I start all of my scripts with the following shebang. [...]
#!/usr/bin/env perl
Digging into the details, this starts the env program, which then searches for the first perl executable in $ENV{PATH}. So this increases the startup time slightly. Also, env is not always in /usr/bin. Some Linux distributions put it into /bin and add a symlink in /usr/bin. Some other Unixes have env only in /bin, with no symlink in /usr/bin. In that case, all of your scripts will simply fail. See also far more you ever wanted to know about #!.
Alexander
--
Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)
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