Shell

Security Code: To prevent accidental deletion of the system database, scheduled backup you I more peace of mind! automating backup databases with shell scriptsFirst, IntroductionSystem database (take MySQL5.5 as an example)650) this.width=650; "Src="

1#!/bin/Bash2prefix=192.168. the3num=14 while["$num"-lt"255"]; Do5 Echo-en"Pinging ${prefix}.${num} ..."6 Ping-c1-w1-t5 ${prefix}.${num} >/dev/NULL 2>&17 if["$?"-eq"0"]; Then8 Echo "OK"&&Echo"${prefix}.${num}" >>Ok.txt9 ElseTen Echo "Failed"&

Format: echo "/033[word background color; font color m string/033[control code"If you simply display the font color can be fixed control code bit 0m.Format: echo "/033[word background color; font Color m string/033[0m"Word background color range: 40-

cd/usr/local/sbin///Store shell script directory.Vim guoguosql.sh//Run a PHP file every 30 seconds. File path is vim/home/wwwroot/www/domain/huitiao/web/sql.php#! /bin/bashand do Curl http://127.0.0.1:82/sql.php sleep -DoneSh/usr/local/

Linux shell directives such as-D,-F,-e are judged by :File comparison Operators-e filename true if filename exists [-e/var/log/syslog]-D filename True if filename is a directory [-d/tmp/mydir]-F filename True if filename is a regular file

PowerShell Remote Management employs a new communication protocol, Web Services for Management, referred to as Ws-man it works over HTTP or HTTPS, and the implementation of Ws-wan is primarily based on a background service: Windows Remote Management

Linux common system monitoring shell scriptsThe following is a few of my common Linux system monitoring scripts, we can change according to their own situation, I hope to give you a little help.1. Check the host network card traffic

1.Val lines=sc.textfile ("hdfs://") = = Loaded comes in as an rdd resilient distributed dataset elastic data setVal Errors=lines.filter (_.startswith ("ERROR")) # #transformationVal errors.persist () # #缓存RDDVal Mysql_error=errors.filter (_.contains

1. For loop(1) Requirements: Can read, can change. Does not require to be able to write out completely without reference. Because embedded does not need to completely re-handwriting the shell, system administrator (server OPS, Application layer

There are three ways to run a Linux program:(1), so that the file has executable permissions to run the file directly.(2), directly invoke the command interpreter execution program (Linux Shell is an interpreted language).(3). execute file using

Shell operators and basic statements1. Operators Operator Describe Example File comparison Operators -e filename True if filename exists [-e/var/log/syslog] -D filename

HDFs DFS -cat URI: Viewing the contents of a file HDFs dfs-cat HDFs Dfs-cat hdfs://mycluster/user/root/rcc1 HDFs dfs-cat file:///usr/hdp/2.4.2.0-258/hadoop/bin/RCC -ls : Check

Do you write a shell that is encrypted in the production environment? Anyway, I do not, the online environment to see the Bai, feel nothing. In fact, it seems that there are several benefits.1, simple encryption, to prevent others from looking

The first of these methods[Email protected] wyb]#Cat One.SH #!/bin/bash# Determines whether the given string is equal to read-P"Please Input a number:"number[-Z $number] &&Echo 'Input Nothing'&& exit1Len=${#number}a=`Echo$number |Cut-C1`

The previous article, I said, windows in order to change the user to its console interface, and then start from Windows Vista, plan to change this situation, so there isThe advent of PowerShell.1. Compatible Shell commandsTo be compatible with

#!/bin/bash # # Method 1a=1234;echo "$a" | [-N ' ' sed-n '/^[0-9][0-9]*$/p ' "] && echo string A is numbers the first-n isShellTest flags, test for the subsequent string "' Sed-n '/^[0-9][0-9]*$/p '", and if not NULL, the result is true. SED shows

What is 1.shell?From the user perspective: The shell is a bridge between users and LinuxFrom the programmer's Point of view: The shell itself is a program written in C languageThe shell acts as a translator, translating the commands entered by the

As a regular script operators, can find a problem, many times we are in different scripts to repeat the same piece of code. For example, we are going to use regular expressions to determine the legality of IP address, if each time to write the

On the use of test statements and related use rules, if only isolated use is difficult to have its application, of course, in the shell script can not exist in isolation, only with conditional statements and control statements and other uses to make

1. What is a functionA named block of statements; a boundary with a beginning and an end;Begin ... end2, the statement block in the shell statement(1), (statement 1; statement 2; ...)(2), {statement 1; Statement 2; ...}(3), if else elif while for(4),