Launching redis-server with the Latest Version - redis

I've downloaded Redis 3.2.5 which has the functionality for PFADD and I intend on using it.
Initially, I used to simply type redis-server in my root directory and it used to launch in the version 2.6.9.
After a little searching, I found out that going to cd redis.3.2.5/ and then running the same command it would work, and it did start at 3.2.5 that time, but now again when I ty it it's back at 2.6.9.
Any ideas?

The old binaries exist in your $PATH, while your new ones don't.
You need to replace your old Redis binaries with the new ones.
You can find the location of the old redis-server binary by typing which redis-server.

Related

Fixing gnuradio deleted directory

I have been following this guide to install gnuradio 3.8 onto my Ubuntu 22.04.1 LTS, but I missed the instruction where it said "Ensure the "gitbranch" is maint-3.8", and mine said maint-3.10. After trying to install gr-iqbal, it gave me an error. For whatever reason, I thought that simply deleting the directory it was built in would let me reinstall it. It didn't.
I have tried using pybombs install gnuradio which gives me CMake Error: The source directory "/home/aboigoe/sdr/src/gnuradio" does not appear to contain CMakeLists.txt.
I have tried using pybombs rebuild gnuradio, but that obtains Package gnuradio is not installed into current prefix. Aborting.
To fix that, I tried using pybombs fetch gnuradio, which runs fine, but doesn't fix the previous error.
Finally, I tried pybombs remove gnuradio, but it says Package gnuradio is not installed. Aborting.
So you're working with pybombs! That makes this particular task easier: just delete the whole prefix, and start anew. The main thing you needed to build in that prefix was GNU Radio, and you built 3.10, and wanted 3.8, so that's a complete rebuild, anyways.
I assume you're following that guide (which comes, kind of, out of nowhere – GNU Radio has installation guides on their wiki, https://wiki.gnuradio.org) because you want exactly GNU Radio 3.8, with gr-osmosdr and gr-iqbal.
If you just want a working GNU Radio that can talk to your SDR hardware, um, don't follow random guides from the internet :) Instead, your whole problem boils down to a simple
sudo apt install gnuradio
and that's it – GNU Radio 3.10, as Ubuntu 22.04 ships it, contains gr-soapy, and Ubuntu's apt will install many available hardware drivers (for RTL-SDR, hackrf, mirisdr, bladerf, audio-interfaced hardware, red pitaya,…) without any need to do anything yourself. It just works.
The thing that will be different is that the blocks to inteface with your hardware will not reside under the "osmosd" category in your GRC, but in "Soapy", but I guess you'll deal with that rather than going through the rather convoluted way of installing an old (and not updated anymore) version of GNU Radio, to include an old (and not updated anymore) version of gr-osmosdr :)

WSL2 stopped working with error The system cannot find the path specified

WSL2 stopped working suddenly. If I do a new installation of linux distros. Then it throws the following error, when I click launch button for the linux distro from play store:
Installing, this may take a few minutes...
WslRegisterDistribution failed with error: 0x80070003
Error: 0x80070003 The system cannot find the path specified.
the wsl --help command works properly. All other wsl command hangs or throws error as shown below
like wsl -l command throws this error
The system cannot find the path specified.
I had the same thing happening to me after I moved the directory of my distro.
You have to unregister the distro from WSL;
wslconfig /u Ubuntu-20.04
and then just execute the installed exe and install the whole distro to WSL again.
I had to reinstall the windows to fix the issue. Something got corrupted in the OS. However, before reinstalling the OS as I had lot of work stored in the WSL2, I took the backup of the entire WSL2 image, the big .vhdx file. This file is the Virtual Hard Disk of WSL2 Linux. The files inside cannot be directly explored from Windows at the moment.
If one has not moved the file anywhere else, it is stored here: %LOCALAPPDATA%\Packages\<PackageFamilyName>\LocalState\ext4.vhdx
Before reinstalling the OS, after taking the backup, I wanted to test if this backup runs fine on new install of WSL2. For that, I tested it on another machine, by installing the same Ubuntu WSL2 distro and replacing the .vhdx file created with the backup file. It ran fine.
So, it felt safe to do entire OS reinstall and then reinstalling WSL2 Ubuntu and finally replacing the .vhdx file with the old backup .vhdx file. So, I did loose some time. But, my data and all the applications/programs on WSL2 were intact.
I know this is old but I had the same problem after deleting a driver associated with Hyper V and fixed it by uninstalling the virtual machine platform and Windows Hypervisor along with WSL, rebooted, reinstalled all 3 and then I could install Ubuntu again
This is my first answer on stack overflow and English is not my first language.
So, I will answer this question in images. My solution would not delete the date in any existing installed Linux distribution, at least for me.
Hope you can solve this problem successfully.
enter image description here
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"Enable" Virtualization from your bios settings.
Settings may differ from bios to bios (search for your machine options)

Run linux distro of choice inside existing distro

Just wondering if it's possible and what the best route might be to run a full-on Linux distro within my existing distro? It would be great to for instance run Arch Linux within a chroot, jail, etc.. I believe people are doing this on Chromium for example.
I would require that whatever fs loaded, I can install packages using pacman and that my changes are kept intact.
I have tried the Virtualbox route by the way and there is a pretty nasty bug involving double mouse pointers on rotated host screens that I can't seem to get around.
I should mention that I'll be using this chroot environment for development, maybe running the odd X client to be exported remotely, etc..
I followed the chroot guide at https://wiki.archlinux.org/index.php/Change_Root and basically installed a whole Arch system within a nested chroot according to the Arch Linux installation guide and I'm now able to switch to the environment at will.
There is a tool https://github.com/fsquillace/junest that does everything automatically for you (downloads and unpacks ArchLinux distro inside some folder and chroots there).

How to install recent mono and monodevelop?

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

Install mod_mono on Mac OSX

I just started to develop website with mono+asp.net mvc2 on mac osx but I am quite new to mono and mac.
I have got things working from MonoDevelop. My website is running ok with XSP when I run it from MonoDevelop.
Now, I am trying to test it from Apache server, but I don’t know how to set things up. Some instruction I can found are all very old or incomplete. I tried a few of them, but none worked.
Could anyone please help me out?
The best way to install mod_mono on OS X is from source. To do this there are a couple steps.
First, make sure you've installed XCode (which can be found on the DVD or the 2nd CD that came with the machine or the App Store) which will provide you with gcc and the rest of the standard toolchain.
Most of the normal in-between steps can be skipped, assuming you've already installed Mono and MonoDevelop from their stable release packages. If you encounter an error later on, you'll want to install updated versions of XSP and Mono and try again.
Next, download the latest stable release of mod_mono, extract the contents of the archive (by double clicking on the icon) and follow steps 1, 2 & 3 in the INSTALL file, and you should be good to go. This entire process took about ~5 minutes to get up and running :)
I am a novice with mono but followed some instructions. I downloaded and installed everything from here:
http://www.go-mono.com/mono-downloads/download.html
To get Apache to work with mod_mono.so I downloaded source from this page:
http://download.mono-project.com/sources/mod_mono/
You have to compile it. I went into the unpacked directory and wrote this in termminal:
./configure --prefix=/usr
make
sudo make install
This puts the mod_mono.so in correct Apache dir and the mod_mono.conf file. To include it you must add this to your httpd.conf (I put it at the end of the file):
# mod_mono_configuration
Include /etc/apache2/mod_mono.conf
MonoServerPath /Library/Frameworks/Mono.framework/Versions/Current/bin/mod-mono-server2