[[PageOutline]]
= glibc version problems =
Compute nodes in partitions '''defq''' and '''interactive''' (as well as login nodes) have Centos version 6.5 with glibc version 2.12.

When you try to run a pre-build software that is built on a newer operating system, you will encounter the error, for example,

{{{
$ prefetch
./prefetch: /lib64/libc.so.6: version `GLIBC_2.14' not found (required by ./prefetch)
}}}

Since glibc version on Centos version 6.5 nodes is 2.12, GLIBC_2.14 isn't available. It is possible to run this software if you use the compute nodes in partition '''centos7''', which have Centos version 7.4 with glibc version 2.17. See [https://wiki.hpc.tulane.edu/trac/wiki/cypress/using#SelectingCentOSglibcVersionViaSLURMpartition here] for more details.

See the alternate solution below if your software requires a glibc version greater than 2.17.

== Work with Singularity Images ==
[https://sylabs.io/ Singularity] allows you to run an application built for a different distribution of Linux than Cypress OS (Centos 6 or 7). Here we run Rockylinux 9.2 on Cypress using Singularity.

=== Run Singularity Images Interactively ===