Hello,

I have coded something that can be easily implemented, as file under /usr/bin/watchlog:

#!/bin/sh
# declarations
[ ! -f  $HOME/.watchlogrc ] && echo "5"   > $HOME/.watchlogrc
TIMING=`cat $HOME/.watchlogrc`
#echo "> $@  command line started. <"
MSG=$@
if [ "--set-time" = "$1"  ] ; then
        echo "$2"   > $HOME/.watchlogrc
        exit
fi
if [ "--help" = "$0"  ] ; then
        echo "--help, or --set-time 5  (corresponding to e.g. 5 seconds), or a command line to be done every e.g. 5 seconds"
        echo "typical application : /usr/bin/watchlog  'date > $HOME/.log-file'"
        exit
fi
while [  1  ] ; do
    bash -c " $MSG "
    sleep "${TIMING}s"
done


(I am not expert in linux / coder)
This code is quite useful, since it can be used for screen directly:

#.screenrc
# status
hardstatus alwayslastline "%{= Yk} %H %{= yk}%-Lw%{= kG}%50> %n%f* %t %{-}%+Lw%< %=  %{= yk} %l %{= Yk} %0c:%s %d/%m %{-}"
# add CPU idle/sustem/user/interrupt stats
backtick 100 5 5 tail -n 1 $HOME/.log
caption always '%{= kY} %200` %= %100` %='
bindkey ^[[1;5A prev
bindkey ^[[1;5B next
bindkey ^[[1;5D prev
bindkey ^[[1;5C next
bindkey ^N screen
bindkey ^[[1;2D prev
bindkey ^[[1;2C next

It is a nice add-on eventually that requires to long typing, it is already in the /usr/bin and is few kb only.

Watch is cool

All the best,
Best regards
Yellow