Problem with aliroot in toolbox c7

• Documentation should be places in to doc/ALICE/faq/README.md

I can't run aliroot or root. After this:

ali='source /cvmfs/alice.cern.ch/etc/login.sh && alienv setenv VO_ALICE@AliPhysics -c /bin/bash'

or this

alis='source /cvmfs/alice.cern.ch/etc/login.sh && alienv setenv VO_ALICE@AliPhysics::vAN-20201115_ROOT6-1 -c /bin/bash'

there is only error

bash: /cvmfs/alice.cern.ch/etc/login.sh: Input/output error

Last time, when I used aliroot everything was fine.