see below. On Mon, May 7, 2012 at 1:01 AM, Johan Grönqvist <johan.gronqv...@gmail.com>wrote:
> 2012-05-07 04:16, Kjetil brinchmann Halvorsen skrev: > > >> Do you use anything that may affect sage's ability to open ports? >> >> >> My problem with answering is that I don't really know anything about >> "ports" . I guess that has something to do with networking, >> but nbothing more! Any hints about books/papers/netplaces to read to >> learn about "ports"? >> >> > This problem is probably beyond me, but someone else might answer, and you > have the other thread going on the same problem. I do not expect that the > text below will solve your problem, but perhaps it helps you understand the > error message better: > > > My (possibly incorrect) intuition about ports: > > We have networking and we need a way to organize the programs that want to > connect to the network. Let's imagine that the network card has 2^16 > different "connection points" that the programs can connect to, and let's > call them ports. When a program connects to another (on the same or a > different machine), it needs to communicate with a port, and the responding > program needs to "listen" to that port. As an example, my web server > listens to incoming requests from others, and it does so on port 80. Thus > if you want to see on of the web pages it serves, you send a request to > that computer, and send it to port 80 on that computer. This also works for > local networking, it does not matter if the request to port 80 came from > the outside or from another program running on the same machine. > > The sage notebook runs in a web server, and you connect to it locally (or > remotely if the notebook is configured to respond to requests from other > machines, which it is probably not, for security purposes. > > You can see some info about open ports by running "netstat -t -p". My sage > notebook runs on port 8000. > Here is my output from sudo netstat -t -p kjetil@kjetil:~$ sudo netstat -t -p [sudo] password for kjetil: Active Internet connections (w/o servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 kjetil:38929 mia04s04-in-f9.1e:https ESTABLISHED 4994/firefox-bin tcp 0 0 kjetil:38531 ec2-75-101-130-133:http TIME_WAIT - tcp 0 0 kjetil:36936 mia05s08-in-f11.1:https ESTABLISHED 4994/firefox-bin tcp 0 0 kjetil:45665 mia04s04-in-f3.1e:https TIME_WAIT - tcp 0 0 kjetil:53141 yh-in-f105.1e100.:https ESTABLISHED 4994/firefox-bin tcp 0 0 kjetil:35941 mia04s04-in-f21.1:https ESTABLISHED 4994/firefox-bin tcp 0 0 kjetil:46639 pc-178-224-45-190:https ESTABLISHED 4881/skype tcp 0 0 kjetil:48800 mia04s04-in-f5.1e:https TIME_WAIT - tcp 0 0 kjetil:38928 mia04s04-in-f9.1e:https ESTABLISHED 4994/firefox-bin tcp 0 0 kjetil:53132 yh-in-f105.1e100.:https TIME_WAIT - tcp 0 0 kjetil:57393 157.55.235.148:https ESTABLISHED 4881/skype tcp 0 0 kjetil:38530 ec2-75-101-130-133:http TIME_WAIT - tcp 0 0 kjetil:44755 pc-78-210-83-200.:https ESTABLISHED 4881/skype tcp 0 0 kjetil:52682 TGV.ANYCAST-FO.CHI:http ESTABLISHED 4994/firefox-bin tcp 0 0 kjetil:45666 mia04s04-in-f3.1e:https TIME_WAIT - tcp 0 0 kjetil:35912 mia04s04-in-f21.1:https ESTABLISHED 4994/firefox-bin kjetil@kjetil:~$ Kjetil > > > One example output line of the netstat command is > > tcp 0 0 johan-laptop.loca:36666 87.117.201.130:ircd ESTABLISHED > 28025/xchat-gnome > > Saying that I have a tcp port open (there are two kinds, tcp and udp and > sage uses tcp), from my local machine, port 36666 to 87.117.201.130 port > ircd (I assume this indicated the standard port for an irc client) and the > port was opened by the program xchat-gnome. > > The wikipedia page is at <http://en.wikipedia.org/wiki/** > Port_%28computer_networking%29<http://en.wikipedia.org/wiki/Port_%28computer_networking%29> > **> > > > > kjetil@kjetil:~/sage/sage-5.0.**rc0$ ./sage --ipython >> WARNING: Configuration file ipythonrc not found. Ignoring request. >> ------------------------------**------------------------------ >> Traceback (most recent call last): >> File >> "/home/kjetil/sage/sage-5.0.**rc0/local/lib/python2.7/site-** >> packages/IPython/ConfigLoader.**py", >> line 66, in load >> fname = filefind(fname,incpath) >> File >> "/home/kjetil/sage/sage-5.0.**rc0/local/lib/python2.7/site-** >> packages/IPython/genutils.py", >> line 554, in filefind >> ' not found in current or supplied directories:' + `alt_dirs` >> IOError: File'ipythonrc' not found in current or supplied >> directories:u'/home/kjetil/.**ipython' >> >> WARNING: Problems loading configuration file 'ipythonrc' >> Starting with default -bare bones- configuration. >> ------------------------------**------------------------------** >> --------------- >> ImportError Traceback (most recent call >> last) >> >> /home/kjetil/sage/sage-5.0.**rc0/local/lib/python2.7/site-** >> packages/IPython/ipmaker.pyc >> in force_import(modname, force_reload) >> 61 reload(sys.modules[modname]) >> 62 else: >> ---> 63 __import__(modname) >> 64 >> 65 >> >> ImportError: Bad magic number in /home/kjetil/.ipython/ipy_** >> user_conf.pyc >> WARNING: /home/kjetil/.ipython/ipy_**user_conf.py does not exist, please >> run %upgrade! >> WARNING: Loading of ipy_user_conf failed. >> >> Python 2.7.2 (default, May 3 2012, 22:40:27) >> Type "copyright", "credits" or "license" for more information. >> >> IPython 0.10.2 -- An enhanced Interactive Python. >> ? -> Introduction and overview of IPython's features. >> %quickref -> Quick reference. >> help -> Python's own help system. >> object? -> Details about 'object'. ?object also works, ?? prints more. >> >> In [1]: 3**33 >> >> Out[1]: 5559060566555523 >> >> In [2]: >> >> > From what Keshav said, this appears rather harmless for the functionality, > but a bit annoying. You get a warning, but the thing tested actually works. > > As all tests pass for my wheezy, let me know if there is anything I can do > to see where we differ. I do have ipython 0.12 (which is 0.11 or newer, and > I do not get the error. > > root@johan-laptop:/home/johan# aptitude show ipython > Paket: ipython > Tillstånd: installerat > Automatiskt installerade: nej > Version: 0.12-1 > > > > Regards > > Johan > > > -- > To post to this group, send email to sage-support@googlegroups.com > To unsubscribe from this group, send email to sage-support+unsubscribe@** > googlegroups.com <sage-support%2bunsubscr...@googlegroups.com> > For more options, visit this group at http://groups.google.com/** > group/sage-support <http://groups.google.com/group/sage-support> > URL: http://www.sagemath.org > -- "If you want a picture of the future - imagine a boot stamping on the human face - forever." George Orwell (1984) -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
