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https://linuxcommand.org/lc3_man_pages/doth.html

NAME . - Execute commands from a file in the current shell.

SYNOPSIS . filename [arguments]

DESCRIPTION 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.

Exit Status:
Returns the status of the last command executed in FILENAME; fails if
FILENAME cannot be read.

SEE ALSO bash(1)

IMPLEMENTATION GNU bash, version 5.0.17(1)-release (x86_64-redhat-linux-gnu) Copyright (C) 2019 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html