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  • Updating Python on Ubuntu system

    - by efficiencyIsBliss
    I want to update the Python build on my Linux box, but the only way I know how to do it is uninstalling the current version and installing the new one. My system is already up to date (I updated yesterday). I wanted to know if there is a way to update a specific program from the command line, like sudo apt-get update <program-name>. I know this command doesn't exist, but I'm hoping something equivalent does.

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  • Is there a way to backup AD and DNS in Windows 2008 without backing up the whole Volume?

    - by EtherDragon
    I would like to know if there is a (cost free) way to backup Windows Server 2008 Active Directory and DNS settings without using Windows Server Backup. The problem stems from not having a seperate volume available to store the resulting backup from Windows Server Backup. I examined the command line options with wbadmin and it also expects the destination to be a dedicated volume for the backup. ~ED

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  • Big Oh Notation - formal definition.

    - by aloh
    I'm reading a textbook right now for my Java III class. We're reading about Big-Oh and I'm a little confused by its formal definition. Formal Definition: "A function f(n) is of order at most g(n) - that is, f(n) = O(g(n)) - if a positive real number c and positive integer N exist such that f(n) <= c g(n) for all n = N. That is, c g(n) is an upper bound on f(n) when n is sufficiently large." Ok, that makes sense. But hold on, keep reading...the book gave me this example: "In segment 9.14, we said that an algorithm that uses 5n + 3 operations is O(n). We now can show that 5n + 3 = O(n) by using the formal definition of Big Oh. When n = 3, 5n + 3 <= 5n + n = 6n. Thus, if we let f(n) = 5n + 3, g(n) = n, c = 6, N = 3, we have shown that f(n) <= 6 g(n) for n = 3, or 5n + 3 = O(n). That is, if an algorithm requires time directly proportional to 5n + 3, it is O(n)." Ok, this kind of makes sense to me. They're saying that if n = 3 or greater, 5n + 3 takes less time than if n was less than 3 - thus 5n + n = 6n - right? Makes sense, since if n was 2, 5n + 3 = 13 while 6n = 12 but when n is 3 or greater 5n + 3 will always be less than or equal to 6n. Here's where I get confused. They give me another example: Example 2: "Let's show that 4n^2 + 50n - 10 = O(n^2). It is easy to see that: 4n^2 + 50n - 10 <= 4n^2 + 50n for any n. Since 50n <= 50n^2 for n = 50, 4n^2 + 50n - 10 <= 4n^2 + 50n^2 = 54n^2 for n = 50. Thus, with c = 54 and N = 50, we have shown that 4n^2 + 50n - 10 = O(n^2)." This statement doesn't make sense: 50n <= 50n^2 for n = 50. Isn't any n going to make the 50n less than 50n^2? Not just greater than or equal to 50? Why did they even mention that 50n <= 50n^2? What does that have to do with the problem? Also, 4n^2 + 50n - 10 <= 4n^2 + 50n^2 = 54n^2 for n = 50 is going to be true no matter what n is. And how in the world does picking numbers show that f(n) = O(g(n))? Please help me understand! :(

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  • htaccess redirect loop

    - by Web Developer
    I am having issue in the last line of the below code which is causing the redirect loop (at least that's what i think so) RewriteEngine On RewriteBase /jgel/ RewriteCond %{REMOTE_ADDR} !^172\.172\.121\.142 RewriteCond %{REQUEST_URI} !maintainance\.php RewriteCond %{REQUEST_URI} !resources/(.*)$ [nc] RewriteRule ^(.*)$ maintenance.php [R=307,L] I have tried this and this too doesn't work RewriteEngine On RewriteBase / RewriteCond %{REMOTE_ADDR} !^172\.172\.121\.142 RewriteCond %{REQUEST_URI} !maintainance\.php RewriteCond %{REQUEST_URI} !resources/(.*)$ [nc] RewriteRule ^(.*)$ /jgel/maintenance.php [R=307,L]

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  • NotePad++ - Why Does Finding ^ Not Work

    - by ChloeRadshaw
    I am trying to move away from TextPad and I just cant get reg expressions like ^ and $ to be replaced. I have definitely ticked the regular expression box What am I doing wrong EDIT: I am trying to find the start of a new line - In textpad it is find '^' and ensure reg ex is enabled. With notepad++ it does not do that. It just says not found

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  • Remove some junk characters from server console log.

    - by Jayakrishnan T
    Please look in to the picture,here am trying to open(with vi editor) my server console log file(around 100MB) and it takes more than two minutes to open with so many special characters.after deleting the first line (means typing "dd")then i can easily view the file and size of the file is also reduced very much.My server OS is RHEL 5.4 and jboss is running in to it. Please help me to avoid such junk characters coming to my server console log files and it helps me to save my valuable space in server.

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  • power management of USB-enclosed hard drives

    - by intuited
    With a typical USB hard drive enclosure, is the full range of drive power management functionality available? In what may be an unrelated matter: is it possible to suspend a PC without unmounting an attached USB-powered drive, and then remounting it on resume? This is the behaviour I'm currently seeing (running Ubuntu linux 10.10). Are there certain models or brands that provide more complete control over this aspect of drive operation? My Friendly Neighbourhood Computer Store carries (part of) the Vantec Nexstar product line.

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  • Why use hosts file?

    - by dK3
    My company has a staging site and we access it by a url like this: www.example.com Until today I did not realise that I had a line in my hosts file which said: 192.0.2.0 www.example.com (the ip is fake here) now when I try to access this site through ip , I cannot get access.. why is this the case? We even own the domain we are using so I do not see the reason why we are using a hosts file and more over, why I cannot access the site through simple IP (by the way, we are using an internal IP)

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  • Restoring MySQL dump - ERROR 2006 (HY000)

    - by matcheek
    I am just trying to restore a mysql dump. Below are the command and error message. Can anybody give me some clues how to approach this? 10:54:16 Restoring C:\Users\matcheek\Documents\dumps\Dump20120405-1.sql Running: mysql.exe "--defaults-extra-file="d:\temp\tmpbvhy4i.cnf" " --host=127.0.0.1 --user=root --port=3306 --default-character-set=utf8 --comments < "C:\\Users\\matcheek\\Documents\\dumps\\Dump20120405-1.sql" ERROR 2006 (HY000) at line 271: MySQL server has gone away

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  • Adding group + items in Windows Explorer's pop-up menu?

    - by OverTheRainbow
    An application I use regularly is command-line based, and I would like to add the most used commands in the Windows Explorer's context menu that pops up when right-clicking on a file or folder. From what I read, a lot of programs in that menu are COM applications. Is there an easier way to add commands to the menu, as an alternative to opening a DOS box and typing commands? Ideally, it should work for XP, Vista, and 7.

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  • pretty-printing IP packets

    - by pts
    I'm receiving IP packets using the SLIP protocol, and I'd like to pretty-print them similarly to how tcpdump does it. My program is able to decode the SLIP protocol and create a single string containing an IP packet if necessary. I couldn't find any relevant tcpdump command-line flags except for -r. The file format is documented at http://www.tcpdump.org/pcap/pcap.html , but it looks a bit too complicated. Is there a Linux tool for pretty-printing raw IP packets?

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  • preg_match in .bat file to flusk image url.

    - by marcell22
    welcome, I have problem with .bat script on windows. I use wget to download html stats page, now i have to find (in html source) url like this http://www.example.com/stats/367895.jpeg The 367895 is a random generated number. and download chart jpeg. I think i can't do this in .bat, Do You know any external command line application what i could trigger from .bat and show in output finded url ? Regards

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  • Change keyboard mapping (Input Source) from terminal in OS X

    - by simont
    I'd like to change the keyboard mapping from command-line (Terminal) in Mac OS X Lion (10.7). I can manually set it (System Preferences - Language & Text - Input Sources), and there's a nice option that lets me use different input sources for different documents, but I'd like to bind it to a key under zsh to easily swap between Qwerty and Dvorak layouts (I'm learning Dvorak, and having the option to switch easily would be sensational).

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  • Is there a way for a user to disable an AlertDialog completely?

    - by NewGuyChris
    In the app I'm making, I have an "if" statement where if two strings are saved to a certain string, an AlertDialog pops up. These strings will stay the same for some users, thus having this AlertDialog constantly pop up whenever they launch the activity where the ALertDialog is set to appear. Code (I have no setNegativeButton as of yet): private void SetWarning() { AlertDialog.Builder alert = new AlertDialog.Builder(this); alert.setTitle("Warning!"); alert.setMessage(R.string.Warning); alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { //No action needed; just close the AlertDialog. } }); alert.show(); } Here is a segment of my code that makes this AlertDialog appear: SharedPreferences sharedPreferences = getSharedPreferences("MY_PREF", MODE_PRIVATE); String s = sharedPreferences2.getString("MEM1", ""); String s2 = sharedPreferences2.getString("MEM2", ""); if(s.equals("String1") && s2.equals("String2")) SetWarning(); Is there a way to make an "alert.setNegativeButton" method where if the user clicks it, the AlertDialog will NEVER appear again? I'm thinking of maybe somehow implementing another SavedPreferences somehow so it saves the users selection and will then prevent the AlertDialog from ever appearing again. So far, to no luck. I've searched to find nothing, other than people asking how to disable buttons in an AlertDialog. Thank you! New updated code: alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { //set sharedpreferences boolean called DONTSHOWAGAIN to true; SharedPreferences sharedPreferences2 = getSharedPreferences("MY_PREF", MODE_PRIVATE); Boolean dontShowAgain = sharedPreferences2.getBoolean("dontShowAgain ", false); SharedPreferences.Editor ed = sharedPreferences2.edit(); ed.putBoolean("dontShowAgain", true); ed.commit(); } }); alert.show(); } private void StringWarning() { SharedPreferences sharedPreferences2 = getSharedPreferences("MY_PREF", MODE_PRIVATE); String s = sharedPreferences2.getString("MEM1", ""); String s2 = sharedPreferences2.getString("MEM2", ""); if(s.equals("String1") && s2.equals("String2")){ if(!dontShowAgain){ SetWarningExamConflict(); } }

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  • Is there a way to backup AP and DNS in Windows 2008 without backing up the whole Volume?

    - by EtherDragon
    I would like to know if there is a (cost free) way to backup Windows Server 2008 Active Directory and DNS settings without using Windows Server Backup. The problem stems from not having a seperate volume available to store the resulting backup from Windows Server Backup. I examined the command line options with wbadmin and it also expects the destination to be a dedicated volume for the backup. ~ED

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  • Eject LiveCD + Reboot

    - by JPerkSter
    We use LiveCD's alot in my line of work. Whether it be fscking file systems, recovering data from a customer to rm'd his server, etc. I'm looking for a quick way to eject the CDROM and reboot the server. Does anyone have any one-liners to do this or any other suggestions? Using 'eject' doesn't work most of the time, from what I've tested / used. We're using RHEL / Cent on most of our servers if that helps :D

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  • Search for text of register in function

    - by dotancohen
    I am writing a VIM function which should search for the text found in register a. In VIM I would start a search with / then press Ctrlr and finish off with a then Return. However this line in the function is not working: execute "/<c-r>a<Return>" It is throwing this error: E486: Pattern not found: <c-r>a<Return> How do I enter the literal Ctrlr into the function? Thanks.

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  • function to org-sort by three (3) criteria: due date / priority / title

    - by lawlist
    Is anyone aware of an org-sort function / modification that can refile / organize a group of TODO so that it sorts them by three (3) criteria: first sort by due date, second sort by priority, and third sort by by title of the task? EDIT: If anyone can please help me to modify this so that undated TODO are sorted last, that would be greatly appreciated -- at the present time, undated TODO are not being sorted: ;; multiple sort (defun org-sort-multi (&rest sort-types) "Multiple sorts on a certain level of an outline tree, or plain list items. SORT-TYPES is a list where each entry is either a character or a cons pair (BOOL . CHAR), where BOOL is whether or not to sort case-sensitively, and CHAR is one of the characters defined in `org-sort-entries-or-items'. Entries are applied in back to front order. Example: To sort first by TODO status, then by priority, then by date, then alphabetically (case-sensitive) use the following call: (org-sort-multi '(?d ?p ?t (t . ?a)))" (interactive) (dolist (x (nreverse sort-types)) (when (char-valid-p x) (setq x (cons nil x))) (condition-case nil (org-sort-entries (car x) (cdr x)) (error nil)))) ;; sort current level (defun lawlist-sort (&rest sort-types) "Sort the current org level. SORT-TYPES is a list where each entry is either a character or a cons pair (BOOL . CHAR), where BOOL is whether or not to sort case-sensitively, and CHAR is one of the characters defined in `org-sort-entries-or-items'. Entries are applied in back to front order. Defaults to \"?o ?p\" which is sorted by TODO status, then by priority" (interactive) (when (equal mode-name "Org") (let ((sort-types (or sort-types (if (or (org-entry-get nil "TODO") (org-entry-get nil "PRIORITY")) '(?d ?t ?p) ;; date, time, priority '((nil . ?a)))))) (save-excursion (outline-up-heading 1) (let ((start (point)) end) (while (and (not (bobp)) (not (eobp)) (<= (point) start)) (condition-case nil (outline-forward-same-level 1) (error (outline-up-heading 1)))) (unless (> (point) start) (goto-char (point-max))) (setq end (point)) (goto-char start) (apply 'org-sort-multi sort-types) (goto-char end) (when (eobp) (forward-line -1)) (when (looking-at "^\\s-*$") ;; (delete-line) ) (goto-char start) ;; (dotimes (x ) (org-cycle)) )))))

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  • Ubuntu 10.04 - install-info error during update

    - by user33684
    I'm using Ubuntu 10.04 beta 1. When I try to update & upgrade I get the following error: Setting up install-info (4.13a.dfsg.1-5ubuntu1) ... /etc/environment: line 4: LC-ALL=en_US.UTF-8: command not found dpkg: error processing install-info (--configure): subprocess installed post-installation script returned error exit status 127 Errors were encountered while processing: install-info Does anyone know how to fix this? Thanks

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  • Is there any very bare minimal ftp server for ubuntu that wouldn't conflict with other installed servers?

    - by Disco
    I have installed proftpd with mod-sql modules; i need to have a ftp server that would run on another port (and use a separate authentication scheme) Whenever i try to install vsftpd or pureftpd it simply removes proftpd and dependencies; i'm guessing it's to prevent having conflicts ... Is there any 'very small' ftp server; like run from command line that I could use ? I've searched all around but cannot find ... Any help would be appreciated

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  • Virtual Memory and SSD

    - by Zombian
    While studying for the A+ Exam I was reading about SSD's and I thought to myself that if you had a mobo with a low RAM limit you could use a dedicated SSD purely for Virtual RAM. I looked up some info on line and the info I found said that this was a poor practice but didn't explain why. Why shouldn't SSD's be used for Virtual Memory and what are your thoughts on a dedicated Virtual Memory drive? Thank you!

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  • "pdf_open: Not a PDF 1.[1-5] file." when typesetting TeX file in TextMate

    - by Manti
    I have a TeX file, which is typeset by XeLaTeX. The file has \includegraphics{coverimage.eps} on the first page, and coverimage.eps is located in the same directory as the TeX file. OS: MacOS 10.6.5, TextMate 1.5.10, xelatex 3.1415926-2.2-0.9997.4 (TeX Live 2010) If I run xelatex doc.tex in console, file compiles without errors, and eps file is included. If I typeset it in TextMate (xelatex engine is selected in preferences), I get the following error: ** WARNING ** pdf_open: Not a PDF 1.[1-5] file. ** WARNING ** Failed to include image file "./coverimage.eps" ** WARNING ** >> Please check if ** WARNING ** >> rungs -q -dNOPAUSE -dBATCH -sPAPERSIZE=a0 -sDEVICE=pdfwrite -dCompatibilityLevel=%v -dAutoFilterGrayImages=false -dGrayImageFilter=/FlateEncode -dAutoFilterColorImages=false -dColorImageFilter=/FlateEncode -sOutputFile=%o %i -c quit ** WARNING ** >> %o = output filename, %i = input filename, %b = input filename without suffix ** WARNING ** >> can really convert "./coverimage.eps" to PDF format image. ** WARNING ** pdf: image inclusion failed for "coverimage.eps". ** WARNING ** Failed to read image file: coverimage.eps ** WARNING ** Interpreting special command PSfile (ps:) failed. ** WARNING ** >> at page="1" position="(107.149, 124.566)" (in PDF) ** WARNING ** >> xxx "PSfile="coverimage.eps" llx=0 lly=0 urx=408 ury=526 rwi=3809 and there is no image included in the resulting file (but text looks ok). I am not sure whether it is the error of xelatex or TextMate LaTeX bundle. What I tried to do: As I said, xelatex doc.tex from console works. The exact command line that TextMate uses is: xelatex -interaction=nonstopmode -file-line-error-style -synctex=1 But it works from console too. If I convert the image to pdf (and fix the .tex file accordingly), typesetting from TextMate works too. I tried running rungs with parameters specified in the error message, and got valid .pdf file with image as a result. I compared .log files from typesetting in TextMate and in console, they are absolutely identical except for this error message (in particular, version of xelatex is the same). Does anyone know what can cause this? Please tell me if you need any additional information. Thank you in advance.

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  • Java kills sound on Karmic

    - by hasen j
    Every time I run a java application, one of two things happen: Either I lose sound in all other programs (even after quitting the java app) or if some other application is already playing sound, the said java app doesn't have sound Usually this can be fixed by running pulseaudio --kill from the command line, but it doesn't always work. Is there a way to fix this problem? This didn't happen before the upgrade to karmic. Other info: The java I'm using is Sun's Java

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  • Python cannot go over internet network

    - by user1642826
    I am currently trying to work with python networking and I have reached a bit of a road block. I am not able to network with any computer but localhost, which is kind-of useless with what networking is concerned. I have tried on my local network, from one computer to another, and I have tried over the internet, both fail. The only time I can make it work is if (when running on the server's computer) it's ip is set as 'localhost' or '192.168.2.129' (computers ip). I have spent hours going over opening ports with my isp and have gotten nowhere, so I decided to try this forum. I have my windows firewall down and I have included some pictures of important screen shots. I have no idea what the problem is and this has spanned almost a year of calls to my isp. The computer, modem, and router have all been replaced in that time. Screen shots: import socket import threading import socketserver class ThreadedTCPRequestHandler(socketserver.BaseRequestHandler): def handle(self): data = self.request.recv(1024) cur_thread = threading.current_thread() response = "{}: {}".format(cur_thread.name, data) self.request.sendall(b'worked') class ThreadedTCPServer(socketserver.ThreadingMixIn, socketserver.TCPServer): pass def client(ip, port, message): sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.connect((ip, port)) try: sock.sendall(message) response = sock.recv(1024) print("Received: {}".format(response)) finally: sock.close() if __name__ == "__main__": # Port 0 means to select an arbitrary unused port HOST, PORT = "192.168.2.129", 9000 server = ThreadedTCPServer((HOST, PORT), ThreadedTCPRequestHandler) ip, port = server.server_address # Start a thread with the server -- that thread will then start one # more thread for each request server_thread = threading.Thread(target=server.serve_forever) # Exit the server thread when the main thread terminates server_thread.daemon = True server_thread.start() print("Server loop running in thread:", server_thread.name) ip = '12.34.56.789' print(ip, port) client(ip, port, b'Hello World 1') client(ip, port, b'Hello World 2') client(ip, port, b'Hello World 3') server.shutdown() I do not know where the error is occurring. I get this error: Traceback (most recent call last): File "C:\Users\Dr.Frev\Desktop\serverTest.py", line 43, in <module> client(ip, port, b'Hello World 1') File "C:\Users\Dr.Frev\Desktop\serverTest.py", line 18, in client sock.connect((ip, port)) socket.error: [Errno 10061] No connection could be made because the target machine actively refused it Any help will be greatly appreciated. *if this isn't a proper forum for this, could someone direct me to a more appropriate one.

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