My goal is to build up a recommendation system and after going through many articles, I came across Mahout as a simple, yet effective way to go on. I already have XAMPP installed on my system.
How can I install Mahout? I need the complete instructions since I have neither worked with cygwin before, nor have I worked with Hadoop, and everywhere I see, I see these two mentioned very frequently. I first need to install it on my localhost before going on installing it on the server.
Here is a detailed instructions page to install Apache Mahout with Hadoop in windows. Its bit tedious, but can be done anyway.
http://alans.se/blog/2010/mahout-on-hadoop-in-cygwin/
Related
I am getting this issue when running
httpd -t
httpd: Syntax error on line 545 of /private/etc/apache2/httpd.conf: Syntax error on line 1 of /private/etc/apache2/other/passenger.conf: Cannot load /Users/sbaidon/.rvm/gems/ruby-2.2.5/gems/passenger-5.3.5/b
uildout/apache2/mod_passenger.so into server: dlopen(/Users/sbaidon/.rvm/gems/ruby-2.2.5/gems/passenger-5.3.5/buildout/apache2/mod_passenger.so, 10): no suitable image found. Did find:\n\t/Users/sbaidon/.rv
m/gems/ruby-2.2.5/gems/passenger-5.3.5/buildout/apache2/mod_passenger.so: code signature in (/Users/sbaidon/.rvm/gems/ruby-2.2.5/gems/passenger-5.3.5/buildout/apache2/mod_passenger.so) not valid for use in p
rocess using Library Validation: mapped file has no cdhash, completely unsigned? Code has to be at least ad-hoc signed.\n\t/Users/sbaidon/.rvm/gems/ruby-2.2.5/gems/passenger-5.3.5/buildout/apache2/mod_passen
ger.so: stat() failed with errno=22
Passenger installation is just fine.
I ran into this too: the issue is that the built-in httpd that comes with macOS Mojave has Library Validation turned on, which means any modules it loads must be properly signed. Unfortunately, mod_passenger.so is not signed, so loading fails. Actually, a lot of people are having this problem with loading Apache modules on macOS Mojave (especially during the beta), some example references:
https://github.com/GrahamDumpleton/mod_wsgi/issues/357
https://github.com/phpredis/phpredis/issues/1406
I believe it's possible to set up a plist somewhere to give an entitlement to httpd to disable library validation (com.apple.security.cs.disable-library-validation) as described at https://developer.apple.com/documentation/security/com_apple_security_cs_disable-library-validation. For instance, here's a recent WebKit patch where they add it to allow plugin loading: https://bugs.webkit.org/show_bug.cgi?id=183252. Similarly, here's the Mozilla people talking about how they need to enable this (and other) properties: https://bugzilla.mozilla.org/show_bug.cgi?format=default&id=1470597.
Unfortunately, I don't do macOS development (I just do development on macOS) and I have absolutely no idea how to apply it to the built-in Apache, I'm sorry.
At this point I'm kind of sick of every major macOS update nerfing all my httpd settings and generally being a pain (it's infrequent but it's still annoying), so I'm doing what I should have done years ago: stop using the built-in httpd that comes with OS/X and just use Homebrew httpd.
Here's some instructions I found regarding setting up Homebrew httpd (and disabling the built-in macOS httpd), it's pretty straightforward and you don't have to follow all of the directions about multiple PHP versions etc: https://getgrav.org/blog/macos-mojave-apache-multiple-php-versions
If someone can figure out how to disable Library Validation in the built-in httpd, or if there is some way to provide signing on mod_passenger.so (seems unlikely since both the Homebrew and gem passenger need to be buildable from source), you don't need to junk the built-in httpd. But I personally think the best solution is to move away from it entirely and use the Homebrew version instead.
For anyone having this issue or any issue with library validation in macOS Mojave, I found an incredibly easy fix to disable it. https://github.com/mologie/macos-disable-library-validation
This is fixed in macOS 10.14.4
A penetration test has recently identified that one of our RHEL(6.7) servers running Apache 2.2.15 is vulnerable on a number of points and needs to be updated to the latest version 2.4. I have run yum update and it says that there are no packages marked for update. I understand that I will need to download the updates manually. There are a few questions I have around the requirement to upgrade Apache.
I am up to date on the 2.2 version tree. Does this mean that any security patches made to version 2.4 will be back patched to version 2.2.X as well?
I am running PHP (version 5.3.3) and MySQL (version 5.1.73) - will these be affected by upgrading the Apache version (Google tells me that there is no problem on both fronts - but I thought I'd ask before I started down this route).
If you experts tell me that I have no other choice but to upgrade, then I'm planning on using the instruction set here: https://unix.stackexchange.com/questions/138899/centos-install-using-yum-apache-2-4
Thank you in advance for your advice.
You could download the 2.4 source code from the Apache site and compile it. There's a setting which will configure for RedHat:
--enable-layout=RedHat
This setting will configure the paths for executables, configuration files, libraries etc in one go.
The following should be a reasonable starting point for a configuration line:
sh ./configure --enable-layout=RedHat --enable-mods-shared=all
then perform a make and make install
Do the same with a newer version of PHP (5.3.29 is available in the "old downloads" section, but try a newer version. Check the changes first though) and your problems should be lessened. Finally, MySQL or MariaDB is available for download and compilation too
Obviously, try all of this on a test machine first and back everything up. Your test machine should be as close as possible to your production machine. If you use something like VirtualBox to try it, you can take a snapshot at each point of the process and rollback if something goes wrong
I use Centos 6.5, I've installed apache 2.2 on my server by yum, I want to upgrade my apache to 2.4, but yum not support that, so I download apache 2.4.7 and install it to opt/apache/httpd-2.4.7 follow the tutorial here: Apache 2.4.x Manual install on RHEL 6.4 - No apache modules will load on start . I want to change environment variables to new apache version to write apache 2.4 modules (change include folder for header file, change "modules" folder when build with apxs,...). I think I must install another httpd-devel for apache 2.4.7, because I still not install httpd-devel-2.4.7, but I don't know how to install and use it instead of httpd-devel-2.2 by yum. I can not describe my problems clearly in English, so I hope you can understand it. I'm a newbie and I really need your help. Thank you!
CentOS is image of RHEL, which stands for Red Hat Enterprise Linux. RHEL is designed to be an "Enterprise class" operating system, in which you rely on software packages that are delivered from controlled repositories where they are made available only after being thoroughly tested for Enterprise level use.
From that point of view, its generally not a good idea to install packages from source code, or using third party RPMs, because once you do, your OS is no longer "Enterprise" class.
If you're trying to upgrade for security reasons, you shouldn't. Critical security updates are always backported in previous RPM releases, so you only have to update your current package from the same yum repo from where you got it first. The binary will still say it is Apache 2.2, but it will have the latest security updates.
If you need an actual feature of 2.4, the smart move is to upgrade your CentOS. It may seem like the harder option initially, but it never is in the long run.
In my experience these reports can be fairly basic/binary:
Are you running the latest version of the software? If no flag as security risk.
However this fails to take into account package managers which back port fixes to older versions and so often have addressed potential security issues.
By moving away from the packaged version you are making security updates more difficult (as can't do a simple "yum update" to address them anymore).
Apache 2.2 is still maintained for security and bug fixes - though how long for remains to be seen and it is falling further and further behind in features.
So often you just need to explain (and prove!) you have a regular patching process and so the "version of Apache" you are reporting is not really accurate in terms of security patching.
See here for more details: https://serverfault.com/questions/731657/pci-compliance-apache-versions/
Saying all that we moved to Apache 2.4 on centos a while back for some extra features we wanted and just upgrade it to the latest version as part of regular patching cycle and are not finding it too inconvenient. Yes it's not quite as simple as "yum update" but it's a decision we've made because of some features we required. Not a decision to be taken lightly as Garreth states but it had the added side effect of this not getting highlighted anymore in these sorts of security scans :-)
We made this decision despite upgrading to a newer version of Red Hat as that was still on an older version of Apache (2.4.7 if memory serves me correctly) which still missed a few features we required. Sometimes it's frustrating how far behind some of these "enterprise" versions are, but that's the downside when there are plenty of upsides to using them too (stability, security... etc.).
I tried to install mono and monodevelop on centOS 6.3.
After many hours I was able to install mono but failed with monodevelop.
I'm really astonished how difficult and time consuming it is, to get a recent mono/monodevelop version on linux installed.
Is there nobody willing to write and maintain an install/compile tutorial to get the most recent mono/monodevelop/monodata/ASP.NET MVC/... version on the major linux distributions (Centos, Ubuntu, Suse, Debian) installed?
I think many people developing on Windows (with limited linux knowledge) would like to start using mono, if the boarding hurdle would be somehow lower.
It may be the most important to make Mono more used and more visible.
Please, write a tested tutorial (script) for compiling mono/monodevelop.
Thank you!
I have created a project on Open Build Service, which produces builds of the latest MonoDevelop 4.0.10 for Debian, Ubuntu, CentOS, and Fedora.
see https://build.opensuse.org/project/show/home:tpokorra:mono
For installation instructions with apt-get or yum, see:
http://software.opensuse.org/download/package?project=home:tpokorra:mono&package=monodevelop-opt
I hope this will increase the usage of MonoDevelop on Linux Desktop environments.
Monodevelop 4.
If you use any *buntu. Check this.
"You can open up the terminal and install it via the following:
1. sudo add-apt-repository ppa:keks9n/monodevelop-latest
2. sudo apt-get update
3. sudo apt-get install monodevelop-latest"
http://mono-d.alexanderbothe.com/?p=101
Xamarin should be doing a better job at publishing the linux packages in a one-click manner. I don't care what linux distro (SuSE, RHEL, CentOS, Ubuntu etc) - just pick any one as the supported one and publish for it. It seemed that it used to be SuSE but even that has old packages as seen within Zypper/YaST.
Update Mono framework
Having said that, to update the Mono framework itself, without letting go of the package managers try this. This will work as long as the project dutifully publishes the RPMs. You don't want to build from source since it's a more fickle process and the setup distracts from your real objective (i.e. develop).
Obviously, please replace the URL below to what will be latest by the time you're reading this.
mkdir mono-rpms
cd mono-rpms
wget --reject "index.html*" -nd -r -e robots=off --no-parent http://download.mono-project.com/archive/3.2.3/linux/x64/
sudo zypper install *rpm
Update MonoDevelop (the IDE)
Timotheus Pokorra's answer indicates he's filling in some of the usability void left by Xamarin (Thanks Timotheus!!). You can install MonoDevelop via
http://software.opensuse.org/download/package?project=home:tpokorra:mono&package=monodevelop-opt
Note that on SuSE I get the error
Problem: nothing provides liberation-mono-fonts needed by mono-libgdiplus-opt-3.0.12-7.1.x86_64
Solution 1: do not install monodevelop-opt-4.0.12-5.2.x86_64
Solution 2: break mono-libgdiplus-opt-3.0.12-7.1.x86_64 by ignoring some of its dependencies
I (very reluctantly) selected to break the dependency. Note that I already had liberation-fonts (via sudo zypper install liberation-fonts). I don't know if its the same/different as liberation-mono-fonts. Anyway, hope Timotheus fixes it when he has a moment.
I'm not sure if you've already seen this, but this may help:
http://www.mono-project.com/Parallel_Mono_Environments
The most common problem that new developers have when coming to Linux from systems like Windows is not properly setting up their environment variables and so when they do the standard ./configure && make && make install routine, when it involves a number of source packages (like Mono does), any package that depends on the core package won't pick up the correct location for that base package.
Your question really doesn't explain what parts you found confusing or difficult so it's hard to address those issues.
For people unfamiliar with setting up Linux systems, it may be easier if you just go with a system like Ubuntu which has fairly recent pre-built packages (although not the latest - I don't think any Linux system keeps up with Mono releases) rather than wrestling with the learning curve of how to build everything yourself.
It is confirmed that in the near future Xamarin will support Linux and provide binaries (mono and mainline applications) for Debian and Centos derivatives, and their are already packages for Debian and Centos derivatives for technical preview. So cheers and no more pain of compiling and even parallel mono installaions.It can not get more easy than this. Check here
Has anyone gotten VisualWorks running under OpenBSD? It's not an officially supported platform, but one of the Cincom guys was telling me that it should be able to run under a linux compatibility mode. How did you set it up?
I already have Squeak running without a problem, so I'm not looking for an alternative. I specifically need to run VisualWorks's Web Velocity for a project.
Thanks,
if you're wondering about setting up linux compatibility mode and you're running the GENERIC kernel:
# sysctl kern.emul.linux=1
to enable at boot uncomment the kern.emul.linux=1 line in /etc/sysctl.conf
See the OpenBSD FAQ, specifically section 9.4 - Running Linux Binaries on OpenBSD.
Typically there are more steps needed then just kern.emul.linux=1 unless you have statically linked (i.e. completely stand-alone) binaries. The good news is that packages exist that contain Linux libs, and they are easy to install. This is all detailed in the above link.