file is not found, but it is right there

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http://unix.stackexchange.com – I have something weird here. Cannot find a file although it is right there. $ skype command not found: skype $ whereis skype skype: /usr/bin/skype /usr/share/skype $ /usr/bin/skype file or directory not found: /usr/bin/skype $ ls -l /usr/bin/skype -rwxr-xr-x 1 root root 21362968 2011-06-08 12:26 /usr/bin/skype $ type /usr/bin/skype /usr/bin/skype is /usr/bin/skype $ which skype /usr/bin/skype Any explanation for that? Happened only with skype so far, no matter if on zsh or bash. I'm on Ubuntu Natty 64, had not encountered anything like that before. (HowTos)