fiIf expression returns True,then, the statement is executed and no statement is executed if False is returned.Finally must end with FI to

This article turns from: http://www.jb51.net/article/56548.htm This article mainly describes how many parameters the shell supports? This article is a test article on how many parameters a shell can enter, and the friend you need can refer to the

View types of commands: type[[Email protected] ~]# type CDCD is a shell builtin[[email protected] ~]# type Lsls are aliased to ' ls--color=auto ' [[Email Protected] ~]# type-a Lsls is aliased to ' ls--color=auto ' ls is/bin/ls[[email protected]

Today received the relevant departments reflect that the storage space is not enough. You need to delete some video files to make room. As soon as I took the job, I wrote a python script. Helpless, personal Python level is also an introduction. So

1#!/bin/Bash2Temp= 'getopt-O HM:--LongAai:,mai:-N'getopts.sh'--"[email protected]"`3Eval Set--"$TEMP"4 while true5 Do6 Case " $" inch7-h|--AAI)8 Echo$29 Shift 2;;Ten-m|--mai) One Echo$2 A Shift 2;; ---) - Shift the Break ;; -*)

cat mail.sh#!/bin/bash#--------------------------------------------------# created:2015-05-04#  author:jimmygong# mail:[email protected]# function:shell mutt msmtp# version:1.0

Today a shell script is written, and direct execution is possible.But it's not done with a task plan.The script is as follows:#!/bin/bashtime=0504timea=05Mysqd-f-u root DTS Tangled up half a day, then changed to absolute path on it.The script is as

From the programmer's point of view, the shell itself is a program written in C language, from the user's point of view, the shell is the user and the Linux operating system communication Bridge. The user can either enter command execution or use

The return value of the Shell function (return), which only supports integers#!/bin/shget_str () {return "string"}get_strecho $?The output is as follows:./test.sh:line 5:return:string:numeric Argument required255You can see that the return integer

The Shell profile:When a new interactive shell is started,/etc/profile, followed BY/ETC/BASH.BASHRC (if aBash shell), ~/.profile, and finally ~/.BASHRC is executed in that order.PATHcan set your pathenvironment variable to tell the shell where to

The company's new demand, suspected PV and IP ratio is not right, see if there is malicious east:Nginx Configuration:Log_format main "" $http _user_agent "" $http _x_cookie "" $request _time "" $upstream