Get started with strace and debug faster
What you will see is the write line (Listing 10). In both the Perl and the C cases, what happens eventually is that a write call is made to output a string (the second argument in the method call) to the screen. In difference the case of Perl is that this is done via the interpreter, whereas in the case of C, it's the program itself that makes the call (but you can't tell this from the line, just from the context of it.)
01 write(1, "Hello World", 11) = 11
Once again, there's an exit_group call, but this time it's called on the write call (value 11, in my example), rather than on the interpreter (value 0), as in the Perl case.
This quick introduction shows some basic information that you can learn from studying system calls with strace. Also, you might want to try strace out on a "Hello World" Bash script, or you could also try running strace on short commands such as cd or pwd.
Buy this article as PDF
But if you are not using the latest Linux kernel, your system is insecure.
Home routers will give room for custom firmware but still comply with FCC rules
Frank Karlitschek will continue to lead the open source ownCloud project
“Xenial Xerus” comes with a new packages format and several improvements for the enterprise.
Linux users can now download and install the Windows code editor
New initiative will address security and interoperability concerns around container technology.
Developers can use RHEL as a development platform without a subscription fee.
Windows users will soon have native access to the Bash shell.
Improvements to SMTP will provide better guarantee of confidentiality
Graphics vendor embraces new reality in Linux graphics