Add instructions on how to fix (most) cache issues when they crop up.

Goutte
1 parent c9ad3ee5
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README.md
@@ -53,3 +53,10 @@ Getting `MemoryErrors` ?
 Try with the `--no-cache-dir` option.
  
 `pip install scipy --no-cache-dir`
+
+### Fix permissions problems with the cache
+
+```
+sudo setfacl  -R -m u:apache:rwx -m u:`whoami`:rwx cache
+sudo setfacl -dR -m u:apache:rwx -m u:`whoami`:rwx cache
+```
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