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Hello Don, thanks so much for your reply. I'm using Advanced Programming in the Unix Environment and Modern Operating Systems as my reference.

As for the question, I just want the parent to get...

no it's not. I'm just self-studying.

Hello, I'm currently implementing the && function in a shell using C. For example, if we input cmd1 && cmd2, then cmd2 executes only when cmd1 exits successfully. I'm thinking about:


int main()...

Hello everybody, I wonder if there's a way to make a directory that contains multiple subdirectories. For example, if I want to make /home/student under the current working directory, how do I do it?...

Hi, I also tested it today and it works fine. But here I actually want to make it automatic, which means once take a file, we can go through each line of it, extract the line and echo it to another...

I'm writing a shell script that's going to copy the contents of some files to other files line by line. Suppose there're lines starting with #, such as #include<stdio.h> in .c files, when I tried to...

actually it's a homework, so I'm supposed to do it using my own code. Thanks.

---------- Post updated at 10:00 AM ---------- Previous update was at 10:00 AM ----------

thanks a lot.
...

If there's a file called example.txt with contents:
Foo
Bar
Baz
Goo

then I need to generate a shell script that has commands to reconstruct example.txt on another machine:

echo "Foo" >>...