0
votes
0answers
29 views

SIGCONT definition, continue or restart?

According to the definition from wikipedia SIGCONT The SIGCONT signal instructs the operating system to **continue** (**restart**) a process previously paused by the SIGSTOP or SIGTSTP signal. One ...
0
votes
1answer
1k views

SSH Issue on AIX 6.1

I recently upgraded the openssl version on AIXX 6.1 server. The install went fine. But now I'm unable to start new ssh sessions from puty to the server and I'm getting the error "Connection ...
0
votes
2answers
123 views

Understand what is happening in Linux with ps, top, and free

I'm running my java program on a 12 cores 24 thread machine. They have several processes that are running simultaneously. It seems that I performed too many processes so that the whole tasks made the ...
1
vote
0answers
60 views

Directory and segments in Multics operating system

In Multics OS there are different access rights in the access control list for segments (execute, read and write) and directories (status, append and modify)(book). How do segments correspond to ...
1
vote
1answer
88 views

How to create an operating system on top of Ubuntu 13.10

I want create an operating system the way Mac did, building a program on top of a Unix operating system. I am planning to make a small operating system with a small amount of functions using C. I do ...
0
votes
3answers
56 views

Extra file with Same Name Created Automatically while writing a program in unix

Some time while writing a program for example convert.c a file with same name followed by tiled(~) convert.c~ gets created in same directory. why is this so and whats really happening .please explain ...
0
votes
1answer
248 views

BASH - Run command for each line in output of previous command

All, I am want to request all network services using: networksetup -listallnetworkservices I then want to run the below command for each line in produced from the above command: networksetup ...
56
votes
13answers
6k views

Is Unix not a PC operating system? [closed]

I am doing my bachelor's degree at a university. In a written assignment, the professor posted the task: "Name three PC operating systems". Well, I went on an included a variety of OSes (Linux, ...
0
votes
1answer
416 views

Linux Mint VM in VirtualBox freezes with DISKFULL error

Disk partitioning guide for Linux Mint Debian This guides shows me how to partition my HD for Linux Mint. I'm trying to install Mint as a guest client on Windows 7 hosted VirtualBox. I used to let it ...
0
votes
1answer
115 views

Unix: how does cp work for files larger than available RAM?

Does it copy the file in batches, or does it stream the file through memory, reading and writing simultaneously?
1
vote
1answer
487 views

is there a way to create symbolic link between folders in linux that works in windows also?

I have created a link to folder in unix using ln -s command.. but if I copy the folder structures to windows box the same does not work in windows. is there a way to achieve symbolic/hard links ...
1
vote
1answer
101 views

Why does Unix deliver signals this way?

In Unix, when signals are posted, and the receiving process is running more than one thread, at first a thread is chosen to carry out the signal handling routine. I don't understand why that is ...
56
votes
8answers
15k views

Why is “Everything is a file” unique to the Unix operating systems?

I often hear people say "Unix's unique philosophy is that it treats everything as a file" or "In Unix, everything is a file". But I've never heard anyone explain why it is unique to Unix. So, why is ...
0
votes
1answer
152 views

PC vs Mac… why are things this way? [closed]

Why is it that you can run all sorts of operating systems on PCs (such as Linux, Windows, UNIX, BSDs, etc) but can't run Mac OS / Mac OS X? Conversely, why can't you run anything but Mac OS / Mac OS ...
17
votes
5answers
3k views

Does dual-booting an OS require a dual-core processor?

My friend claims that dual booting, using two different OSes, requires a multi-core or multi-threaded processor. Is this true? And if I install additional OSes, will my computer slow down any?
1
vote
3answers
198 views

Does specification mean interface?

I was wondering Generally, does specification mean interface, regardless the implementation beneath the interface? Specifically Only systems fully compliant with and certified according to ...
0
votes
2answers
358 views

Installing windows and unix on two hard drives on the same computer

I know this might be a noob question, but I need to install windows and a Unix system on the same machine. I've got two hard drives, so I can install one on each. Just not sure if maybe I would be ...
3
votes
4answers
635 views

What percentage of computers today are *nix based? [closed]

Do you know some source that has statistics/estimations about this? Any sound guesses?
21
votes
12answers
4k views

Non-Windows, non-Unix-like OS's?

Since most operating systems I've heard of besides Windows seem to derive their heritage from Unix, I've been curious whether any OS's with the following characteristics exist: Not generally ...
5
votes
5answers
228 views

Linux/Unix in Windows

What would be the best way to get the full-blown Unix/Linux bash inside Windows? I don't mean the Virtual Machine, but rather only the terminal with mounted NTFS drives. This way I could use the ...
5
votes
5answers
2k views

What is UNIX and what's UNIX-like?

Derived from this question: If opensolaris, freebsd, openbsd, netbsd are not UNIX, what is then? What confuses me more, is the fact OSX1.5+ is UNIX, while prior version of OSX weren't What is the ...
9
votes
6answers
2k views

What is the difference between Unix and Linux?

I want to know what the actual difference between Unix and Linux is. Do they share the same kernel? Is Linux built on Unix? Do programs written for Linux work on Unix and vice-versa?