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+  Apptainer is an open source container platform designed to be 
+simple, fast, and secure. Many container platforms are available, 
+but Apptainer is designed for ease-of-use on shared systems and in 
+high performance computing (HPC) environments. It features:
+
+  An immutable single-file container image format, supporting 
+cryptographic signatures and encryption.
+  Integration over isolation by default. Easily make use of GPUs, 
+high speed networks, parallel filesystems on a cluster or server.
+  Mobility of compute. The single file SIF container format is easy 
+to transport and share.
+  A simple, effective security model. You are the same user inside a 
+container as outside, and cannot gain additional privilege on the 
+host system by default.
+
+  Apptainer is open source software, distributed under the BSD 
+License.
+
+  Apptainer was formerly known as Singularity and is now a part of 
+the Linux Foundation. When migrating from Singularity see the admin
+migration documentation and user compatibility documentation.
+
+
+  You shall install fakeroot for all functionalities.
+
+  Usage example:
+apptainer build slackware.sif \
+  /usr/share/apptainer/examples/slackware/slackware.def