Posts Tagged ‘unix’

Say I have a UNIX script and during execution, I would like to know the pid. How do I do that? Thanks.
What if I have the script running a number of times, they would all show up with the same script name, how can I tell which pid is the current running script?

I have a unix script abc.sh that will be scheduled by crontab to run every hour. My script abc.sh could potentially run longer than an hour. In such a case, I do not want the next run of crontab to start another copy of abc.sh to run. How can I prevent the next copy of abc.sh from starting in the event the first run has not completed? ie how to identify if my unix script is running? Thank you

GNU? What is that? All I know about it is, it is about Linux (or unix).. (I dont really know sorry)

I’m on my second year of Computer Science. I know Java, C, UNIX system programming, SQL, XML. I’ve figured that C++ is the most used language for game programming.

So where can I start? Should I join one of those game modding teams? Should I take one of those free online courses?

Thanks in advance!

What are the operational differences between Linux and UNIX? Why would a programmer choose one over the other? What about software selection and ease of programming (with already basic knowledge of programming, and wanting to dive in to open source)?

In terms of Linux, what makes things like Red Hat cost money and things like Ubuntu not? Is pay-for OS based on Linux better quality than freely distributed OS? What is the best choice for Linux-or-Unix OS for a budding programmer?

How do the developers get paid if nobody buys the software, just get it free, and that too with source code? I can understand it about amateur software developers. But I recently heard that Sun is coming out with Open Source Unix this year. How will they profit from this? If not, how will they survive?

i searched and found that GNU is acronym for GNU’s Not Unix. but what is the G acronym for? i dont understand meaning of GNU’s Not Unix.

Umm i dont want something too complicated, i would sure like something that could help me analyze how students are standing using their grades and other factors. An open source program would be best, im trying to stick to the unix environment now.