Shell

There are several ways to see what shell you are currently using, and the easiest way is to use the shell's special parameters. First, a special parameter named "$$" represents the PID of the shell instance that you are currently running. This

1. Linux Scripting Basics1.1 Basic Introduction to grammar1.1.1 StartThe program must start with the following line (must be placed on the first line of the file):#!/bin/shThe symbolic #! is used to tell the system that the parameters behind it are

A shell script is essential to day-to-day Linux system management, and if you don't write a shell script, you're not a qualified administrator. At present, many units in the recruitment of Linux system administrators, Shell script writing is a must

Shell scripts can have a very large impact when they run an exception. This article describes some of the techniques that make bash scripts robust. Using Set-u How many times did the script crash because there was no initialization of the

First, the question of the proposedAs shown in Figure 1, In the unit has a private address for the 192.168.0.0 network, the computer is through ADSL sharing access to the Internet, a computer in the home also through ADSL access to the Internet, now

In the process of server operation, often need to monitor the various resources of the server, such as: CPU load monitoring, disk usage monitoring, process number monitoring and so on, in order to alarm the system in time of abnormal, notify the

http://c.biancheng.net/cpp/shell/ what the shell is. is a command line interpreter, it provides a user with a Linux kernel to send a request to run the program's interface system-level programs, users can start with the shell, hang, stop or even

The shell can use "[]" to judge data, and "[]" is basically consistent with test. When using "[]" pay attention to three points (from Brother Bird): 1, in the brackets "[]" in each component needs to have the space bar to split. 2, in the brackets

Today, there is a problem with automating Jenkins deployments. I will kill other processes while executing the shell script, and this process is no longer executing, looking for resources and finding an article. This is because Jenkins by default

Little White's way to the shellSystem version Red Hat Enterprise Linux Server Release 7.0 【基础篇】 认识shell和基本运算符 1.什么是shell脚本：The shell is a program written in C that is a bridge for users

I. Standard input commands read and Practice 1, read basic usage[[email protected] day3]# read -p "Pls input tow num:" a1 a2Pls input tow num:1 22. Small Script Example[[email protected] day3]# vim read.shread -p "pls input two number:" var1

One of the most important functions in ansible is the ability to execute AD-HOC commands, and some people may not understand the meaning of the word ad-hoc, which means instant meaning, or arbitrary meaning.In contrast to the Ansible playbook

15.1 Understanding inputs and outputsNow you know two ways to show script output1) display on the display screen2) redirect the output file to a file15.1.1 Standard File descriptorEach object is treated as a file by the Linux system. This includes

Get-mailboxstatistics cmdlet gives Totalitemsize which is the mailbox size. But the totalitemsize doesn ' t contain the mailbox size in numbers, it ' s a PowerShell deserialized object.This command displays the mailbox size from the Value

Now you can see that it handled the escape gracefully.AttentionYou can actually use a single string as a parameter in Shell=false, but it has to be the command program itself, which is no different from defining a args in a list. If you execute the

Small Q: A person's career success, only%15 is due to his professional skills, the other%85 to rely on his interpersonalRelationship. The technique of the world, soft and hard relative, professional technology is a strong skill, and based on the

After you write a Linux shell script under Windows with Notepad, execute the syntax error near unexpected token errorsProblem principle:Online search for a long time, find the reason, the original is the problem of return, each system of the return

Getopts is a bash shell built-in command that parses a command-line pass in a shell script, passes it to a function, or passes it to a shell script that is passed to another call (option or parameter, which is explained later, getopts only supports

Before introducing what shell is, let's review the relationship between users and computer systems. We know that computer operations cannot leave hardware, but users cannot directly drive hardware, hardware drivers can only be controlled through a

How to display Chinese Characters in SSH Secure Shell Client This is a shortcoming that the SSH Secure Shell Client has not solved for many years. Both the Client and the server must be 'utf-8' encoded, now I finally know that the Windows Chinese