Adding email to shell scripts

Question

if [[ -s dbverify.out ]];then
cat dbverify.out | mailx -s "DBVerify results for $(uname -n): Errors" '[email protected]'
else
echo "No errors" | mailx -s "DBVerify results for $(uname -n): No errors" '[email protected]'
fi
New to shell scripts, This is script, i want to add few more email addresses , will this work?
'[email protected], [email protected], [email protected]'

Answer 1

Anything not in square brackets [] is required.
Anything in square brackets [] is optional.
Ellipses "..." means any number of the same, like "arg ..." means at least one "arg" but as many more as you need.
A comma-separated list looks like "arg,..." or the "arg", a comma, and then ellipses.
So:
$ man mailx
shows:
mailx [-s subject] address...
which means:
The token "mailx" is required.
The mail subject may optionally be specified using the "-s subject" switch. Note that since only one token "subject" is used for the mail subject, you can use only a single command line token; if your subject needs spaces in it, you must use quotes to make it a single token:
$ mail -s 'This subject has spaces' [email protected]
Now, since the "address..." does not have a common between "address" and the "..." you do not separate the email addresses by commas -- use whitespace.
I know reading man(1) pages takes a bit of getting used to. They are designed as a memory aid, not instructional material. Often you can use the info(1) tool for more details. For example:
$ man make
$ info mailx
give vastly different documentation.
Hope this helps.