Как предотвратить поглощение Linux менеджером загрузки Windows?

Надеюсь, кому-то станет лучше.

Сначала я использовал команду tsиз moreutils.

#!/usr/bin/env bash

command -v ts > /dev/null 2>&1 [[ $? -ne 0 ]] && { sudo apt install moreutils -y; };

log="./testlog.txt"
comm()
{
        printf "Hi\n";
        echo "here is a wrong command"
        csdf;
        echo "bye"
}

exec 3>&1 1>>${log} 2>&1;
comm | tee /dev/fd/3 | ts;

И безts:

#!/usr/bin/env bash

log="./testlog.txt"
comm()
{
        printf "Hi\n";
        echo "here is a wrong command"
        csdf;
        echo "bye"
}
dddate() 
{
while IFS= read -r line; do
        printf '%s %s\n' "$(date)" "$line"
done
}

exec 3>&1 1>>${log} 2>&1;
comm | tee /dev/fd/3 | dddate;

в файле журнала:

./test.sh: line 10: csdf: command not found
Mon Jul  8 12:23:44 UTC 2019 Hi,
Mon Jul  8 12:23:44 UTC 2019 here is a wrong command
Mon Jul  8 12:23:44 UTC 2019 thanks

В телетайпе:

Hi,
here is a wrong command
thanks