Linux

Shell Environment variablesShell is also an application, working with user modeVariable typePlasticFloating point TypeCharacter typeBoolean typeBash Variable typeLocal variable: Valid only for the current shellLocal variables: Valid only for local

Standard input: KeyboardStandard output: DisplayError Output: DisplayFD: File Descriptor: Allows the program to interact with the file, and facilitates the kernel to identify the file, each open file has a descriptorThe program interacts with the

Port number 1. View port number Use netstat -anp to see those ports being opened. The add parameter '-n ' will convert the application to port display, that is, the address of the number format, such as: nfs->2049, ftp->21, so you can open

How to prevent software package upgrades in Ubuntu If you want to upgrade the software in Ubuntu but want to keep one of them in the current state, that is, it will not be upgraded, you can use the command dpkg, aptitude or dselect to delay the

Capture a full-length webpage on a Linux terminal Instead of taking notes or sending what we see to others, we often use screenshots to help us remember. But in general, if a webpage exceeds the screen height, We need to extract multiple pieces of

Install the starter SimDock 1.3 for Ubuntu and derivative systems. SimDock is an ideal starter for lightweight desktop environments such as xfce and LXDE. It also supports GNOME Shell, Unity, and eOS's Pantheon. The latest version of simdock 1.3

Error Perl5 reported when installing git in CentOS 6.2 Error Perl5 reported when installing git in CentOS 6.2 Error 1: Usr/bin/perl Makefile. pl prefix = '/usr/local/git' INSTALL_BASE = ''-- localedir = '/usr/local/git/share/locale' Can't locate

How to use command line to manage passwords in Linux In today's popular password-based authentication on the internet, you may need or have used a password management tool to track and manage all the passwords you are using. There are a variety of

WireframeSketcher is used as a plug-in to install to Eclipse and crack files WireframeSketcher is an easy-to-use interface designer. The exe installation package on the official website is more than 60 MB. In fact, its eclipse plug-in version is

Raspberry Pi as a router I have seen many articles that make Raspberry Pi a Wireless AP, but what I want to do today is to make Raspberry Pi a router with NAT Function, my original intention was to find that my bambook was unable to access the WiFi

Necessary configuration after MyEclipse is reinstalled Necessary configuration after MyEclipse is reinstalled I. JDK locationMultiple jdk versions are allowed on each machine. You can select the jdk to be used during compilation. MyEclipse->

Advanced permission settings for files in Linux Linux System File advanced permission settings1. File hiding PropertiesChattrChattr [+-=] [ASacdi] File Name or directory+: Add a special parameter. Other existing parameters do not change.-: Delete a

Ubuntu 14.04 Docky is a software program similar to the mac OS X starter. At the same time, it can show that the weather forecast provides a lot of docklets, clock and CPU usage, in a way similar to AWN and cairo-dock. The latest available

Invisible characters and processing in Linux text My colleague provides an interface that I call through curl, write the returned results to the file, and then process the file with grep and sed. When opened in a browser or curl, it is normal and

RabbitMQ installation, configuration, and monitoring Install RabbitMQ is based on Erlang, so the Erlang environment must be configured first. Download the latest Erlang installation package from the http://www.erlang.org/download.html on erlang's

How to install and test KDE Plasma 5 in Kubuntu 14.04/14.10 KDE Plasma 5 Beta 3 has been released recently, with bug fixes and QT5 improvements. It enhances the modularity and general improvements of kdelibs, allowing users to improve their

Install and experience the open-source on-board system Automotive Grade Linux The Linux Foundation and its partners released the first version of Automotive Grade Linux this week, an open-source platform used within connected vehicles. With the

How to disable IPv6 on Ubuntu, Linux Mint, and Debian [Editor's note] the IPv4 address is exhausted and IPv6 is to be promoted, but it has been delayed. In this case, do not let it disturb our system before it is ready.IPv6 IPv6 is the next version

Solution to the Problem of Sublime Text input in Ubuntu I selected the Pyhton encoding tool and thought that the Sublime Text tool is simple and easy to use. The Vim configuration is too complicated and I gave up after a day, sublimeText has a

Problem solved when AVD cannot be started in Eclipse under Fedora 64-bit OS environment: Fedora 64-bit AVD cannot be started in Eclipse. The error is Failed to start emulator: Cannot run program "/opt/Android-sdks // tools/emulator": error = 2,