source: source filename [arguments]
Execute commands from a file in the current shell.
Read and execute commands from FILENAME in the current shell. The
entries in $PATH are used to find the directory containing FILENAME.
If any ARGUMENTS are supplied, they become the positional parameters
when FILENAME is executed.
Returns the status of the last command executed in FILENAME; fails if
FILENAME cannot be read.
bash: help: no help topics match `bash'. Try `help help' or `man -k bash' or `info bash'.