First versions of the binaries and source file.

what

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+#!/bin/sh
+# Where is the binary?
+# Usage: what [<keyword>]
+# Returns:
+#   With no parameters, all visible binaries in PATH.
+#   With parameter, all binaries that match the pattern
+#   given. Accepts default grep patterns, case insensitive
+#
+# Examples:
+# $ what zs.*
+#  pzstd
+#  zsh
+#  zstd
+#
+# $ what ftp
+#  ftppass
+#  sftp
+#  vsftpd
+#
+# $ what ftp | xargs which
+#  /usr/bin/ftppass
+#  /usr/bin/sftp
+#  /usr/sbin/vsftpd
+#
+
+PWD=/
+ALL_BINS=$(cd / && echo $PATH | sed 's/[:]/ /g' |  xargs ls -A | grep -v ":" | sort | uniq)
+OUTPUT=$(printf '%s\n' "-n" $ALL_BINS | grep -i "$1")
+echo "$OUTPUT"