Adding any current directory './' to the search path in Linux [closed]

Answer 1

For the current directory, you can just use a zero-length (null) directory name. You can use an initial or trailing colon, or a double colon. This is from the bash manpage, man bash:

PATH   The  search path for commands.  It is a colon-separated list of
       directories in which the shell looks for commands (see COMMAND EXECUTION
       below).  A zero-length (null) directory name in the value of PATH
       indicates the current directory.  A null directory name may appear as two
       adjacent colons, or as an initial or trailing colon. The default path
       is system-dependent, and is set by the administrator who installs bash.
       A common value is
       ``/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin''.