Shell

Brief summary: Single quotes:What you can say is what you see is what you get: the contents of a single quotation mark are output as-is, or what you see in single quotes is what you output. double quotes:The contents of the double quotation

First, what is the bean Shell BeanShell is a scripting language that conforms fully to the Java syntax specification and has its own syntax and methods. BeanShell is a loosely typed scripting language (this is similar to JS);

#!/bin/bash#createdate: 2016-11-15Date= ' date+%f ' "%h:%m"ip= ' Ifconfigeth0 | awk '/inet addr/{print $} ' | Cut-d:-f2`Echo-e "\033[032mdate: $Date \nhost: $IP \n\033[0m"echo-----------------CPU----------------Cpu_us= ' Vmstat|awk ' {print $13} '

In a shell script written by OPS, it is sometimes necessary to put some content directly into a file, such as configuring some content in a shell script to regenerate into a shell script, using the cat command and redirect symbol

Cal Command: Date display Cat/proc/meminfo: Memory usage Query Free command: Memory detail Query Arch command: CPU architecture displayDisplays the architecture of the current system, for example:#archx86_64 CAT/PROC/CPUINFO:CPU

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

Two months ago used HBase, now the most basic commands are forgotten, leave a reference ~ Go into hbase shell console$HBASE _home/bin/hbase ShellIf you have Kerberos authentication, you need to use the appropriate keytab for

I. Traditional deployment methods and advantages and disadvantages1. Traditional deployment methods(1) purely manual SCP(2) manual login git pull, svn update(3) Pure handmade xftp pull up(4) develop to hit a compressed package, RZ up; unzip2.

2016-08-10Content of the lesson:Shell Script Basics:VariableOperationBash Test (digital test, character test, file test, combination test)Read commandVariable action:1. Data storage format2, the operation of the participation3, the data range

1, write script/root/bin/systeminfo.sh, display the current host system information, including host name, IPV4 address, operating system version, kernel version, CPU model, memory size, hard disk size.Script content:650) this.width=650; "src=" Http:/

Use the key file. This assumes that host a (192.168.100.3) is used to obtain a file for Host B (192.168.100.4). Execute the following command on host A to generate the pairing key: ssh-keygen-t RSA encounters a prompt to enter by default, and the

1 Bash Information profile for the TTY login interface:/etc/issueLogon interface information for Telnet telnet:/etc/issue.net2/ETC/MOTD the contents of this file can be seen by all users including the root user when logging in, so when there is

Recently in the Zabbix, the company has six new servers. When the Zabbix client is deployed, the baby is really angry. Grandpa's always so repetitive work is also not AH. But as a war five slag, what else can be mixed with rice? Think of last year

Write a script/root/bin/yesorno.sh, prompt the user to enter Yes or no, and determine whether the user entered Yes or no, or other information #!/bin/bashread-p "Put your answer (yes or no):" Answercase $Answer iny| y| [YY] [EE]                 

[email protected] and $* the difference [Email protected]~] $vim my_fun.sh#!/bin/bash# [email protected] and $*My_fun () {echo "$#"}Echo ' The number of parameter in ' [email protected] ' is ' $ (my_fun "[email protected]")Echo ' The number of

Sort-u and Uniq can play the role of removing duplicate information, so where is the difference between them?$ cat TestJasonJasonJasonFffffJasonThe following three commands are executed separately1:sort-u TestSort-u TestFffffJason2:uniq Test$uniq

$* Include all command-line arguments as a single text value [Email protected] Include all command-line arguments as separate text values $# Number of command-line arguments $? Exit

before starting the code, let's take a look at what a shell is. Shell English is also called the shell layer. In a computer, "system" software that "provides user interface", usually refers to the command parser of the command line interface. In

Yesterday, the Dragon Boat Festival, the evening when a phone call, my friend's company, the database was two work not long phper to break, the specific is to put a field value, to the whole table into a name, of course, this is can be configured to

This article is part (iv) of the Linux Shell Series tutorial, more on the Shell Tutorial: Linux Shell Series Tutorials Like many programming languages, there are annotation symbols in the shell, and today we introduce the syntax and usage of