Delete the OS x login item in the preferences do not see the startup item

Mac OS

Sometimes，We add a startup item but can not find in the "Preferences" in the "Users & Groups" and "Login Items" in the，This is for the future to remove these startup items increased when a lot of trouble - like those pkg package can not be uninstalled like。On how to uninstall the OS X package pkg，I have written two articles，You can easily comeHereandHereLook。

All right.，With regard to the startup items，In addition to viewing preferences among foreign，You can also go to the following directory View

/Library/LaunchDaemo[……]

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Mac OS X resolved socket.error: [Errno 48] Address already in use Port occupation problem

Mac OS Taught you science Internet

Foreword

Using the GAE engine in OS x to science onlinegoagentorwallproxy，May occur during the boot process the following error then the service does not start successfully。

Reason

Actually it is because you have to start the same or similar services for the port，usually，Start with Python on the Mac directly，Causes an exit is not complete，You can't GUI by clicking on the "exit" button to stop，Backstage[……]

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How to set up FTP server on OS x

Mac OS

Foreword

In the new version of OS X,，No FTP server，Preferences among，Share file-sharing inside retaining only Apple's own AFP, and is compatible with Microsoft samba，This allows sometimes need to transfer files to and some of the equipment becomes tricky。

Recommended Software

The software is quite good，full functioning，From the user to the virtual directory permissions to everything，You can definitely cope with the vast majority of demand for FTP equipment，Such as ZTE EPON C200, etc.，Huawei Cisco God horse。

Software interface as shown in the Preamble - This is a free[……]

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unix / linux programming study notes- Open file descriptors and function

Linux

To talk about unix / linux for file operations in these functions，These functions for linux basically meet our requirements in any document，
First talk about the open function
In linux you want to operate on the file must first open the file and then the corresponding processing，Why should we do it? That is because the process and not directly manipulate files between，To process the file first to use the system call between processes and documents connected to a resume operations，This connection becomes a file descriptor，Called as a process leading to the kernel by the kernel[……]

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Update Flash cause Safari to crash Remedy

Mac OS

The new updated version of the flash in some cases require a lot of courage，For example, yesterday，After routing update Flash version of Safari has led to the collapse can not afford。

If you're not careful and I encountered the same problem，Then you can followHereThe official way to manually remove the plug，If you bother to look into the points，Now I write that

The brief resolution process

Use uninstall to uninstall Flash

If your system is 10.6-10.9 version，Then you can try to download the official uninstaller to uninstall Flash。

[Downlin[……]

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ZTE c200 listen to the multicast configuration process summary records

Exchange of Experience The internet

[……]

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Little understanding of Unix System Structure

Linux

UnixLittle understanding of architecture

It can be defined as a software operating system in the strict sense，The software controls the computer hardware resources，Provider operating environment for personal understanding of hardware and software wealthy。We call such software kernel (kernel），It is relatively small，Located in the center of the environment

Kernel system call interface is called (system calls) Shared libraries built on top of the system call interface，Applications can either use the shared library，You can also use the system call。

ShellIt is a special application[……]

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Access、Trunk and Hybrid and this VLAN

The internet

Three modes switch port

On the switch，There are three commonly used configuration mode，Respectively Access (Access)，Trunk (trunk or trunk) as well as Hybrid (Hybrid)，These three interfaces operating mode determines the corresponding interface for processing the attitude data packets on the switch。Nowadays，Routing to elaborate on these three models。

label

Since the switch has divided the virtual LAN VLAN function is，Therefore, it is allowed to switch into the Ethernet frame data marked with a tag，VLAN is used to identify different data flows，To be forwarded。This is what we often[……]

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