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• Is there a way to recover a file that I have deleted but is still open somewhere?

  - by George Edison

  This question is related to How to recover deleted files? but it is slightly different in nature. Suppose I have a file named ~/something open in a text editor. Further suppose that I open a terminal and run the following command while the file is still open in the text editor: rm ~/something This will delete the file. Now suppose that I changed my mind and wanted to get the file back. The file is still open in the text editor, so it hasn't been removed from the disk or filesystem yet. Is there any way to recover it?

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• How to install g++ in Ubuntu 14.04?

  - by Apoorva sahay

  I have recently installed ubuntu 14.04 in virtual box. Now I want to install g++ 4.7 in it. I am trying this command in terminal but its not working. sudo apt-get install g++-4.7 Reading package list... Done Building dependency tree Reading state information... Done E: Unable to locate package g++-4.7 E: Couldn't find any package by regex 'g++-4.7' But I find gcc was there with Ubuntu 14.04 installation itself. How could I install g++ in ubuntu 14.04 and any version of g++ abouve 4.7.2 is fine with me.

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• How can I reinstall GRUB Bootloader on MBR after installing Kubuntu?

  - by Agnes

  I installed Ubuntu, but then installed Kubuntu over it (formated Ubuntu Partition) because Ubuntu is not compatible with almost any hardware on my PC. Problem is I'm stuck with an old GRUB that says Ubuntu in the options because in my attempts to make it compatible with my hardware I got an old Grub with an image with an Earth that says Debian. How can I replace the GRUB with the one Kubuntu is supposed to install. I don't want to modify just the text, or the command to install on /sdaX, I want to actually re-write the MBR with the latest grub (reinstall the bootloader). Thanks.

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• Where to put git "remote" repo on purely local git setup?

  - by Mittenchops

  I overwrote and lost some important scripts and would like to setup version control to protect my stuff. I've used git before, and am familiar with commands, but don't understand where I would put my "remote" repository on an install set up on my own machine---the place I push/pull to. I don't intend to share or access remotely, I just want a little source control for my files. I followed the instructions here for setting up my staging area: http://stackoverflow.com/questions/4249974/personal-git-repository But where do I put git "remote" repo on purely local git setup? How does the workflow work then? On the command in the above: git remote add origin ssh://myserver.com:/var/repos/my_repo.git Where should I put/name something like this? If I have multiple different projects, would they go in different places? I'm running 11.10.

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• VMMap - awesome memory analysis tool

  VMMap is a process virtual and physical memory analysis utility. It shows a breakdown of a process's committed virtual memory types as well as the amount of physical memory (working set) assigned by the operating system to those types. Besides graphical representations of memory usage, VMMap also shows summary information and a detailed process memory map. Powerful filtering and refresh capabilities allow you to identify the sources of process memory usage and the memory cost of application features. Besides flexible views for analyzing live processes, VMMap supports the export of data in multiple forms, including a native format that preserves all the information so that you can load back in. It also includes command-line options that enable scripting scenarios. VMMap is the ideal tool for developers wanting to understand and optimize their application's memory resource usage. span.fullpost {display:none;}

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• The plugin of munin is always timed out

  - by haoX

  I want to use munin to make a graph of ttyACM0 in Linux, but munin can not create the graph. I found some information in "munin-node.log". it shows that "Service 'temperature' timed out". So I changed timeout to 60 or 120 in /munin/plugin-conf.d/munin-node, but it does not work. It's also timed out. Here is part of my code: if [ "$1" = "config" ]; then echo 'graph_title Temperature of board' echo 'graph_args --base 1000 -l 0' echo 'graph_vlabel temperature(°C)' echo 'graph_category temperature' echo 'graph_scale no' echo 'graph_info This graph shows the temperature of board' for i in 1 2 3 4 5; do case $i in 1) TYPE="Under PCB" ;; 2) TYPE="HDD" ;; 3) TYPE="PHY" ;; 4) TYPE="CPU" ;; 5) TYPE="Ambience" ;; esac name=$(clean_name $TYPE) if [ "$TYPE" != "NA" ]; then echo "temp_$name.label $TYPE"; fi done exit 0 fi for i in 1 2 3 4 5; do case $i in 1) TYPE="Under PCB" VALUE=$(head -1 /dev/ttyACM0 | awk '{print $1}') ;; 2) TYPE="HDD" VALUE=$(head -1 /dev/ttyACM0 | awk '{print $2}') ;; 3) TYPE="PHY" VALUE=$(head -1 /dev/ttyACM0 | awk '{print $3}') ;; 4) TYPE="CPU" VALUE=$(head -1 /dev/ttyACM0 | awk '{print $4}') ;; 5) TYPE="Ambience" VALUE=$(head -1 /dev/ttyACM0 | awk '{print $5}') ;; esac name=$(clean_name $TYPE) if [ "$TYPE" != "NA" ]; then echo "temp_$name.value $VALUE" fi

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• My computer boots up with Ubuntu: How can I tell what's on my hard disk?

  - by Larry Harson

  I've acquired an old laptop (Acer TravelMate 4050 with an Italian keyboard) that boots up with the following options: Ubuntu, with Linux 3.0.0-12-generic Ubuntu, with Linux 3.0.0-12-generic (recovery mode) Memory test (memtest86+) Memory test (memtest86+, serial console 115200) When I choose the first option, the screen just goes blank with a flashing cursor. But I can go into grub command mode by typing 'c'. Now, I want to know what operating system is installed, and the files stored on my computer, so how do I do this? What can I do to maximise the use of this computer in its current state?

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• Configuring php on Ubuntu server

  - by mk_89

  I have been following this tutorial http://www.howtoforge.com/installing-apache2-with-php5-and-mysql-support-on-ubuntu-12.04-lts-lamp And I have got to the part where I am running a simple test to determine whether php has been installed properly the installation went fine, I installed php5 using the following command apt-get install php5 libapache2-mod-php5 and I then restarted the server. to see whether php5 has been installed I did the following created a file vi /var/www/info.php edited the file <?php phpinfo(); ?> after trying to run it on my server I get a 404 Not Found error. What could be the problem?

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• G5 quad core will not boot from Ubuntu CD

  - by Steve Howard

  I have a PPC G5 Quad Core with Leopard on one hard drive and I want to install Ubuntu on a second hard drive. The second drive is installed and formatted as a Mac OS Extended (Journaled) drive. I have had no success booting from a CD or DVD with various PPC versions of Ubuntu using any of the suggested keys such as "C, Option, or anything else. Booting into open firmware doesn't work as the system can't find the \install\yaboot file. I am using various CD's burned as iso disk images, but none will boot. I have reset the PRAM, etc, to no avail. Beginning to get very frustrated. Can someone shed some light and provide me with a command line in open firmware that will work, or else direct me to a confirmed PPC bootable version of Ubuntu please? I'd appreciate any help you can provide....

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• Kill a process by giving dir

  - by Gerculy Robert

  I'm working on a Control Panel for SA-MP. Firstly I want to make a start and a close button. The start button is done, I'm having some problems with the close button. I will host multiple server on same server with different IP. My problem is , when I send a ssh command kill samp03srv kills all running apps. My question : Is there any way to kill an app using cd ? Something like : pkill -9 -u root samp03svr cd ~~~~~/samp/RolePlay Thanks.

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• Using apt-get from Canada

  - by Advant Edge

  I am using Ubuntu Server 12.04 LTS, and until yesterday, everything was quite peachy. I have installed several packages (MySQL, apache2) and to my knowledge have those configured correctly. Upon configuration of phpMyAdmin, I found that I was missing the directory path /etc/phpmyadmin, which got me thinking about the install. I am new to Ubuntu, so I guess I missed the message telling me that I did not download phpMyAdmin successfully. Anyway, trying to use apt-get yesterday/today results in "Failed to fetch..." messages, even if just to run sudo apt-get update. Some notable details: ···no GUI, command line only (sudo apt-get gksu fails, go figure) ···can ping 4.2.2.2, so I know the internet is out there (somewhere) ···this is a dedicated computer, using Samba to share files with Windows, which does work ···attempted to edit my /sources.list file, for various American/Canadian mirror, to no effect ···ensured I have correct DNS settings in /etc/networks/interfaces I'm not sure where along the way it happened, but I seem to have lost connections to repositories... :) Any advice (including GO BACK TO WINDOWS) is appreciated.

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• Gnome question> Nautilus only starts as root user

  - by user7978

  Hello. I am running Ubuntu 10.04 62-bit. When I attempt to start Nautilus from the command line, it does not appear -- although a PID is generated. As root/sudo, I can start Nautilus fine. One note: I run e16 as the windows manager, so I do not use Nautilus to draw my desktop. However, even under this configuration, Nautilus used to run fine as a "regular" user. The permissions for Nautilus are the same as the other packages in /usr/bin. I believe this is a Gnome issue, but I'm fumbling at this point.

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• upgrade from ubuntu 12.04 to 12.10 failed, now loads "grub rescue"

  - by Greg

  I attempted to upgrade from 12.04 to 12.10 last night. Installation seemed to go fine, and this morning I had a message like "restart now to complete installation". So I restart, get an initial "Loading Operating System ..." message, followed by "error: file not found. Then it kicks into "grub rescue" mode. Previously I have this running as a dual boot (window 7) and I just ran the upgrade to 12.10 via the update manager in ubuntu. Any ideas on what is going on here, or what the error means? I know my way around the command line, but this is above my pay grade. Thanks for any advice.

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• I try install dhcp3-server, but /etc/init.d/dhcp3-server file is missing. Whats going on?

  - by hydroparadise

  I've found several how-to's that essentially go through the same process in setting up DHCP. Here's a link that has the list of step needed install and setup DHCP. I follow all the steps and find that the sudo /etc/init.d/dhcp3-server restart portion returns command not found only to reveal the the file doesn't even exist. I've installed (sudo apt-get install dhcp3-server) and uninstalled (sudo apt-get remove dhcp3-server) two or three times. I'm pretty sure my config files are good because I've had to check them three times. But I don't think I'm to that point of being able to see them action it. I cant control the process. Why is the file missing? How is it supposed to get there? Help?

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• Update Grub on Squeeze - Kernel downgrade due VMware Server

  - by vodoo_boot

  I happen to run into various problems regarding grub and kernels. I don't really care about the kernel internas. All I want is VMware server in that dedicated root-server. 1.) What is a bzImage vs. vmlinuz? kaze:~# ls /boot/ System.map-2.6.32-5-amd64 bzImage-2.6.33.2 config-2.6.33.2 initrd.img-2.6.32-5-amd64 System.map-2.6.33.2 bzImage-2.6.35.6 config-2.6.35.6 vmlinuz-2.6.32-5-amd64 System.map-2.6.35.6 config-2.6.32-5-amd64 grub I updated my menu.lst (grub2): timeout 5 default 0 fallback 1 title 2.6.32.5 kernel (hd0,1)/boot/vmlinuz-2.6.32-5-amd64 root=/dev/sda2 panic=60 noapic acpi=off title 2.6.35.6 kernel (hd0,1)/boot//bzImage-2.6.35.6 root=/dev/sda2 panic=60 noapic acpi=off title 2.6.32.3 kernel (hd0,1)/boot//bzImage-2.6.33.2 root=/dev/sda2 panic=60 noapic acpi=off That doesn't do well... I think the vmlinuz file is missing initrd or so. Dunno. In fact I don't give too much about kernel boot voodoo as long as it works. update-grub(2) does not work. Does anybody know what magical trick there is to get the 2.6.32-5 booting? 2.) I thought t follow the Deban wiki.. I cannot get header-files for the installed 35.6 or 33.2 kernel in the repositories. I cannot build foreign headers because they will not match the running kernel. So how does one deal with that situtation? I'd prefer not to have to downgrade the kernel. Thanks for any answers!

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• Can't access my partitions after installing Ubuntu

  - by Manaf Al-Sarraf

  I installed Ubuntu 13.4 replace with win 8 after installation complete I can't access my partitions and receive a message like this : Error mounting /dev/sda5 at /media/manaf/01CD6C0800CEE670: Command-line `mount -t "ntfs" -o "uhelper=udisks2,nodev,nosuid,uid=1000,gid=1000,dmask=0077,fmask=0177" "/dev/sda5" "/media/manaf/01CD6C0800CEE670"' exited with non-zero exit status 14: The disk contains an unclean file system (0, 0). Metadata kept in Windows cache, refused to mount. Failed to mount '/dev/sda5': Operation not permitted The NTFS partition is in an unsafe state. Please resume and shutdown Windows fully (no hibernation or fast restarting), or mount the volume read-only with the 'ro' mount option." Thanks for helping :)

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• How to tell nginx to honor backend's cache?

  - by ChocoDeveloper

  I'm using php-fpm with nginx as http server (I don't know much about reverse proxies, I just installed it and didn't touch anything), without Apache nor Varnish. I need nginx to understand and honor the http headers I send. I tried with this config (taken from the docs) but didn't work: /etc/nginx/nginx.conf: fastcgi_cache_path /var/lib/nginx/cache levels=1:2 keys_zone=website:10m inactive=10m; fastcgi_cache_key "$scheme$request_method$host$request_uri"; /etc/nginx/sites-available/website: server { fastcgi_cache website; #fastcgi_cache_valid 200 302 1h; #fastcgi_cache_valid 301 1d; #fastcgi_cache_valid any 1m; #fastcgi_cache_min_uses 1; #fastcgi_cache_use_stale error timeout invalid_header http_503; add_header X-Cache $upstream_cache_status; } I always get "MISS" and the cache dir is empty. If I uncomment the other directives, I get hit, but I don't want those "dumb" settings, I need to control them within my backend. For example, if my backend says "public, s-maxage=10", the cache should be considered stale after 10 secs. Instead, nginx will store it for 1h, because of these directives. I was thinking whether I should try proxy_cache, not sure what's the difference. In both fastcgi and proxy modules docs it says this: The cache honors backend's Cache-Control, Expires, and etc. since version 0.7.48, Cache-Control: private and no-store only since 0.7.66, though. Vary handling is not implemented. nginx version: nginx/1.1.19 Any thoughts? pd: I also have the reverse proxy that is offered by Symfony2 (which I turn off to use nginx's). The headers are interpreted correctly by it, so I think I'm doing it right.

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• EC2 AMI won't boot after edit

  - by Eric Lars0n

  I did something stupid, I got a new laptop and copied everything over to the new one, then wiped the old one clean. Then I realized that I forgot to copy the private key out of .ssh that I use to connect to my AWS EBS backed instance. So I can't log in to my custom AMI. So I created a new Volume from the Snapshot of the AMI, then started up a public instance and attached the Volume to it, edit the sshd_config to allow for password log in. Unmounted the volume, detached it, made a snapshot of it, then made a new AMI from the snapshot. The new AMI launches, but never passes the Status Checks and is not reachable. What am I doing wrong? Or alternatively how can I fix my problem? Edit: Adding some of the console output Linux version 2.6.16-xenU ([email protected]) (gcc version 4.0.1 20050727 (Red Hat 4.0.1-5)) #1 SMP Mon May 28 03:41:49 SAST 2007 BIOS-provided physical RAM map: Xen: 0000000000000000 - 000000006a400000 (usable) 980MB HIGHMEM available. 727MB LOWMEM available. NX (Execute Disable) protection: active IRQ lockup detection disabled RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize NET: Registered protocol family 2 Registering block device major 8 XENBUS: Timeout connecting to devices! Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(8,0)

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• Is there a way to continue a partially finished MinGW build?

  - by vsz

  I am just trying to become familiar with MinGW (and with more complex command-line compiler tools) I have a really giant project to build, I successfully managed to generate the makefile with CMake, and started mingw. After more than an hour of hard work, and building dozens of libraries successfully, the build ended in an error. It seems I added an option in CMake which is not supported in my system. My problem is, I cannot figure out a way to just skip that library and continue with the build process. If I remove the option in CMake and start mingw again, it starts from the beginning and rebuilds everything, even those libraries which are already built.

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• How can I stop SipVicious ('friendly-scanner') from flooding my SIP server?

  - by a1kmm

  I run an SIP server which listens on UDP port 5060, and needs to accept authenticated requests from the public Internet. The problem is that occasionally it gets picked up by people scanning for SIP servers to exploit, who then sit there all day trying to brute force the server. I use credentials that are long enough that this attack will never feasibly work, but it is annoying because it uses up a lot of bandwidth. I have tried setting up fail2ban to read the Asterisk log and ban IPs that do this with iptables, which stops Asterisk from seeing the incoming SIP REGISTER attempts after 10 failed attempts (which happens in well under a second at the rate of attacks I'm seeing). However, SipVicious derived scripts do not immediately stop sending after getting an ICMP Destination Host Unreachable - they keep hammering the connection with packets. The time until they stop is configurable, but unfortunately it seems that the attackers doing these types of brute force attacks generally set the timeout to be very high (attacks continue at a high rate for hours after fail2ban has stopped them from getting any SIP response back once they have seen initial confirmation of an SIP server). Is there a way to make it stop sending packets at my connection?

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• How would I know if my OS is compromised?

  - by itsols

  I had opened a php folder from a friend's web host. I run it on mine to fix some bugs. Then I tried attaching the code to be emailed and GMAIL stated that the attachment was infected by a virus. Now I'm afraid if my Apache or OS (12.04) is infected. I checked the php files and found a base64 encoded set of code being 'eval'd at the top of each and every php file. Just reversing it (echo with htmlspecialchars) showed some clue that there were sockets in use and something to do with permissions. And also there were two websites referred having .ru extensions. Now I'm afraid if my Ubuntu system is affected or compromised. Any advice please! Here's my second run of rkhunter with the options: sudo rkhunter --check --rwo Warning: The command '/usr/bin/unhide.rb' has been replaced by a script: /usr/bin/unhide.rb: Ruby script, ASCII text Warning: Hidden directory found: /dev/.udev Warning: Hidden file found: /dev/.initramfs: symbolic link to `/run/initramfs'

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• How to Enable SideLoading in a SharePoint Site

  - by Damon Armstrong

  I was trying to deploy a SharePoint App for the first time and ran into an error about SideLoading not being enabled on the site. The solution is fairly simple – you just have enable the Developer feature on the site.  Unfortunately, it’s a hidden feature so you have to do it through PowerShell.  While searching the internet for the command to enable the feature I kept running into really long scripts that seemed overly complicated.  Fortunately, Jeff (a friend at work) sent me this snippet that is very concise and does the job: Enable-SPFeature e374875e-06b6-11e0-b0fa-57f5dfd72085 –url http://yoursharepointbox/site/ Obviously, you will need to update the URL to match your environment!

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• What Design Pattern is seperating transform converters

  - by RevMoon

  For converting a Java object model into XML I am using the following design: For different types of objects (e.g. primitive types, collections, null, etc.) I define each its own converter, which acts appropriate with respect to the given type. This way it can easily extended without adding code to a huge if-else-then construct. The converters are chosen by a method which tests whether the object is convertable at all and by using a priority ordering. The priority ordering is important so let's say a List is not converted by the POJO converter, even though it is convertable as such it would be more appropriate to use the collection converter. What design pattern is that? I can only think of a similarity to the command pattern.

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• Custom trackpad mapping doesn't work for all applications

  - by picheto

  I found out I could invert my trackpad scrolling, so as to work more like the OS X "natural scrolling", which I liked better. To do that, I run the following command on startup: xinput set-button-map 11 1 2 3 5 4 7 6 Where 11 is the touchpad id (found with xinput list and xinput test 11). This inverts the vertical and horizontal two-finger scrolling, and works fine in Terminal, Chrome, Document Viewer, etc. However, it doesn't work in Nautilus and some applications such as the Update Manager, as they keep the usual mapping. I'm running Ubuntu 12.04 x64 Why does this mapping work for some applications but not for others? I know there is software I can download to do the same, but this method seemed "cleaner". Thanks

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• Booting from USB only

  - by vivek

  I am a newbie on linux and dont understand many things unless given a line by line instructions. I am trying but linux does take some getting used to. I have installed ubuntu from live usb stick. Now I cannot boot my system without the usb being plugged in. There are answers whereby certain commands need to be run. For any command that I run with sudo (prefix) the terminal asks me for a password which I dont know. What do I do? How do I fix it such that the booting happens without usb being plugged in. So far I have just been booting from USB. Please help a recent converted from Windows. Thanks all

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