Shell

This article mainly introduces 2 methods of referencing and invoking another script file in the shell script, this article introduces the syntax of the two methods, then gives the actual usages and some places to pay attention to, the friend who

This article mainly introduces 4 methods of executing the shell script and the difference introduction, this article explained the relative path way, the absolute path way, the Bash command call, the relative or the absolute way as well as the next

This article mainly introduces the Linux Shell Script Series tutorial (four): Using functions to add environment variables, this paper introduces a knowledge of environment variables, and gives the general add environment variables and the use of

Because often use the shell script, so often will write some, but I have never systematically learned the shell script, encountered problems, go to the manual, or Google, to a certain extent to find their foundation is really bad. The following is a

Learn awk, you must remember to practice, only in practice to find problems, the following on my experience in learning and practice, summed up the difference between rs,ors,fs,ofs and contact. One, RS and ors 1,rs is the record delimiter , the

Example one: Drawing special graphics Copy Code code as follows: #!/bin/bash Max_no=0 Echo-n "Enter number between (5 to 9):" Read Max_no if! [$MAX _no-ge 5-a $MAX _no-le 9]; Then echo "WTF ... I ask to enter number

Script 1: Write a login welcome script for root users: 1, with vi command in the/root directory is a new script file welcome.sh, the contents are as follows: 2, using the chmod command to welcome.sh file to increase the execution (x) permissions

Shell regular Expressions and grep awk find sed sort uniq cut One, grep 1, basic parameters GREP-[ACINV] ' search content string ' filename -A text file search -C calculates the number of matched rows found -I ignores case -N to output the

0. Initializing the Environment and OLE objects #include #include // 初始化COM环境CoInitialize(NULL);// 创建Shell对象Variant vShellOLE = Variant::CreateObject("Shell.Application"); 1. Cascade windows

650) this.width=650; "src=" https://s5.51cto.com/wyfs02/M00/94/F8/wKioL1kQPLbgWWanAABD3g9VJlg304.jpg "title=" 1.jpg "alt=" Wkiol1kqplbgwwanaabd3g9vjlg304.jpg "/>What is a shell scriptExample:#!/bin/shcd~Mkdirshell_tutCdshell_tutFor ((i=0;iTouchtest_$

1 execution of a sequence of commands[Email protected] log]# (A=2;echo $a)2[email protected] log]# {A=2;echo $a;} #注意格式的不同, with a space on the left and a semicolon ending at the far right2The redirection of a command within 2 () and {} Brackets

#!/bin/shAa= ' \e[1;31m 'bb= ' \e[1;32m 'Cc= ' \e[1;33m 'Dd= ' \e[1;34m 'Ee= ' \e[1;35m 'ff= ' \e[1;36m 'gg= ' \e[1;37m 'res= ' \e[0m 'Cat () {Echo-e "${aa} ===================================== ${res}"Echo-e "${DD} ======== 1.mysql function look ===

This article explains the advanced knowledge of shell variables.The following is a summary of the knowledge points, about the practice, this article does not involve, but also the small partners to practice their own!For special positional parameter

As a result of the work to cross-compile the application from the PC repeatedly, and through TFTP download to the ZYNQ board to run debugging. Repeated knocking commands are too cumbersome, so write a script to automate the download, change

First, write a message reminding the Python file#!/usr/bin/python#-*-coding:utf-8-*-ImportSYSImportSmtplibImportEmail.mime.multipartImportEmail.mime.textserver='smtp.163.com'Port=' -'defSendMail (server,port,user,pwd,msg): SMTP=Smtplib. SMTP () smtp.

One: Hello WorldCreate a new file, named after the. sh suffix. Each bash file begins with the first row of table names file type: #!/bin/bashThen enter the code below.For example, the output Hello World:#！ /bin/"helloworld"Run Bash file:./file name.

Security code: Taohuatan depth thousand feet, less than mountain send Me love.File descriptor (FD): The file descriptor is a non-negative integer, and when you open an existing file or create a new file, the kernel returns aFile descriptors, and

1. Structure　　2. Case studies#!/bin/bashecho "Wayne:input 1" echo "echo : Input 2" echo "We : Input 3" read-t 30-p "Input your choice:" Choca Se "$cho" in "1") echo "Wayne Love echo" ;; " 2 ")

Original: http://apps.hi.baidu.com/share/detail/31263915In the shell, the comparison between the string and the numerical method is different, pay attention to distinguishInteger comparison:-eq equals, such as: if ["$a"-eq "$b"]-ne not equal to,

The problem arises because the current release is used by executing scripts, all of which are mvn packaged, while execution causes problems.The solution checks, locks 、、、 before the script executes#!/bin/bash{flock -n 3 if [ $? -eq 1 ]then    echo