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I accidentally typed cd // instead of cd .. and something weird happened.
The directory // doesn't exist, what's going on here exactly.

root@root:/var/www/html# cd //
root@root://# pwd
//
root@root://# cd ..
root@root://# 
  • // is usually the same as / . cd // is same as cd / – janasaiarun Feb 28 '18 at 6:56