Shell

After the Spring boot project is packaged into an executable jar, for ease of management, we can make a script that manages the steps of starting, stopping, and so on. Instructions for use Assuming that the script is eventually named App.sh, you can

In the shell script, when comparing with parameters, such as "[$temp-eq" IPhone "]", there may be an "integer expression expected" error. This is because these parameters:-GT,-lt,-eq comparisons are both numbers and variables, so the variable temp

1.shell-sortHill sort (Shell sort) is a sort of insertion. is for the improvement of the direct insertion sort algorithm. The method is also called narrowing the incremental order, due to DL. The shell was named after it was introduced in 1959. We

$: The name of the executing script $* and $@: Return all parameters to $#: The number of arguments $_: represents the last parameter of the previous command $$: The PID $! that represents the command that was last executed: The PID $?: A flag that

1. Analog Linnux Login Shell #/bin/bashEcho-n "Login:"Read nameEcho-n "Password:"Read passwdif [$name = "CHT"-a $passwd = "abc"];thenecho "The host and password is right!"else echo "Input is error!"Fi 2. Compare the size of two

If is judged if#shell#!/bin/sha=5if [[ $a > 3 ]];then echo "$a>3"fi#写成一行if [[ $a 3";fi5>35>3If Else#shell#!/bin/sha=5if [[ $a > 8 ]];then echo "$a>8"else echo "$a5If elif Else#shell#!/bin/sha=5if [[ $a > 5 ]];then echo "$a>5"elif [ $a

1. Connect to create a database #!/bin/bashmysql="mysql -uroot -p111111"#sql="show tables from mysql"sql="create table test.user( id int unsigned auto_increment primary key, username varchar(20), password varchar(30))"$mysql -e "

The test command is commonly used to check whether certain conditions are true.Numerical test-EQ: Detects whether two numbers are equal, equal returns True-ne: Detects whether two numbers are equal, not equal returns True-GT: Detects if the left

Interactive ShellPackage Mainimport ("Golang.org/x/crypto/ssh" "Log" "OS" "FMT"Func Main () {CE:= Func (err error, MSGstring) { ifErr! =Nil {log. Fatalf ("%s Error:%v", MSG, err)} } client, err:= ssh. Dial ("TCP","192.168.154.131:22",

Shell Script (iii)A For Loop statement: (Unknown number of cycles)For Variable name Value listDoCommand sequenceDone(1) Bulk add users by Name listVim/root/user.txt?ZhangsanWangwuXiaobaivim/root/uadd.sh#!/bin/bashulist=$ (Cat/root/user.txt)For uname

#!/bin/bash-#echo do what exetuate this project \nprintf "Please input your passwd" Stty-echoread Pass 1.txt | Sort > 2.txt#echo "1 6 8 1 4 9" > 1.txt | Sort 1.txt | Tail 1.txt #cat/dev/null#!/bin/bash#cat/bin/liupeng | grep a | WC #$1#read $x

One? Using the FOR Loop statement(1) Structure of the FOR statement: When using a For loop statement, you need to specify a list of possible values for a variable, repeating the same sequence of commands for each different value until the value of

Custom log functions and pre-variables# Adirname-return Absolute dirname of given fileadirname () {odir= ' pwd '; CD ' dirname $ '; pwd; CD "${odir}";} Mynam= ' basename ' $ "' mydir= ' Adirname" $ "' myhome= '/home/shell/script" mylog_path=

The Linux shell has learned several times.But the memory is not good, always forget, chase the main reason may be not common reason!Case beginning Esac EndHere's the result.Input method does not enter the symbol is wrong, the beginning of the total

There is a period of time without crontab scheduled to perform tasks, this time to take advantage of the project implementation of the opportunity to further analyze the Crontab timing task settings encountered some difficult problems.Crontab-l View

Tag:[1]    Array    shel   done   bash    str   class   lov   nbsp    #!/bin/bash tmp= "Test,girl,boy,love " old_ifs = " $IFS " ifs = " , " arr = ($a) IFS = " $OLD _ifs " Echo" arr[0] is: ${arr[0]} " echo "arr len: ${#arr [

Reprinted please indicate the source: http://blog.csdn.net/lastsweetop/article/details/8908808 Author: Fire tianlin To avoid setting for each user, directly modify the/etc/profile file. 1. in Linux Add the following three lines: Give your ls a bit

1. system environment variables after the user logs on to the system: $ Home user's own directory $ Path: the directory to be searched during Command Execution $ TZ Time Zone $ Mailcheck the number of seconds to check whether a new letter exists

0x00 Preface The first thing for shelling is to find the OEP (oringinal entry point). Because of shelling, when the PE file is loaded into OD or other debugging software, it is usually the entry address of the shell program. So the first step of

I am studying Linux Shell script recently.Linux Shell scripting tutorial (LSST) v1.05r3But because it is in English, it is also a deep impression. Now, go to the topic. 1. How to Write shell script? A. First, use any Compiler (Vi, Vim, kwrite,...)