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  • How can I rank teams based off of head to head wins/losses

    - by TMP
    I'm trying to write an algorithm (specifically in Ruby) that will rank teams based on their record against each other. If a team A and team B have won the same amount of games against each other, then it goes down to point differentials. Here's an example: A beat B two times B beats C one time A beats D three times C bests D two times D beats C one time B beats A one time Which sort of reduces to A[B] = 2 B[C] = 1 A[D] = 3 C[D] = 2 D[C] = 1 B[A] = 1 Which sort of reduces to A[B] = 1 B[C] = 1 A[D] = 3 C[D] = 1 D[C] = -1 B[A] = -1 Which is about how far I've got I think the results of this specific algorithm would be: A, B, C, D But I'm stuck on how to transition from my nested hash-like structure to the results. My psuedo-code is as follows (I can post my ruby code too if someone wants): For each game(g): hash[g.winner][g.loser] += 1 That leaves hash as the first reduction above hash2 = clone of hash For each key(winner), value(losers hash) in hash: For each key(loser), value(losses against winner): hash2[loser][winner] -= losses Which leaves hash2 as the second reduction Feel free to as me question or edit this to be more clear, I'm not sure of how to put it in a very eloquent way. Thanks!

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  • cannot move to a subdirectory of itself

    - by fire
    I have 2 folders: /home/sphinx/articlesdb/ and: /home/sphinx/tmp/articlesdb/ I want to move and overwrite all of the files from tmp into the main folder. I am currently using: mv -f /home/sphinx/tmp/articlesdb/ /home/sphinx/ But I get this error: mv: cannot move `/home/sphinx/tmp/articlesdb/' to a subdirectory of itself, `/home/sphinx/articlesdb' It needs to do this as fast as possible so I don't want to copy. Should I remove /home/sphinx/articlesdb/ completely and then run the mv command or do I just need to tweak the command slightly?

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  • Using Copyrighted Images

    - by TMP
    I was thinking about developing a sidescrolling platformer very similar to an old Mario and Luigi game for NES. To start out I was thinking about taking the images from a site like this: http://www.mariouniverse.com/sprites/nes/smb3 Which clearly states a copyright. I was wondering how far I am allowed to take these images. I figure I'm probably allowed to use it for personal development, but what if I publish the game as an exe file and send it to some friends? I figured a definite no-no would be selling the game with the copyrighted images included. A secondary question would be whether or not I would be allowed to modify them slightly and then call them my own.

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  • Trying to understand strtok

    - by Karthick
    Consider the following snippet that uses strtok to split the string madddy. char* str = (char*) malloc(sizeof("Madddy")); strcpy(str,"Madddy"); char* tmp = strtok(str,"d"); std::cout<<tmp; do { std::cout<<tmp; tmp=strtok(NULL, "dddy"); }while(tmp!=NULL); It works fine, the output is Ma. But by modifying the strtok to the following, tmp=strtok(NULL, "ay"); The output becomes Madd. So how does strtok exactly work? I have this question because I expected strtok to take each and every character that is in the delimiter string to be taken as a delimiter. But in certain cases it is doing that way but in few cases, it is giving unexpected results. Could anyone help me understand this?

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  • pthread and recursively calling execvp in C

    - by eduke
    To begin I'm sorry for my english :) I looking for a way to create a thread each time my program finds a directory, in order to call the program itself but with a new argv[2] argument (which is the current dir). I did it successfully with fork() but with pthread I've some difficulties. I don't know if I can do something like that : #include <unistd.h> #include <stdlib.h> #include <stdio.h> #include <string.h> #include <sys/types.h> #include <sys/stat.h> #include <sys/wait.h> #include <dirent.h> int main(int argc, char **argv) { pthread_t threadID[10] = {0}; DIR * dir; struct dirent * entry; struct stat status; pthread_attr_t attr; pthread_attr_init(&attr); int i = 0; char *res; char *tmp; char *file; if(argc != 3) { printf("Usage : %s <file> <dir>\n", argv[0]); exit(EXIT_FAILURE); } if(stat(argv[2],&status) == 0) { dir = opendir(argv[2]); file = argv[1]; } else exit(EXIT_FAILURE); while ((entry = readdir(dir))) { if (strcmp(entry->d_name, ".") && strcmp(entry->d_name, "..")) { tmp = malloc(strlen(argv[2]) + strlen(entry->d_name) + 2); strcpy(tmp, argv[2]); strcat(tmp, "/"); strcat(tmp, entry->d_name); stat(tmp, &status); if (S_ISDIR(status.st_mode)) { argv[2] = tmp; pthread_create( &threadID[i], &attr, execvp(argv[0], argv), NULL); printf("New thread created : %d", i); i++; } else if (!strcmp(entry->d_name, file)) { printf(" %s was found - Thread number = %d\n",tmp, i); break; } free(tmp); } } pthread_join( threadID[i] , &res ); exit(EXIT_SUCCESS); } Actually it doesn't works : pthread_create( &threadID[i], &attr, execvp(argv[0], argv), NULL); I have no runtime error, but when the file to find is in another directory, the thread is not created and so execvp(argv[0], argv) is not called... Thank you for you help, Simon

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  • I need to speed this code at least 2 times!

    - by Dominating
    include include include include using namespace std; inline void PrintMapName(multimap pN, string s) { pair::iterator, multimap::iterator ii; multimap::iterator it; ii = pN.equal_range(s); multimap tmp; for(it = ii.first; it != ii.second; ++it) { tmp.insert(pair(it-second,1)); } multimap::iterator i; bool flag = false; for(i = tmp.begin(); i != tmp.end(); i++) { if(flag) { cout<<" "; } cout<first; if(flag) { cout<<" "; } flag = true; } cout< int main() { multimap phoneNums; multimap numPhones; int N; cinN; int tests; string tmp, tmp1,tmp2; while(N 0) { cintests; while(tests 0) { cintmp; if(tmp == "add") { cintmp1tmp2; phoneNums.insert(pair(tmp1,tmp2)); numPhones.insert(pair(tmp2,tmp1)); } else { if(tmp == "delnum") { cintmp1; multimap::iterator it; multimap::iterator tmpr; for(it = phoneNums.begin(); it != phoneNums.end();it++) { tmpr = it; if(it-second == tmp1) { phoneNums.erase(it,tmpr); } } numPhones.erase(tmp1); } else { if(tmp == "delname") { cintmp1; phoneNums.erase(tmp1); multimap::iterator it; multimap::iterator tmpr; for(it = numPhones.begin(); it != numPhones.end();it++) { tmpr = it; if(it-second == tmp1) { numPhones.erase(it,tmpr); } } } else { if(tmp =="queryname") { cintmp1; PrintMapName(phoneNums, tmp1); } else//querynum { cintmp1; PrintMapName(numPhones, tmp1); } } } } tests--; } N--; } return 0; }

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  • Can someone explain how pointer to pointer works?

    - by user3549560
    I don't really understand how the pointer to pointer works. Any way to do the same work without using pointer to pointer? struct customer{ char name[20]; char surname[20]; int code; float money; }; typedef struct customer customer; void inserts(customer **tmp) { *tmp = (customer*)malloc(sizeof(customer)); puts("Give me a customer name, surname code and money"); scanf("%s %s %d %f", (*tmp)->name, (*tmp)->surname, &(*tmp)->code,&(*tmp)->money); }

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  • Insert into ... Select *, how to ignore identity?

    - by Haoest
    I have a temp table with the exact structure of a concrete table T. It was created like this: select top 0 * into #tmp from T After processing and filling in content into #tmp, I want to copy the content back to T like this: insert into T select * from #tmp This is okay as long as T doesn't have identity column, but in my case it does. Is there anyways I can ignore the auto-increment identity column from #tmp when I copy to T? My motivation is to avoid having to spell out every column name in the Insert Into list. EDIT: toggling identity_insert wouldn't work because the pkeys in #tmp may collide with those in T if rows were inserted into T outside of my script, that's if #tmp has auto-incremented the pkey to sync with T's in the first place.

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  • TS-7800 Hangs on bootup

    - by Reid
    I have a TS-7800, and it typically boots from the SD card inserted in it. When I tried to boot it up today, it hung on the syslog line. I am now having "Read only file system" problems. What has gone wrong? Bootup console: >> Copyright (c) 2008, Technologic Systems >> Booting from SD card... . . . . >> Booting to SD Card... INIT: version 2.86 booting Starting the hotplug events dispatcher: udevd. Synthesizing the initial hotplug events...done. Waiting for /dev to be fully populated...done. mount: can't find / in /etc/fstab or /etc/mtab Cleaning up ifupdown...rm: cannot remove `/etc/network/run/ifstate': Read-only file system Loading kernel modules...done. Checking all file systems... fsck 1.37 (21-Mar-2005) ... done. none on /dev/pts type devpts (rw,gid=5,mode=620) /etc/init.d/rcS: line 39: /tmp/.clean: Read-only file system Setting up networking...done. Setting up IP spoofing protection: rp_filter. Enabling packet forwarding...done. Configuring network interfaces...ifup: failed to open statefile /etc/network/run/ifstate: Read-only file system done. Starting portmap daemon: portmap. /etc/init.d/rcS: line 39: /tmp/.clean: Read-only file system /etc/init.d/rcS: line 24: /var/run/utmp: Read-only file system rm: cannot remove `/var/lib/urandom/random-seed': Read-only file system urandom start: failed. Recovering nvi editor sessions... done. INIT: Entering runlevel: 3 Starting system log daemon: syslogd . Starting kernel log daemon: klogd. Starting MTA: open: Read-only file system touch: cannot touch `/var/lib/exim4/config.autogenerated.tmp': Read-only file system chown: cannot access `/var/lib/exim4/config.autogenerated.tmp': No such file or directory chmod: cannot access `/var/lib/exim4/config.autogenerated.tmp': No such file or directory chmod: changing permissions of `/var/lib/exim4/config.autogenerated': Read-only file system /usr/sbin/update-exim4.conf: line 260: cannot create temp file for here document: Read-only file system /usr/sbin/update-exim4.conf: line 387: /var/lib/exim4/config.autogenerated.tmp: Read-only file system 2002-01-01 01:31:36 Cannot open main log file "/var/log/exim4/mainlog": Read-only file system: euid=0 egid=0 2002-01-01 01:31:36 non-existent configuration file(s): /var/lib/exim4/config.autogenerated.tmp 2002-01-01 01:31:36 Cannot open main log file "/var/log/exim4/mainlog": Read-only file system: euid=0 egid=0 exim: could not open panic log - aborting: see message(s) above Invalid new configfile /var/lib/exim4/config.autogenerated.tmp not installing /var/lib/exim4/config.autogenerated.tmp to /var/lib/exim4/config.autogenerated Starting internet superserver: inetd. Starting OpenBSD Secure Shell server: sshd. Starting NFS common utilities: statdStarting periodic command scheduler: cron/usr/sbin/cron: can't open or create /var/run/crond.pid: Read-only file system . Starting web server (apache2)...(30)Read-only file system: apache2: could not open error log file /var/log/apache2/error.log. Unable to open logs failed! Debian GNU/Linux 3.1 ts7800 ttyS0 ts7800 login:

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  • Configuring Multiple Instances of MySQL in Solaris 11

    - by rajeshr
    Recently someone asked me for steps to configure multiple instances of MySQL database in an Operating Platform. Coz of my familiarity with Solaris OE, I prepared some notes on configuring multiple instances of MySQL database on Solaris 11. Maybe it's useful for some: If you want to run Solaris Operating System (or any other OS of your choice) as a virtualized instance in desktop, consider using Virtual Box. To download Solaris Operating System, click here. Once you have your Solaris Operating System (Version 11) up and running and have Internet connectivity to gain access to the Image Packaging System (IPS), please follow the steps as mentioned below to install MySQL and configure multiple instances: 1. Install MySQL Database in Solaris 11 $ sudo pkg install mysql-51 2. Verify if the mysql is installed: $ svcs -a | grep mysql Note: Service FMRI will look similar to the one here: svc:/application/database/mysql:version_51 3. Prepare data file system for MySQL Instance 1 zfs create rpool/mysql zfs create rpool/mysql/data zfs set mountpoint=/mysql/data rpool/mysql/data 4. Prepare data file system for MySQL Instance 2 zfs create rpool/mysql/data2 zfs set mountpoint=/mysql/data rpool/mysql/data2 5. Change the mysql/datadir of the MySQL Service (SMF) to point to /mysql/data $ svcprop mysql:version_51 | grep mysql/data $ svccfg -s mysql:version_51 setprop mysql/data=/mysql/data 6. Create a new instance of MySQL 5.1 (a) Copy the manifest of the default instance to temporary directory: $ sudo cp /lib/svc/manifest/application/database/mysql_51.xml /var/tmp/mysql_51_2.xml (b) Make appropriate modifications on the XML file $ sudo vi /var/tmp/mysql_51_2.xml - Change the "instance name" section to a new value "version_51_2" - Change the value of property name "data" to point to the ZFS file system "/mysql/data2" 7. Import the manifest to the SMF repository: $ sudo svccfg import /var/tmp/mysql_51_2.xml 8. Before starting the service, copy the file /etc/mysql/my.cnf to the data directories /mysql/data & /mysql/data2. $ sudo cp /etc/mysql/my.cnf /mysql/data/ $ sudo cp /etc/mysql/my.cnf /mysql/data2/ 9. Make modifications to the my.cnf in each of the data directories as required: $ sudo vi /mysql/data/my.cnf Under the [client] section port=3306 socket=/tmp/mysql.sock ---- ---- Under the [mysqld] section port=3306 socket=/tmp/mysql.sock datadir=/mysql/data ----- ----- server-id=1 $ sudo vi /mysql/data2/my.cnf Under the [client] section port=3307 socket=/tmp/mysql2.sock ----- ----- Under the [mysqld] section port=3307 socket=/tmp/mysql2.sock datadir=/mysql/data2 ----- ----- server-id=2 10. Make appropriate modification to the startup script of MySQL (managed by SMF) to point to the appropriate my.cnf for each instance: $ sudo vi /lib/svc/method/mysql_51 Note: Search for all occurences of mysqld_safe command and modify it to include the --defaults-file option. An example entry would look as follows: ${MySQLBIN}/mysqld_safe --defaults-file=${MYSQLDATA}/my.cnf --user=mysql --datadir=${MYSQLDATA} --pid=file=${PIDFILE} 11. Start the service: $ sudo svcadm enable mysql:version_51_2 $ sudo svcadm enable mysql:version_51 12. Verify that the two services are running by using: $ svcs mysql 13. Verify the processes: $ ps -ef | grep mysqld 14. Connect to each mysqld instance and verify: $ mysql --defaults-file=/mysql/data/my.cnf -u root -p $ mysql --defaults-file=/mysql/data2/my.cnf -u root -p Some references for Solaris 11 newbies Taking your first steps with Solaris 11 Introducing the basics of Image Packaging System Service Management Facility How To Guide For a detailed list of official educational modules available on Solaris 11, please visit here For MySQL courses from Oracle University access this page.

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  • MEB Support to NetBackup MMS

    - by Hema Sridharan
    In MySQL Enterprise Backup 3.6, new option was introduced to support backup to tapes via SBT interface. SBT stands for System Backup to Tape, an Oracle API that helps to perform backup and restore jobs via media management software such as Oracle's Secure Backup (OSB). There are other storage managers like IBM's Tivoli Storage Manager (TSM) and Symantec's Netbackup (NB) which are also supported by MEB but we don't guarantee that it will function as expected for every release. MEB supports SBT API version 2.0 In this blog, I am primarily going to focus the interface of MEB and Symantec's NB. If we are using tapes for backup, ensure that tape library and tape drives are compatible. Test Setup 1. Install NB 7.5 master and media servers in Linux OS. ( NB 7.1 can also be used but for testing purpose I used NB 7.5)2. Install MEB 3.8 also in Linux OS.3. Install NB admin console in your windows desktop and configure the NB master server from there. Note: Ensure that you have root user permission to install NetBackup. Configuration Steps for MEB and NB Once MEB and NB are installed, Ensure that NB is linked to MEB by specifying the library /usr/openv/netbackup/bin/libobk.so64 in the mysqlbackup command line using --sbt-lib-path. Configure the NB master server from windows console. That is configure the storage units by specifying the Storage unit name, Disk type, Media Server name etc.  Create NetBackup policies that are user selectable. But please make sure that policy type is "Oracle".  Define the clients where MEB will be executed. Some times this will be different host where MEB is run or some times in same Media server where NB and tapes are attached. Now once the installation and configuration steps are performed for MEB and NB, the next part is the actual execution.MEB should be run as single file backup using --backup-image option with prefix sbt:(it is a tag which tells MEB that it should stream the backup image through the SBT interface) which is sent to NB client via SBT interface . The resulting backup image is stored where NB stores the images that it backs up. The following diagram shows how MEB interacts with MMS through SBT interface. Backup The following parameters should also be ready for the execution,    --sbt-lib-path : Path to SBT library specific to NetBackup MMS. SBT lib for NetBackup  is in /usr/openv/netbackup/bin/libobk.so64    --sbt-environment: Environment variables must be defined specific to NetBackup. In our example below, we use     NB_ORA_SERV=myserver.com,    NB_ORA_CLIENT=myserver.com,    NB_ORA_POLICY=NBU-MEB    ORACLE_HOME = /export/home2/tmp/hema/mysql-server/ ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ./mysqlbackup --port=13000 --protocol=tcp --user=root --backup-image=sbt:bkpsbtNB --sbt-lib-path=/usr/openv/netbackup/bin/libobk.so64 --sbt-environment="NB_ORA_SERV=myserver.com, NB_ORA_CLIENT=myserver.com, NB_ORA_POLICY=NBU-MEB, ORACLE_HOME=/export/home2/tmp/hema/mysql-server/” --backup-dir=/export/home2/tmp/hema/MEB_bkdir/ backup-to-image ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Once backup is completed successfully, this should appear in Activity Monitor in NetBackup Console.For restore,  image contents has to be extracted using image-to-backup-dir command and then apply-log and copy-back steps are applied. ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ./mysqlbackup --sbt-lib-path=/usr/openv/netbackup/bin/libobk.so64  --backup-dir=/export/home2/tmp/hema/NBMEB/ --backup-image=sbt:bkpsbtNB image-to-backup-dir-----------------------------------------------------------------------------------------------------------------------------------Now apply logs as usual, shutdown the server and perform restore, restart the server and check the data contents. ./mysqlbackup   ---backup-dir=/export/home2/tmp/hema/NBMEB/  apply-log ./mysqlbackup --datadir=/export/home2/tmp/hema/mysql-server/mysql-5.5-meb-repo/mysql-test/var/mysqld.1/data/  --backup-dir=/export/home2/tmp/hema/MEB_bkpdir/ innodb_log_files_in_group=2 --innodb_log_file_size=5M --user=root --port=13000 --protocol=tcp copy-back The NB console should show 'Restore" job as done. If you don't see that there is something wrong with MEB or NetBackup.You can also refer to more detailed steps of MEB and NB integration in whitepaper here

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  • zram trimming by writing zero pages

    - by qdot
    I'm using ZRAM as a backing block device for /tmp filesystem in the following manner: echo 8000000000 > /sys/block/zram0/disksize mkfs.ext4 -O dir_nlink,extent,extra_isize,flex_bg,^has_journal,uninit_bg -m0 \ -b 4096 -L "zram0" /dev/zram0 mount -o barrier=0,commit=240,noatime,nodev,nosuid /dev/zram0 /tmp chmod aogu+rwx /tmp It works out reasonably well for me - however, there is an issue here - when files are removed, they are not zero'ed, so the ZRAM does not remote the compressed pages. Obviously running dd if=/dev/zero of=/tmp/ZERO bs=1M count={free-space-some-rest}; rm /tmp/ZERO clears it up in the ZRAM - it gets notified of zero-pages and shrinks the store. How can I get ext4 to zero used pages on delete? Also, any other suggestions on how to optimize it?

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  • Error starting mod_wsgi

    - by Hardgood
    When I run the start-server command on mod_wsgi-experess, I get this output: Server URL : http://localhost:8000/ Server Root : /tmp/mod_wsgi-localhost:8000:0 Server Conf : /tmp/mod_wsgi-localhost:8000:0/httpd.conf Error Log : /tmp/mod_wsgi-localhost:8000:0/error_log httpd: Syntax error on line 2 of /tmp/mod_wsgi-localhost:8000:0/httpd.conf: module version_module is built-in and can't be loaded The line 2 in the httpd.conf in the tmp folder that it is referring to says the following. It was automatically created by mod_wsgi: LoadModule version_module '/usr/local/apache/modules/mod_version.so' I am running Apache 2.2.21 on CentOS 5.10. I am stumped. Any ideas how to get over this obstacle? I should mention that this is a cross-post of a StackOverflow question, after I realized that SO was probably not the best place to ask it.

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  • Why there are many guest accounts?

    - by Radu Radeanu
    After I saw this answer, I realized that there are many guest accounts on my system: grep guest /etc/passwd guest-jzXeRx:x:117:127:Guest,,,:/tmp/guest-jzXeRx:/bin/false guest-l5dAPU:x:118:128:Guest,,,:/tmp/guest-l5dAPU:/bin/false guest-FdSAkw:x:119:129:Guest,,,:/tmp/guest-FdSAkw:/bin/false guest-eBU0cU:x:121:131:Guest,,,:/tmp/guest-eBU0cU:/bin/false Moreover, in this moment there is nobody logged as guest, but if somebody will login as guest, a new guest account is created - why, since there are already other guest accounts? After the new guest will log out, his account will be deleted. But why the other guest accounts remain? For what use/purpose? It doesn't mind me at all this guest account, but I want to know if it is okay to delete them manually.

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  • Can't create a valid symlink under VMWare HGFS

    - by Alexander Gladysh
    Host: OS X 10.6.5 VMWare Fusion: 3.1.2 Guest: Ubuntu x86 10.10 $ uname -a Linux ubuntu 2.6.35-24-generic #42-Ubuntu SMP Thu Dec 2 01:41:57 UTC 2010 i686 GNU/Linux I can not create a symlink, readable from the Guest OS anywhere in the directory, mounted with hgfs: /mnt/hgfs/projects/tmp$ touch aaa /mnt/hgfs/projects/tmp$ ln -s aaa bbb /mnt/hgfs/projects/tmp$ less bbb bbb: No such file or directory /mnt/hgfs/projects/tmp$ ls -la total 6 drwxr-xr-x 1 501 users 136 2010-12-28 18:12 . drwxr-xr-x 1 501 users 8602 2010-12-28 18:12 .. -rw-r--r-- 1 501 users 0 2010-12-28 18:12 aaa lrwxr-xr-x 1 501 users 3 2010-12-28 18:12 bbb - aaa /mnt/hgfs/projects/tmp$ readlink bbb aaa The same symlink is perfectly accessible in OS X host. Is there a workaround for this?

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  • script not run after reboot from /etc/rc3.d

    - by yael
    I create symbolic link to the file - /etc/rc3.d/platform.bash from /var/tmp/platform.bash ln -s /var/tmp/platform.bash /etc/rc3.d/platform.bash script exist under /var/tmp : -rwxr-xr-x 1 root root 58442 Aug 30 08:49 platform.bash view from /etc/rc3.d : lrwxrwxrwx 1 root root 31 Aug 30 06:33 S99platform.bash -> /var/tmp/platform.bash my target is to run platform.bash after reboot ( on solaris 10 OS ) from some reason the script platform.bash not run after reboot ? please advice what I need to check in order to verify the problem ? my script ( platform.bash ) #!/bin/bash echo test > /var/tmp/log.txt

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  • Add autorandr before kdm starts

    - by Serge Tarkovski
    I want to add autorandr before kdm starts. Autorandr works well within KDE, however, in kdm I still have ugly 1024x768 resolution when my external monitor is connected. I tried adding autorandr --change to /etc/kde4/kdm/Xsetup: #! /bin/sh # Xsetup - run as root before the login dialog appears #xconsole -geometry 480x130-0-0 -notify -verbose -fn fixed -exitOnFail -file /dev/xconsole & /sbin/initctl -q emit login-session-start DISPLAY_MANAGER=kdm /usr/local/bin/autorandr --change >> /tmp/autorandr echo "Xsetup finished" >> /tmp/xsetup-finished A debug message in /tmp/xsetup-finished appears correctly. /tmp/autorandr is empty (so it seems autorandr runs without errors). I also tried to move autorandr --change line before /sbin/initctl -q emit login-session-start DISPLAY_MANAGER=kdm with no effect. P.S. Of course, autorandr profiles I created under KDE session, are in my home folder, but Xsetup script runs under root, so I created a symlink from my ~/.autorandr to /root/.autorandr.

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  • Upgrade to Ubuntu 13.10 in a VirtualBox: Gnome desktop not working

    - by Xavier
    I had Ubuntu 13.04 running in a VirtualBox (the host is WinXP). I've upgraded it to 13.10 but I've some issues: Gnome desktop is not working correctly (I can log in but the main menu bar remains empty - I can only log out with CTRL-ALT-BACKSPACE) I cannot build and install the VirtualBox Guest Addons: When trying to build it, it says: me@virtuntu:/etc/init.d$ sudo ./vboxadd setup Removing existing VirtualBox DKMS kernel modules ...done. Removing existing VirtualBox non-DKMS kernel modules ...done. Building the VirtualBox Guest Additions kernel modules The headers for the current running kernel were not found. If the following module compilation fails then this could be the reason. Building the main Guest Additions module ...done. Building the shared folder support module ...fail! (Look at /var/log/vboxadd-install.log to find out what went wrong) Doing non-kernel setup of the Guest Additions ...done. In the log file, I see the following error: /tmp/vbox.0/dirops.c:292:5: error: unknown field ‘readdir’ specified in initializer .readdir = sf_dir_read, ^ /tmp/vbox.0/dirops.c:292:5: warning: initialization from incompatible pointer type [enabled by default] /tmp/vbox.0/dirops.c:292:5: warning: (near initialization for ‘sf_dir_fops.flush’) [enabled by default] make[2]: *** [/tmp/vbox.0/dirops.o] Erreur 1 make[1]: *** [_module_/tmp/vbox.0] Erreur 2 make: *** [vboxsf] Erreur 2 Creating user for the Guest Additions. Anyone had a similar experience? Any clue to help me? Thanks a lot!

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  • Figure out what non-symlink path would be?

    - by David Mackintosh
    On Linux, if I've cd'd around and am now in a directory, is there a way to figure out what the real path to that directory is if I had not used a symbolic link to get there? Consider: $ pwd /home/dave/tmp $ mkdir -p 1/2/3/4/5 $ ln -s 1/2/3/4/5 5 $ cd 5 $ pwd /home/dave/tmp/5 Or: $ pwd /home/dave/tmp $ mkdir -p 1/2/3/4/5 $ ln -s 1/2/3/4 4 $ cd 4/5 $ pwd /home/dave/tmp/4/5 Is there any way to figure out that /home/dave/tmp/5 is really /home/dave/1/2/3/4/5 ?

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  • Is QtQuick.Controls available on Ubuntu 13.10

    - by javascript is future
    I was looking to do UI development in QML, and I really want it to look native. I found the QtQuick.Controls (http://qt-project.org/doc/qt-5.1/qtquickcontrols/qtquickcontrols-index.html), but when I try make a simple application, it tells me that QtQuick.Controls isn't installed. main.qml: import QtQuick 2.1 import QtQuick.Controls 1.0 Rectangle { height: 200 width: 200 } terminal: $ qmlscene main.qml file:///tmp/main.qml:2 module "QtQuick.Controls" is not installed Also, I downloaded the source from https://qt.gitorious.org/qt/qtquickcontrols/source/stable, ran qmake && make, but this returned the following output: cd src/ && ( test -e Makefile || /usr/lib/i386-linux-gnu/qt5/bin/qmake /tmp/qtquickcontrols/src/src.pro -o Makefile ) && make -f Makefile make[1]: Går til katalog '/tmp/qtquickcontrols/src' cd controls/ && ( test -e Makefile || /usr/lib/i386-linux-gnu/qt5/bin/qmake /tmp/qtquickcontrols/src/controls/controls.pro -o Makefile ) && make -f Makefile make[2]: Går til katalog '/tmp/qtquickcontrols/src/controls' g++ -c -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -O2 -fvisibility=hidden -fvisibility-inlines-hidden -std=c++0x -fno-exceptions -Wall -W -D_REENTRANT -fPIC -DQT_NO_XKB -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_NO_DEBUG -DQT_PLUGIN -DQT_QUICK_LIB -DQT_QML_LIB -DQT_WIDGETS_LIB -DQT_NETWORK_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I/usr/share/qt5/mkspecs/linux-g++ -I. -I/usr/include/qt5 -I/usr/include/qt5/QtQuick -I/usr/include/qt5/QtQml -I/usr/include/qt5/QtWidgets -I/usr/include/qt5/QtNetwork -I/usr/include/qt5/QtGui -I/usr/include/qt5/QtGui/5.1.1 -I/usr/include/qt5/QtGui/5.1.1/QtGui -I/usr/include/qt5/QtCore -I/usr/include/qt5/QtCore/5.1.1 -I/usr/include/qt5/QtCore/5.1.1/QtCore -I.moc/release-shared -o .obj/release-shared/qquickaction.o qquickaction.cpp qquickaction.cpp:49:39: fatal error: private/qguiapplication_p.h: No such file or directory #include <private/qguiapplication_p.h> ^ Is there some PPA I could use, or do I have to wait for Trusty to get out, before I can use native controls from Qt? Regards

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  • Am I misunderstanding chown and chmod?

    - by isomorphismes
    I want to either extend the size of my guest partition or figure out how to copy stuff from the guest partition to my normal /home directory. (Because of some other problems I can only run Xorg as guest, but I can log into virtual console as myself or root.) Here's the motivation: I want to torrent a large file. It's larger than my guest filesystem. But I have plenty of space on my real drive, I just can't log into it graphically. So I tried to set up a "pipe" to get the file out of the tmpfs. I did: su -u myself #catch mkdir ~/receiver_dir sudo su cd /tmp/guest-lkj567UIO/ #throw ln -s mario_pipe /home/myself/receiver_dir chown -R guest-lkj567UIO /home/myself/receiver_dir chown -R guest-lkj567UIO /tmp/guest-lkj567UIO/mario_pipe chmod -R a+rw /home/myself/receiver_dir chmod -R a+rw /tmp/guest-lkj567UIO/mario_pipe su -u guest-lkj567UIO cd /tmp/guest-lkj567UIO cd mario_pipe touch something #success! However, when I try to torrent to /tmp/guest-lkj567UIO/mario_pipe, Transmission says I don't have write permissions. But it looks like I just wrote there? And that everybody (a+rw) can write there in fact? Maybe this indicates I don't actually understand chown and chmod but nothing from their man pages pops out.

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  • X Session from Mac

    - by tekknolagi
    How can I log into an X server from Mac OS X? I know that ssh -X username@host will log me in and I will have the capability to run X applications. On Cygwin/X you can log in and have a whole X session from your computer... and it will look something like this: How can I replicate this? Using this batch script: @echo off SET DISPLAY=127.0.0.1:0.0 SET REMOTE_HOST=%1 IF "%REMOTE_HOST%" == "" SET REMOTE_HOST=10.0.0.1 SET CYGWIN_ROOT=\cygwin SET RUN=%CYGWIN_ROOT%\bin\run -p /usr/bin SET PATH=.;%CYGWIN_ROOT%\bin;%PATH% SET XAPPLRESDIR= SET XCMSDB= SET XKEYSYMDB= SET XNLSPATH= if not exist %CYGWIN_ROOT%\tmp\.X11-unix\X0 goto CLEANUP-FINISH attrib -s %CYGWIN_ROOT%\tmp\.X11-unix\X0 del %CYGWIN_ROOT%\tmp\.X11-unix\X0 :CLEANUP-FINISH if exist %CYGWIN_ROOT%\tmp\.X11-unix rmdir %CYGWIN_ROOT%\tmp\.X11-unix if "%OS%" == "Windows_NT" goto OS_NT echo startxdmcp.bat - Starting on Windows 95/98/Me goto STARTUP :OS_NT REM Windows NT/2000/XP echo startxdmcp.bat - Starting on Windows NT/2000/XP :STARTUP %RUN% XWin -query tekknolagi.dyndns.org -clipboard -lesspointer -scrollbars -screen 0 1050x1655@2 -screen 1 1680x985@1

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  • Log "date -s" command

    - by LinuxPenseur
    Hi, I know that the date -s <STRING> command sets the time described by the string STRING. What i want is to log the above command whenever it is used to set the time into the file /tmp/log/user.log. In my Linux distribution the logging is done by syslog-ng. I already have some logs going into /tmp/log/user.log. This is the content of /etc/syslog-ng/syslog-ng.conf in my system for logging into /tmp/log/user.log destination d_notice { file("/tmp/log/user.log");}; filter f_filter10 { level(notice) and not facility(mail,authpriv,cron); }; log { source(s_sys); filter(f_filter10); destination(d_notice); }; What should i do so that date -s command is also logged into /tmp/log/user.log

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  • Kernel module compilation fails when installing vmware tools

    - by nekooee
    When I install WMWare tools, I get this error for vmhgfs: /tmp/vmware-root/modules/vmhgfs-only/filesystem.c:47:28: fatal error: linux/smp_lock.h: No such file or directory compilation terminated. compilation terminated. make[2]: *** [/tmp/vmware-root/modules/vmhgfs-only/filesystem.o] Error 1 make[1]: *** [_module_/tmp/vmware-root/modules/vmhgfs-only] Error 2 make[1]: Leaving directory `/usr/src/linux-headers-3.0.0-12-generic' make: *** [vmhgfs.ko] Error 2 make: Leaving directory `/tmp/vmware-root/modules/vmhgfs-only' If you wish to have the shared folders feature, you can install the driver by running vmware-config-tools.pl again after making sure that gcc, binutils, make and the kernel sources for your running kernel are installed on your machine. These packages are available on your distribution's installation CD. And /mnt/hgfs is empty when sharing. If I run vmware-hgfsclient in a terminal, I get the list of shared folders but /mnt/hgfs is empty.

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  • Inverse projection: question about w coordinate

    - by fayeWilly
    I have to perform in shader an inverse projection from a u/v of a render target. What I do is: Get NDC as 2*(u,v,depth) - 1 Then world space as tmp = (P*V)^-1 * (NDC,1.0); world space = tmp/tmp.w; This apparently works, but I am confused about the w division there. Why this work? Shouldn't be a multiplication by a w somewhere (as in the "forward" pipeline there is the perpsective division?) Thank you, Faye

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