log_file="/some/dir/log_file.log"
echo "some text" >> $log_file
do_some_command
echo "more text" >> $log_file
do_other_command

command | tee -a "$log_file"

. 8<<-IOHERE /proc/self/fd/8

command
…
fn() { declaration ; } <<WHATEVER
# though a nested heredoc might be finicky
# about stdin depending on shell
WHATEVER
cat -u ./stdout | ./works.as >> expect.ed
IOHERE

cat ./*.sh | . /dev/stdin

. 5<<EOIN /dev/fd/5 |
    tee -a ./log.file | cat -u >$(tty)
script
…
more script
EOIN

. 3<<HD ${fdpath}/3
: ${vars=$(printf '${var%s=$((%s*2))},' `seq 1 100`)}
HD
echo $vars
> 4,8,12…
echo $var1 $var51
> 4 104

{ or ( command ) list ; } | tee -a ea.sy >>pea.sy

echo "Found OLD run script $oldrunscriptname"
echo "Please run OLD tmunsetup script first!"

#!/bin/bash
# A Shell subroutine to echo to screen and a log file

LOGFILE="junklog"

echolog()
(
echo $1
echo $1 >> $LOGFILE
)


echo "Going"
echolog "tojunk"

# eof