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Maybe something like this, just an example, in the script:

echo $(date +%s) >> /tmp/mylogfile.txt



# echo $(date +%s) >> /tmp/mylogfile.txt
# cat /tmp/mylogfile.txt
1561379037
# echo...

Did you consider a "here string" (bashism) or a "here document"? Both are available on several recent shells, but not on sh

quick check of manual shows that ndb_mgm understands commands from command line without I/O redirection:


ndb_mgm -e "SHOW"

Also, you don't cram passwords into ssh, you use ssh keys (http://www.linuxproblem.org/art_9.html).

You can do something like this..

for ip_addr in $(cat ip_abc1); do
ssh ${ip_addr} <<EOD
<command>
<command>
EOD
done

Perl is probably the most robust way to send emails with attachments. You need the mime:lite perl utility, but it is well documented.

MIME::Lite - search.cpan.org...

Try adding echo "batch $ip_addr begins" before the ssh command and

echo "batch $ip_addr ends" after the ssh command.

Define the alias in your script before using it. Or, call the aliased command itself.