which returns the pathnames of the files (or links) which would be executed in the currente

langu@langu:~/linuxk/link/libstatic$ which gcc
/usr/bin/gcc

WHICH(1)                                                                                 WHICH(1)

NAME
       which - locate a command

SYNOPSIS
       which [-a] filename ...

DESCRIPTION
       which returns the pathnames of the files (or links) which would be executed in the current
       environment, had its arguments been given  as  commands  in  a  strictly  POSIX-conformant
       shell.   It does this by searching the PATH for executable files matching the names of the
       arguments. It does not follow symbolic links.

OPTIONS
       -a     print all matching pathnames of each argument

EXIT STATUS
       0      if all specified commands are found and executable

       1      if one or more specified commands is nonexistent or not executable

       2      if an invalid option is specified

Debian                                      1 May 2009                                   WHICH(1)