$ for file in test?*.bashrc testvarscreenrc template; do echo "=== $file"; cat "$file"; done; echo "==="
=== test0.bashrc
. ~/session/testcommon.bashrc
cd ~/test
echo Test
# history -n
# history 10
# history -s 123
=== test10.bashrc
. ~/session/testcommon.bashrc
cd ~/test
echo Test
# history -n
history 10
# history -s 123
=== test10s.bashrc
. ~/session/testcommon.bashrc
cd ~/test
echo Test
# history -n
history 10
history -s 123
=== testcommon.bashrc
echo Common
#. /etc/bash.bashrc
#. ~/.bashrc
PS1='$ '
HISTFILE=~/session/test_history
unset HISTTIMEFORMAT
=== testn.bashrc
. ~/session/testcommon.bashrc
cd ~/test
echo Test
history -n
# history 10
# history -s 123
=== testn10.bashrc
. ~/session/testcommon.bashrc
cd ~/test
echo Test
history -n
history 10
# history -s 123
=== testn10s.bashrc
. ~/session/testcommon.bashrc
cd ~/test
echo Test
history -n
history 10
history -s 123
=== testns.bashrc
. ~/session/testcommon.bashrc
cd ~/test
echo Test
history -n
# history 10
history -s 123
=== tests.bashrc
. ~/session/testcommon.bashrc
cd ~/test
echo Test
# history -n
# history 10
history -s 123
=== testvarscreenrc
source ../.screenrc

screen -t test 0 bash --rcfile ~/session/$testvar.bashrc
=== template
foo
bar
baz
qux
===
$

$ cp -a template test_history && testvar=test10s screen -Rd test -c ~/session/testvarscreenrc