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I am the only user of this machine. So I guess I will choose (1).
Could you give me an example? I would like to create a ram disk when system starts up, so that I can use it as a temp folder. The...

Can anyone briefly tell me the difference between CC and GCC? Thanks!

I want to create a ram disk when the system boots. The following is the command:
diskutil erasevolume HFS+ 'ramdisk' `hdiutil attach -nomount ram://262144`
Everytime I want to create a ram disk, I...

Hi all,

I want to execute a command when system boots. I tried to edit /etc/rc.common and add my command at the end of rc.common, but it does not work!
Anyone knows how to do it?
Thanks :)

thanks you guys, I've fixed the problem.

Sorry, I am new to MAC, I don't quite understand this. How to check whether I have a dynamic address or not?

I am sure this mac address is the only authorized one for that cable, it's fixed

I tried to use the command
sudo ifconfig en0 ether xx:xx:xx:xx:xx:xx
to do mac spoofing for internet connection in my office. It works only for 5 minutes. Every time after about 5mins, the...

I want to press "apple + T" to open a new terminal tab. This terminal tab must be in the same directory as the current one. Anyone knows how to do that?

Thanks a lot!

I downloaded a hexeditor.dmg file and then open it from command line
>>hdiutil attach hexeditor.dmg
then
>> cd /Volumns/hexeditor
I see a folder named "hexeditor.app"
I want to use 'mv...

Dear All,

Anyone knows how to start a new bash terminal from command line?

Another question: when I use "open" command (open test.pdf) to open a pdf file, the PDF reader will start up, but...

Many thanks~~

I see. Thanks a lot.
Is there any other command which does not accept input from pipe?

I want to try the unix pipe, the command is like this:
echo new | find .

the standard output of the echo should be "new", then I guess find command will use this output as input to find the file...

I see. I was using "export" to add a new path to use the "git" tool. But I didn't create any new profile file. After restarting my mac, found that I can still use git. And I checked /etc/paths,...

Thanks a lot. I found it.
So if I use export command to change the $path, it's only temporarily effective, right?

When I "echo $PATH" in terminal, I can see the PATH information.
And if I use export command to add a new path into $PATH, it also works.
I was just wondering, is there any file in MAC OS X, which...

Hi all,
I am new to unix. Anyone knows how to search a file in bash terminal, please kindly tell me.
For example, I want to search file named "myfile" in the entire machine...

Thanks a lot:)

:)This is a course project, the requirement is we'd better do something to change the protocol like congestion control, although multiple connection is obviously a very good way. But anyway, thanks a...

I have a 10Gbps network link connecting two machines A and B. I want to transfer 20GB data from A to B using TCP. With default setting, I can use 50% bandwidth. How to improve the throughput? Is...