Swap out Matlab/Runtime folder tree, tar won't ceate symlink
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I am on an Ubuntu VM (VirtualBox). I created the VM with limited disk space. I find myself switching between different versions of Matlab and their associated Runtimes. Because of the small virtual disk, I am uninstalling a version of Matlab or a version of its Runtime in order to install something else. The installation takes place over the internet, and unfortunately, I have modest bandwidth meant for home use.
Instead of uninstalling and re-installing, I tried to save time by temporarily swapping out a Runtime or a Matlab version and storing it in the much larger disk of the host Windows OS. If we assume that the host OS user's home folder is mounted as /media/sf_HostOSusr and the Runtime folder tree is rooted at /usr/local/MATLAB/MATLAB_Runtime/v912:
cd /usr/local/MATLAB/MATLAB_Runtime/
tar czf \
/media/sf_HostOSusr/VendorApp/matlab/20230425.1502%usr%local%MATLAB%MATLAB_Runtime%V912.tgz \
v912
I get several dozen errors:
tar: v912/bin/glnxa64/libmwfftw3f_mpi.so.3: Cannot create symlink to ‘libmwfftw3f_mpi.so.3.5.8’: Operation not permitted
tar: v912/bin/glnxa64/libPDFRes.so.7: Cannot create symlink to ‘libPDFRes.so.7.1’: Operation not permitted
tar: v912/bin/glnxa64/libmwfftw3f.so.3: Cannot create symlink to ‘libmwfftw3f.so.3.5.8’: Operation not permitted
<...snip...>
tar: v912/runtime/glnxa64/libmwmclmcrrt.so: Cannot create symlink to ‘libmwmclmcrrt.so.9.12’: Operation not permitted
tar: v912/sys/java/jre/glnxa64/jre/lib/amd64/server/libjsig.so: Cannot create symlink to ‘../libjsig.so’: Operation not permitted
tar: v912/bin/glnxa64/libMatlabDataArray.so: Cannot create symlink to ‘../../extern/bin/glnxa64/libMatlabDataArray.so’: Operation not permitted
tar: Exiting with failure status due to previous errors
Most of these symbolic links are to files existing in the same directory. I didn't think that it is due to incompatibilities with the host Windows 10 (64-bit) file system, since the tar'd up content is encapsulated within a tar ball. **What are some other reasons for such symlink problems in creating a tar ball?**
I tried archiving one symlink and its target from above, which didn't result in any symlink errors:
cd v912/runtime/glnxa64/
tar czf /media/sf_HostOSusr/tmp/Test.zip libmwmclmcrrt.so libmwmclmcrrt.so.9.12cd v912/runtime/glnxa64/
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