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Title: Install on Linux | Singularity

Description: Install on Linux These docs are for Singularity Version 2.5.2. For older versions, see our archive Installation from SourceYou can try the following two options:Option 1: Download latest stable releaseYou can always download the latest tarball release from GitHubFor example, here is how to download version 2.5.2 and install:VERSION=2.5.2wget https://github.com/singularityware/singularity/releases/download/$VERSION/singularity-$VERSION.tar.gztar xvf singularity-$VERSION.tar.gzcd singularity-$VERSION./configure --prefix=/usr/localmakesudo make installNote that when you configure, squashfs-tools is not required, however it is required for full functionality. You will see this message after the configuration:mksquashfs from squash-tools is required for full functionalityIf you choose not to install squashfs-tools, you will hit an error when you try a pull from Docker Hub, for example.Option 2: Download the latest development codeTo download the most recent development code, you should use Git and do the following:git clone https://github.com/singularityware/singularity.gitcd singularity./autogen.sh./configure --prefix=/usr/localmakesudo make installnote: The ‘make install’ is required to be run as root to get a properly installed Singularity implementation. If you do not run it as root, you will only be able to launch Singularity as root due to permission limitations.Show Video Tutorial Prefix in special placesIf you build Singularity with a non-standard --prefix argument, please be sure to review the admin guide for details regarding the --localstatedir variable. This is especially important in environments utilizing shared filesystems.UpdatingTo update your Singularity version, you might want to first delete the executables for the old version:sudo rm -rf /usr/local/libexec/singularityAnd then install using one of the methods above.Debian/Ubuntu PackageSingularity is available on Debian (and Ubuntu) systems starting with Debian stretch and the Ubuntu 16.10 yakkety releases. The package is called singularity-container. For recent releases of singularity and backports for older Debian and Ubuntu releases, we recommend that you use the NeuroDebian repository.Testing first with DockerIf you want a quick preview of the NeuroDebian mirror, you can do this most easily with the NeuroDebian Docker image (and if you don’t, skip to the next section). Obviously you should have Docker installed before you do this.First we run the neurodebian Docker image:$ docker run -it --rm neurodebianThen we update the cache (very quietly), and look at the singularity-container policy provided:$ apt-get update -qqq$ apt-cache policy singularity-containersingularity-container: Installed: (none) Candidate: 2.3-1~nd80+1 Version table: 2.3-1~nd80+1 0 500 http://neuro.debian.net/debian/ jessie/main amd64 PackagesYou can continue working in Docker, or go back to your host and install Singularity.Adding the Mirror and InstallingYou should first enable the NeuroDebian repository following instructions on the NeuroDebian site. This means using the dropdown menus to find the correct mirror for your operating system and location. For example, after selecting Ubuntu 16.04 and selecting a mirror in CA, I am instructed to add these lists:sudo wget -O- http://neuro.debian.net/lists/xenial.us-ca.full | sudo tee /etc/apt/sources.list.d/neurodebian.sources.listsudo apt-key adv --recv-keys --keyserver hkp://pool.sks-keyservers.net:80 0xA5D32F012649A5A9and then updatesudo apt-get updatethen singularity can be installed as follows:sudo apt-get install -y singularity-containerDuring the above, if you have a previously installed configuration, you might be asked if you want to define a custom configuration/init, or just use the default provided by the package, eg:Configuration file '/etc/singularity/init' ==> File on system created by you or by a script. ==> File also in package provided by package maintainer. What would you like to do about it ? Your options are: Y or I : install the package maintainer's version N or O : keep your currently-installed version D : show the differences between the versions Z : start a shell to examine the situation The default action is to keep your current version.*** init (Y/I/N/O/D/Z) [default=N] ? YConfiguration file '/etc/singularity/singularity.conf' ==> File on system created by you or by a script. ==> File also in package provided by package maintainer. What would you like to do about it ? Your options are: Y or I : install the package maintainer's version N or O : keep your currently-installed version D : show the differences between the versions Z : start a shell to examine the situation The default action is to keep your current version.*** singularity.conf (Y/I/N/O/D/Z) [default=N] ? YAnd for a user, it’s probably well suited to use the defaults. For a cluster admin, we recommend that you read the admin docs to get a better understanding of the configuration file options available to you. Remember that you can always tweak the files at /etc/singularity/singularity.conf and /etc/singularity/init if you want to make changes.After this install, you should confirm that 2.3-dist is the version installed:$ singularity --version 2.4-distNote that if you don’t add the NeuroDebian lists, the version provided will be old (e.g., 2.2.1). If you need a backport build of the recent release of Singularity on those or older releases of Debian and Ubuntu, you can see all the various builds and other information here.Build an RPM from sourceLike the above, you can build an RPM of Singularity so it can be more easily managed, upgraded and removed. From the base Singularity source directory do the following:./autogen.sh./configuremake distrpmbuild -ta singularity-*.tar.gzsudo yum install ~/rpmbuild/RPMS/*/singularity-[0-9]*.rpmNote: if you want to have the RPM install the files to an alternative location, you should define the environment variable ‘PREFIX’ to suit your needs, and use the following command to build:PREFIX=/opt/singularityrpmbuild -ta --define=

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