Is there a shell command for outputing absolute path for specified program? I'd like to know where executable binary file is.
will give you every information about
All of the above, with some caveats:
whereis -- searches for matches (by default) on some pre-set directories. The list is available on 'man whereis', and can be passed as a parameter
which -- searches for executable files in the current environment (in other words, executables that can be found in the directories listed in the environment variable PATH
(bash) type -- if 'name' is an alias, it lists the alias definition, but not necessarily the path of any executables in the definition.
Another option, more generic, is mlocate.