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• Tool to make screenshot-based "screencast"

  - by liori

  Hello, I'd like to make a simple animation: some screenshots with added text. Something like screencast, but simpler, no audio... and hopefully very quick to produce--this is my main requirement. Googling for "screencasts" gives me full-blown tools to record video and audio, and I don't need them. I can make screenshots manually, then add text in GIMP... but maybe there is something easier, quicker? Very preferably something that works on Linux.

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• Enabling Compiz Viewport Switcher key bindings

  - by David Moles

  I'm running compiz 0.8.2 with compizconfig on Scientific Linux 6.2 with Gnome 2.28.2. In the compizconfig "General Options" I have "Desktop Size" set as follows: Horizontal Virtual Size: 6 Vertical Virtual Size: 1 Number of Desktops: 1 This gets me the layout I want, i.e. 6 workspaces in a horizontal layout. Ctrl-alt-cursor-keys work fine for switching between them. However, I can't figure out how to get key bindings for specific workspaces. I've tried enabling "Viewport Switcher" in compizconfig, and tried various combinations both in "Number-based viewport switching" and "Go to specific viewport", to no apparent effect. My first thought was that something else was eating the specific key bindings I chose, but I think I've tried every combination of shift, control, alt and super (i.e., the Windows key) by now. I tried setting 6 desktops under "General Options" instead of one desktop with horizontal virtual size 6, but that doesn't seem to make a difference either. What am I missing?

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• PostgreSQL disaster recovery options

  - by Alex

  My customer has quite a large (the total "data" folder size is 200G) PostgreSQL database and we are working on a disaster recovery plan. We have identified three different types of disasters so far: hardware outage, too much load and unintentional data loss due to erroneously executed bad migration (like DELETE or ALTER TABLE DROP COLUMN). First two types seem to be easy to mitigate but we can't elaborate a good mitigation plan for the third type. I proposed to use ZFS and frequent (hourly) snapshots but "ZFS" means "OpenIndiana" these days and our Ops engineers do not have much expertise in it, so using OpenIndiana imposes another risk. Colleagues try to convince me that restoring from PostgreSQL PITR backup can be as fast as restoring from a ZFS snapshot but I highly doubt that replaying, say, 50G of archived WALs can be considered "fast". What other options are we missing? Is ZFS an only viable alternative? Can we get a fast Pg DB restore time in the Linux environment?

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• How does pptpd (poptop) or pppd work with eap-tls and mppe-128?

  - by Henk

  To create a VPN I've installed pptpd on an Ubuntu domU (Debian domUs can also be created). MSCHAPv2 isn't a very strong authentication protocol so I'd like to use EAP-TLS. I've set up a FreeRADIUS server and certificates for EAP-TLS before (for use with WPA), and I've also set up a pptp server with mschap-v2 auth, but I can't figure out how to combine the two. Maybe pppd can use EAP-TLS on its own, but I can't find support for it in the Ubuntu package. If I need to patch the package, that's fine, I know how to patch Debian packages (provided the patch applies cleanly). Also, can MPPE still be used when pppd is configured to use EAP? Because it says in the manual several times that MPPE requires MSCHAP. However, other docs like this one: http://www.nikhef.nl/~janjust/ppp/ seem to refute that. The clients are running Mac OS X Leopard and GNU/Linux, there's no need to fix anything for Windows.

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• In CentOS 4.3 Webmin 1.3000 bandwidth monitoring is eating disk space. How to delete those files?

  - by Silkograph

  I maintain Linux server being used for Mail, Squid and DNS service. Recently I observed that something was eating server disk space. But at last, today I caught the culprit which was consuming the disk by storing large number of files. On this server, Webmin 1.300 is installed. We use Squid proxy and Sarg to monitor Internet access. I always manually clear Sarg generated files under /var/www/html/squid for last few years. But I never realized that Webmin is also storing some kind of bandwidth log files in its' directory structure. I have noticed that under /etc/webmin/bandwidth/hours it has stored more thousands of files since year 2007 totaling about 17 GB. We have used 40 GB HDD for this server machine. My question is how can I delete those (/etc/webmin/bandwidth/hours) files safely?

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• Visual annotator for large images

  - by pts

  I have a few hundred images of 30000 x 10000 pixels in size. Each image has lots of text (rendered as pixels) on it. I'd like to translate all text to another language. I speak both languages, and it's fine for me to translate each phrase manually. I need an image editor which can open these images quickly (faster than Inkscape, which needs about 60 seconds to open such an image), lets me zoom and rotate by 90 degrees, lets me erase (i.e. change the color of a selected rectangle to solid white), lets me add text, and lets me save the file as quickly as possible. I'd like to minimize the time I have to wait for the software to load, render and save images. Which is the best program for that on Windows? On Linux?

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• What does dd conv=sync,noerror do?

  - by dding

  So what is the case when adding conv=sync,noerror makes a difference when backing up an entire hard disk onto an image file? Is conv=sync,noerror a requirement when doing forensic stuff? If so, why is it the case with reference to linux fedora? Edit: OK, so if I do dd without conv=sync,noerror, and dd encounters read error when reading the block (let's size 100M), does dd just skip 100M block and reads the next block without writing something (dd conv=sync,noerror writes zeros to 100M of output - so what about this case?)? And if is hash of original hard disk and output file different if done without conv=sync,noerror? Or is this only when read error occurred?

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• How do I setup Apache with FastCGI and Ruby?

  - by sdellysse

  I've been reading alot of forum posts, tutorials, etc., about setting up apache under linux with fastcgi. I'm trying to run fcgi for some of my ruby development (not rails), but I figure it should apply to any language. Please note that I already have apache, fastcgi, ruby-fcgi, and the like already installed on my web box. Conceptually, I'm having a hard time with it. Does apache spawn the specified fcgi processes as needed? Do I start them along side apache? Basically, I'm trying to get to a point where I am able to ask the proper questions, so apologies if the title is misleading.

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• How to make Windows 7 Network show Samba share after VM is rebooted/restored?

  - by lackey

  On Windows 7, I have VirtualBox running Linux (Ubuntu 8.04), with Samba set up so that the Windows host can access it. But if the virtual machine is shut down & restored, or rebooted, the Windows Network no longer shows it. I've tried refreshing many times, restarting Samba, disabling/enabling the virtual network adapter, and running the succession of commands ipconfig /release, ipconfig /flushdns, & ipconfig /renew, but none worked. As a last resort I could restart the host itself, but is there a better way?

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• Squid proxy server not forwarding traffic

  - by DilbertDave

  I'm trying to set up a web filtering system (dans guardian) on my home network but am failing at the first hurdle - configuring the Squid Proxy server. No matter what I do I cannot seem to configure it properly and I just receive the 'Requested URL could not be received' error page. If I remove the proxy setting on the browser everything works normally. Ultimately I want to run this on something like a Raspberry Pi but at the moment I'm testing with a virtual machine (although efforts with a netbook were equally unsuccessful). The VM has a clean installation of Linux Mint 15 and I've installed squid via apt-get. I've followed numerous walkthroughs but this on (https://help.ubuntu.com/lts/serverguide/squid.html) pretty much sums up the process I've been taking. I'm obviously missing something but cannot figure it out - any assistance appreciated.

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• How can I use my laptop's monitor as my PC's ONLY monitor? (please vote to reopen) [closed]

  - by Randell

  Please vote to reopen. This is different from Can I use my laptop as a second monitor for my desk computer?, because that question is asking how to use the laptop screen as the secondary display, not as the only display. My PC's monitor just died and I'm not looking at buying a new monitor anytime soon. So I'm thinking of using my laptop's monitor for it. Both machines are running on Fedora linux. Edit: Both machines are connected to the same wireless network. PC needs to log in before it can connect to the network if I'm not mistaken.

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• Which is better for multi-use auth, MySQL, PostgreSQL, or LDAP?

  - by Fearless

  I want to set up an Oracle Linux 6 server that gives users secure IMAP email (with dovecot), Jabber IM, FTP (with vsftpd), and calDav. However, I want each user logon to be able to authenticate all services (e.g. Joe Smith signs up once for a username and password that he can use for email, ftp, and his calendar). My question is, which database service will be best suited for that application? Also, is there a way to link the database with the preexisting server shell logins (e.g. so I can read the root account's LogCheck emails on a different device)?

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• Force a browser to load the 'https' edition of a website, not the 'http'?

  - by warren

  This is similar to this previous question, but I believe it's a bit different*. Sites like GMail support a preference that pushes all traffic through the SSL edition of the site rather than the plain-text protocol. For sites that don't offer such preferences (or ones that may, but I have been unable to find, like facebook), is there a way using only the browser (perhaps with a plugin or addon) to always try SSL first, and fall-back to plain-text iff SSL fails? Is that solution available on Windows, Mac OS X, and Linux? Just one? * The previous question was looking for external applications that would accomplish this goal.

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• How to display SSH banner at login, but only for password authentication

  - by banjer

  I have a warning message that is displayed to a user after they enter their username to log in to our Linux servers. I only want to display this message for password authentications, and not when keys are used. It should only show to a user who is logging into a host, and not when they are sshing from one host to another (our hosts all have keys set up so we can ssh from one to another without entering passwords). Currently, I have a line for Banner in the /etc/ssh/sshd_config file which points to a text file containing the warning message. Banner doesn't appear to have any further config options, so I'm wondering if there is a way to do this with pam or some other mechanism? Thanks.

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• How do I configure networking on CentOS 6 running on hyper-v?

  - by LonelyLonelyNetworkN00b

  I'm not using legacy adapters, and i've installed Linux Integration Components 3.2. THe problem i'm facing is that the command 'setup' or 'system-config-network' doesn't list any network interfaces. If i run ifconfig -a i can see both the network cards i've attached. By setting a ip using ifconfig i can get network connectivity. The problem is that it's not persistent after a reboot. I'm a 100% centos newbie, but I figure it has something to do with that the centos installer couldn't see the NICs on install. How can I fix this?

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• /proc/pid/environ missing variables

  - by Josh Arenberg

  google is giving no love on this one today, so I turn to the experts... I'm currently hacking together a script that relies on the /proc/pid/environ feature in Linux (RHEL 4) to check for a particular environment variable. Trouble is, it seems certain environment variables aren't showing up in there for some reason. Example: create some test vars: $ export T_1=testval TEST_1=testval T=testval TESTING_LONGEST=testval open a subshell: $bash $ cat /proc/self/environ|tr "\0" "\n"|grep testval TESTVARIABLE_LONGEST=testval T=testval hmm... where did T_1 and TEST_1 go?? what rules govern this strange universe? Thanks in advance, Josh

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• Updating autoreconf

  - by AzaraT

  So I need to use the autoreconf to configure a package. However I need at least version 2.61. I'm on CentOS 5.8 and it seems like there's no package for it so I went on to compile it myself. So I get the source of autoconf from http://www.gnu.org/software/autoconf/ and compiled that. And sure when I do autoconf -V it shows up as version 2.68 which is indeed the latest version. However autoreconf (nothing the re) still shows up as the old version 2.59 which causes me some problems. So could someone help a relatively new linux user, updating autoreconf properly? Thanks

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• Setup a automatic server reboot on when a particular service fails

  - by user1179459

  I am running linux based server (centos 6.0) with cpanle and WHM, I have critical website running with a chat server which uses a openfire as the chat server backend server, i have monitored last few weeks this service crashes quite often, i have no way of knowing that, and i have to wait till the next day to restart the server. (and this can only be fixed by using server reboot as its got to do with some java memory problem) is there a way i can setup a monitoring service to the server and if this service goes down server itself will reboot ? is this something possible or is there a better way to overcome this problem ?

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• Password Self-serve Active Directory via LAMP environment

  - by keithosu

  I would like to be able to change active directory passwords via a Linux/Apache based webpage. This would be a self serve web page for the user. I have SSL-LDAP setup on the Active Directory to make this happen. Is there any project or code out there that will do this? I've looked at this phpadadmin and I cannot get it to work. I think this is for IIS/php/mySQL Another thing to note is I would like the user to authenticate to change their own password. The product/service should not need a privileged account to run. Thanks Keith

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• Alternatives to Citrix GoToAssist ?

  - by Evan Carroll

  Citrix GoToAssist is a really nifty little web application for customer support that allows you to take control of someones OSX, or Windows machine. Essentially, it works likes this: You log in to your management console You get a code You give them a code, and a website (fastsupport.com) They go there and enter in the code They accept the browser applet which installs a program on their computer You have control of their desktop You can see their desktop, configure applications, etc. They can also see when you disconnect. It is really rather nifty, but it doesn't support Linux and it is rather expensive (660$ a year). Does anyone know of any alternatives to this? I'm looking for a solution as simple on the user as this one, that doesn't require firewall configuration or setting up ssh/vnc/rdesktop etc.

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• If using a bootable Ubuntu USB drive, can I use the internal hard drive as a temporary download and

  - by NoCatharsis

  I am new to Linux, so this is probably a basic problem... My flash drive is only 4GB in size and that is not enough to hold kernel and other package updates, even if only temporary. I am actually using Kubuntu, but I don't think this would change the nature of the question...? I would just like to be able to set my download directory to the internal drive to download the upgrades, then replace the old versions installed on the USB. Of course I have no use for keeping the older versions, so would I also have to manually remove those after upgrading?

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• SMS Gateway Suggestions Needed

  - by SidC

  Hi All, Our website is written using PHP and is powered by a hosted Linux web server. We want to allow our users to receive SMS messages when they've received intranet-site messages from fellow users - SMS Notification. What is required to implement this functionality? Are there open source (free?) server applications that address this? Do we need to contract with wireless carriers to send messages to their networks? What, if any fees, must be paid to them? Thanks, Sid

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• LVM, Soft RAID1, and Replication?

  - by mtkoan

  Hi all, I am practicing putting together a HA file server. It is a linux server with 2 1.5TB Hard drives. My plan is to use LVM to manage the physical volumes into logical volumes for /, /home, and /var. Then use md (soft RAID 1) to mirror the image onto the second HDD, THEN use DRDB to mirror the entire setup another server. Is this overkill? Would I just be okay with just md and DRDB? The system will serve user's homedirs (~100) and probably some groupware or other local intranet. On my own machines I've always separated root and /home partitions in case I break something, I can easily reinstall the OS. Should I follow that same theory here? If so I need LVM, because I really can't predict where we'll need more space, /var or /home.

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• how to remotely open an URL in Firefox in a specific profile?

  - by miernik

  I have several instances of Firefox with several different profiles running. Among them profiles with the names "software" and "test". I am trying to open an URL from a bash script to have it open in profile "test", like this: firefox -P "test" http://www.example.org/ However that opens it in profile "software" anyway. Any ideas? Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.8) Gecko/20100308 Iceweasel/3.5.8 (like Firefox/3.5.8)

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• SSO solution and centralized user mgmt for about 10-30 Ubuntu machines?

  - by nbr

  Hello, I'm looking for a clean way to centralize user management. The setup: About 10-30 linux machines (Ubuntu 10.04 LTS server) Maybe 10-30 users for now. The requirements (hopes and expectations): A single place for the administrator to manage user accounts, passwords and the list of machines each user has access to. (And probably groups.) Doesn't have to be fancy. Single sign-on for SSH: the user should be able to login from machine A to machine B without re-entering his/her password. A Quick Google searches give me pointers to OpenLDAP and Kerberos, but I'm not sure where to start and what problem will each solution actually solve. Which way to go? I'd love to find a clear that focuses on this subject. (Or: am I asking "a wrong question"?)

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