once i click Tab on bash, the error message will appear, what\'s wrong?
symlink-hook: error retrieving current directory: getcwd: cannot access parent directorie
This usually occurs when your current directory does not exist anymore. Most likely, from another terminal you remove that directory (from within a script or whatever). To get rid of this, in case your current directory was recreated in the meantime, just cd
to another (existing) directory and then cd
back; the simplest would be: cd; cd -
.