If you're not already familiar with UNIX fork system call, here is it's function description and its entry on Wikipedia.

Basically, in sys_fork, we need to do the follow things:

1. Copy parent's trap frame, and pass it to child thread
2. Copy parent's address space
3. Create child thread (using thread_fork)
4. Copy parent's file table into child
5. Parent returns with child's pid immediately
6. Child returns with 0

So, let's get started.

There are many ways to do this, as listed in vim wiki.

This error occurs when you try to declare a function with no arguments, and compile with -Werror=strict-prototypes, as follows:

Use the following command to install sty files, say multirow.sty, using yum:

$sudo yum -y install 'tex(multirow.sty)'

This problem is caused by the collision of chrome/chromium sandbox and Fedora's SELinux, as explained here. The same problem occurs when you open twitter (see this).

Alias is a very useful feature of shell (e.g. bash). For example, I have this line in my .bashrc:

alias ll="ls -alF | more"

In latex, the caption of figure or table is aligned left by default. Sometimes, it's not that beautiful, especially when your article is two column.

You may often find a table or figure is too big to fit into one column when your article has two columns. Use this to insert a figure (same with table) and it will save you:

From time to time, you may want to compose your own sty files to eliminate long header in your tex file. But it's boring to put you sty file in the same directory of your tex file every time since you really want your sty file to be common, i.e., can be accessed everywhere in your system.

This error occurs when I try to use latex after upgrading to fedora 16. After Google it, I find the reason may be when upgrading, the pregrade just update the system components, but not user applications, such as texlive. And since current version texlive counts on some older libraries, issues occur.