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source ~/lsst/loadLSST.csh eups distrib install lsst_apps -t WEEKLYw_2018_TAG13 curl -sSL https://raw.githubusercontent.com/lsst/shebangtron/master/shebangtron | python eups distrib install lsst_sims -t sims |
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You install the software in two steps (lsst_apps first and then lsst_sims) so that EUPS can install the binary version of lsst_apps. If you cut straight to `eups distrib install lsst_sims -t sims`, everything will be installed from source and the amount of time spent installing will increase significantly. WEEKLY_TAG is a tag indicating the weekly version of lsst_apps against which lsst_sims is currently built. The current value of WEEKLY_TAG is w_2018_13.
The `shebangtron` command is there to correct the paths to installed binaries of Data Management software packages. Every time you install new binary packages, you will need to run the `shebangtron` command.
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