Shell

echo Color output position parameter variable a predefined variable read accept script arguments enter declare source command echo Color Output I just found out today . Echo can also output a string with a color : Echo-e "asdasd\e[1;32m ABCD \e[0m"

To sort an integer element in the ArrayList collection in ascending order: Package org.hyp.test; Import java.util.ArrayList; Import Java.util.Random; public class Mysort {private arraylist list, public arraylist getlist () {return list;} PU Blic

When using the shell under Linux, the array is occasionally used for convenience. The array is declared in the following way: array= (element1 element2 element3 ... elementn) That is, wrap the array elements of the parentheses package together,

When executing a pre-existing shell script file under a Linux system, it prompts you that the file does not exist. The general reason for this is that your shell script is written in a system that is inconsistent with your execution script, such as

http://kingphp.blog.163.com/blog/static/200423244201361632639594/ When you start a program with bash, you can use it after the program, and the implementation program runs in the background; For example: Emacs & But if you forget to enter &; but

Introduce a file in a makefile file by using include Include $ (shell./getname) and the contents of the GetName are as follows: pwd=$ (PWD); if ["${pwd#*/zloader.}" = "$pwd"];then Echo Makefile.cpci Else echo Makefile.${pwd#*/zloader.} fi I've

First need to go to the System Management-> Management plug-in, select the Optional Plug-in tab, search and find SSH slaves plugin plugin, click Download installation You may need to reboot the Jenkins after the installation is complete You can

Reprint: http://blog.chinaunix.net/uid-27571599-id-3473078.html Many people have asked me how to write shell script, how to achieve the same time to upload files to three FTP servers, how to detect the three servers are alive and so on, in fact,

#。 The first sentence in the footsteps, indicating the program used to execute the script Example: #!/bin/bash # comments, for help information or for ignoring statements that are temporarily not executed # This is a comment $ variable

It's nice to install fish shell today and install oh-my fish.But it is still a preliminary attempt and more features are not known. Install Fish sudo apt install fishSet as Default shell Chsh-s/usr/bin/fish If you want to switch back to bash,

The I-III section deals only with bash ... For others, see section IV ... I: The use of obase, IBase and BC: IBase is the input of numbers, and obase is the output of the number of the system. Well remember, I am input,o is output.Note that the F

operator!/bin/bash #基本运算符 val= ' expr 2 + 2 ' echo ' two number of sum for ${val} ' #算数运算符 #* required backslash a=10 b=20 val= ' expr ${a} + ${b} ' echo ' A + b = ${val} "val= ' expr $a-$b ' echo ' A-B: $val ' val= ' expr $a \* $b ' echo ' A *:

if [$#! = 2] Then if [$ = "H"-O $ = "H"] Then echo "Help Info" Else echo "Error:invalid argument amount! Plz Input 2 directory names! " Fi echo "**************************************************************" echo "* by Richard Zhang, Oct, 2008.

HBase provides users with a very convenient way to use it, which we call "HBase Shell."The HBase shell provides most hbase commands, which can be easily created, deleted, and modified by HBase shell users, as well as adding data to tables, listing

1. Definition of variables 1.1 Variable names can consist of letters, numbers, underscores, but numbers cannot be the first character of a variable name. 1.2 Define the value of the variable by assigning the symbol "=", e.g: Myname= ' Test ', String

If you want to compare two version number strings through the shell, such as two version numbers 1.1.2 and 1.2.1 Two versions who are relatively new.The simplest is to use the sort command. With the parameter "-V" the sort command can sort the

The contents of the log file are as follows:logid=2210608107 worker_id=140610281404160 optime=1452598610.631276 msg=service+not+found+in+share+memory service=Redis_doc_pushThe post-column output is obtained through awk, and the disadvantage is that

1, write script/root/bin/systeminfo.sh, display the current host system information, including hostname, IPV4 address, operating system version, kernel version, CPU model, memory size, hard disk size2, scripting/root/bin/backup.sh, can be

1:test variable-get 80 to determine whether it is greater than [] =test2: Use the regular expression to use [[]]3: [[]] = = Same, string do not add "" to this wildcard character=~ match, string do not add "", support extended regular

#!/bin/bashPrint_usage () {printf "Please enter an inteper \ n"}Read-p "Please input first number:" FirstnumWhile ["echo "$firstnum" | sed -r ‘s#[^0-9]##g‘"! =" $firstnum "]DoPrint_usageRead FirstnumDoneRead-p "Please input the operators:"