export LD_LIBRARY_PATH=CCA_TOOLS_ROOT/lib \
Note that LD_LIBRARY_PATH values are colon-separated lists, without white space. We show the variable definition folded onto multiple lines for presentation purposes, but in practice you would usually want to make it a single long line. It is very easy to inadvertently introduce extraneous white space, causing errors.
These commands could be added to your own login files ($HOME/.cshrc or $HOME/.profile), put in a file somewhere else and sourced in your login files (this is the approach we use in the organized tutorials), or, if appropriate, added to the system login setup by your system administrator.