unix linux commands

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Use molly-guard to protect your Linux/Unix machines from being mistakenly shut down/restarted

Test InputrebootCommands andshutdownCommand: $ sudoreboot #reboot $ shutdown-h 0 #sudoshutdown-h 0 ### running wrong command such as follows instead of ### sudo virsh reboot vm_name_here $ sudoreboot vm_name_here Result: Fig.02: Molly guard saved my butt ;\) I like molly-guard very much. Therefore, I add downstream contentapt-debian-ubuntu-common.ymlFile: - apt: name: molly-guard Yes. I used Ansible to automatically install it on all Debian and Ubuntu servers. Related: My 10 maj

What about Linux (4) -- UNIX standardization and implementation of programming in Linux

Date: 2009.5.8 Friday Content: Unix standardization and implementations (UNIX standardization and implementation) I. Partial abbreviation Anis: American National Standards Institute ISO: International Organization for Standardization International Standardization Organization IEC: International Electrotechnical Commission International Electronic Technology Commission Ii. header files defined in ISO C

Linux/Unix shell script comprehensive learning

} Nd"This will print: This is the 2ndMany variables are automatically set by the system, which will be discussed later when these variables are used.If you need to process mathematical expressions, you need to use programs such as expr (see below ).In addition to the shell variables that are generally valid in the program, there are also environment variables. Variables processed by the Export keyword are called environment variables. We will not discuss environment variables, because generally,

The essence of Unix (Linux) C Programming

, no one will take care of you. For more information about cb commands, use man cb to refer to its manual page. Of course, apart from cb, there are more and better. But cb is what you can find on any UNIX (LINUX). What's more, it is not bad. Chapter 3: Start a task Take a deep breath before starting the task! [] Are you ready for other documen

Install Mysql and windowmysql on Linux/UNIX and Windows Platforms

Install Mysql and windowmysql on Linux/UNIX and Windows Platforms For Mysql on all platforms: Download MySQL. Select the MySQL Community Server version you need and the corresponding platform. 1. Install Mysql on Linux/UNIX On Linux, we recommend that you use the RPM package

Linux Network Programming--unix local socket __arduino

use, and for TCP and UDP, the workflow is exactly the same as the network socket above.So, let's take a look at how to create and use our Unix local sockets through these APIs, and what the difference is between them, and then experience it through a simple sample program. Creating Sockets The first is the creation of the socket. Also use the socket () function. But its first argument domain is no longer af_inet or pf_inet, but Af_unix, which repre

Linux and Unix shell Programming Guide (Full HD version). pdf

Find a very detailed Linux shell script tutorial, in fact, not only the shell script programming, but also introduced the system of various commandsHttp://vdisk.weibo.com/s/yVBlEojGMQMpvThis book is divided into five parts, in detail the shell programming skills, a variety of UNIX commands and syntax, but also related to UNIX

Unix/linux interprocess communication (IPC)--Overview

OrderThe process communication methods under Linux are basically inherited from the process communication methods on the UNIX platform. The two main players at T-Lab and BSD (UC Berkeley's Berkeley Software Release Center), which have made significant contributions to the development of UNIX, have a different focus on interprocess communication. The former makes

Linux commands-linux File and permission management commands-linux permission management

10.222.1.34 4. user permission management commands in linux Ctrl + alt + (F1-F6) character Interface Ctrl + alt + F7 exit character Interface Ctrl + alt find the mouse Whoami view current user name Who-q view users Ssh remote login After ping, log on to another computer using the ssh command. Format: ssh username @ IP address exit Useradd: Add a user account Switch to supermanager mode in

20 unix/linux Command Tips

server. So I ran the following:chmod 0000 /downloadsRoot users still have access, while the LS and CD commands do not work. To restore it by:chmod 0755 /downloadsPassword-protect files in vimAfraid of the root user or someone else spying on your personal files? To try a password protection in vim, enter:Vim +x filenameAlternatively, use the: X command to encrypt your file before exiting Vim, and Vim will prompt you to enter a password.Clear garbled o

Powershell_ 0 Basic Self-study course _2_powershell and cmd and Unix/linux Shell

The previous article, I said, windows in order to change the user to its console interface, and then start from Windows Vista, plan to change this situation, so there isThe advent of PowerShell.1. Compatible Shell commandsTo be compatible with Unix/linux shell (mainly bash) commands, PowerShell provides a set of mechanisms for compatibility with Cmd.exe and bash

V. Linux/unix operation Command Accumulation "CP, MV, CAT, grep, PS"

under the use of Linux/unix, often use the text interface to set up the system or operating system, the author himself in the process of work is also constantly in touch with this command, so for This special brewing, preparation, began the writing of this article. This paper mainly records some of their usual linux/unix

SAR detail (Linux/unix Universal)

Reprint: http://www.toxingwang.com/linux-unix/2027.htmlSAR is a common performance reporting tool for Linux and UNIX, and the common command combinations are as follows:Common formats for the SAR command line: SAR [Options] [-A] [-o file] t [n] SAR [Options] [ In the command line, the N and t two para

UNIX network programming Unp.h problems and library __HTML5 in Linux

Stevens's UNIX Network programming Volume 1: Socket Networking API is a well-known UNIX network programming book. The use of a unp.h reference, if not set up the corresponding library, even if the introduction of the header file is useless. So first you have to configure the appropriate library. Basic Environment: Operating system Debian Development environment Gcc,make, and so on, first of all have C compi

What is the difference between Linux and Unix?

As Linux quickly replaces the server platform with the Unix,unix veteran, there are a number of differences between Linux and UNIX.The idea behind any UNIX version is that the vendor provides all the full service to the customer. Software development in a

(1) linux beginners: linux concepts and Common commands, common linux commands

(1) linux beginners: linux concepts and Common commands, common linux commandsLinux introduction: Linux is a free, free, and open source operating system. It is also the most famous example of open-source software. Its main purpose is to establish a

Unix/linux System Management Technical Manual Read (v)

2016.8.19 17:20-17:50HP-UX is based on System V and are tied to Hewlett-Packard ' s hardware platforms. It ' s closer to the ancestral source tree than either Solaris or AIX, but HP have kept pace with developments in the OS worl D and have added a variety of its own enhancements. Now that HP have begun supporting Linux as well, the future of HPUX was somewhat less clear.HP- UX is based on system V and is used only for HP hardware platforms. It is clo

The example in the Linux/unix system Programming manual is how to run under Linux __HTML5

Landlord rookie, from the "Linux/unix system Programming Manual" to learn, learn the procedure must first run the example to play, but did not know how to do 1 hours in the book example how to run, Baidu does not come out, casually dozen a make order drink a cup of water, found out a xx.a file, the problem solved. Take out and share with you, don't like to Spray, O (∩_∩) o haha ~ Environment: Win7 under VM

PHP protects Linux/Unix processes

script engine. Therefore, it is troublesome to make a daemon process, today, we will use Unix/Linux commands to implement the functions of our daemon process. [Principle] the nohup command in Unix is used to run the command without hanging up. at the same time, nohup puts all output of the program to the nohup in the

Install and configure ODBC in Linux/Unix

This article describes the simple principle of ODBC and how to install, configure, and program ODBC in LinuxUnix. I. ODBC principle ODBC is OpenDatabaseCo This article describes the simple principle of ODBC and how to install, configure, and program ODBC in Linux/Unix. I. ODBC principle ODBC is Open Database Co This article describes the simple principle of ODBC and how to install, configure, and progr

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