Включение и отключение записи в лог файл

#!/bin/bash
LOG="$HOME/scripts/umount.log"
echo START SCRIPT: >> $LOG
date +%x-%R >> $LOG

LOG="$HOME/scripts/umount.log"
#LOG="/dev/null"

#!/bin/bash
if [ "$#" -ne 1 ]; then echo usage script condition; fi # если число параметров, переданных скрипту не равно 1
if [ "$1" = true ]; then # если первый параметр равен true, то
    LOG=./log_file.txt
    date=`date '+%D %T'`
    echo start script: $0 -- $date >> $LOG
fi

#LOG="/dev/null"

echo START SCRIPT: >> $LOG
date +%x-%R >> $LOG
(
sleep 1;
echo -en "$USER\r";
sleep 1;
echo -en "$PASSWORD\r";
sleep 1;
echo -en "python /etc/scripts/mount.py\r";
sleep 5;
echo -en "exit\r";
sleep 1;
) | telnet $H >> $LOG

./script.sh $1 $2 $3 ... #$1 $2 $3  - номера параметров скрипта

if [ "$#" -ne 3 ]; then echo usage script parameter1 parameter2 condition; exit 1; fi # если число параметров, переданных скрипту не равно 3

echo START SCRIPT: >> $LOG
date +%x-%R >> $LOG
(
sleep 1;
echo -en "$USER\r";
sleep 1;
echo -en "$PASSWORD\r";
sleep 1;
echo -en "python /etc/scripts/mount.py\r";
sleep 5;
echo -en "exit\r";
sleep 1;
) | telnet $H >> $LOG

#LOG="$HOME/scripts/umount.log"
LOG="/dev/null"

#!/bin/bash
if [ "$#" -ne 1 ]; then echo usage script condition; exit 1; fi # если число параметров, переданных скрипту не равно 1 выходим с кодом 1
if [ "$1" = true ]; then # если первый параметр равен true, то
    LOG=./log_file.txt
elif [ "$1" = false ]; then
    LOG="/dev/null"
fi
echo START SCRIPT: >> $LOG
date +%x-%R >> $LOG
(
sleep 1;
echo -en "$USER\r";
sleep 1;
echo -en "$PASSWORD\r";
sleep 1;
echo -en "python /etc/scripts/mount.py\r";
sleep 5;
echo -en "exit\r";
sleep 1;
) | telnet $H >> $LOG

#!/bin/bash
USER="root"
# PASSWORD="root"
LOG="/volume1/public/e2_scripts/mount.log"
LOGGING=true
 
function Log()
{
 if "$LOGGING"; then
    echo $1 >> $LOG 
 fi
}
 
HOSTS="
192.168.1.41
192.168.1.46
"
for H in $HOSTS
do
Log 'START SCRIPT:'
Log `date '+%x-%R'`
output="$((
sleep 1;
echo -en "$USER\r";
sleep 1;
# echo -en "$PASSWORD\r";
# sleep 1;
echo -en "python /etc/enigma2/mount_net_share.py\r";
sleep 5;
echo -en "exit\r";
#sleep 1;
) | telnet $H)"
Log "$output"
Log '==================================='
done

## пример 1
exec >>"/tmp/logfile.out"
exec 2>>"/tmp/logfile.err"
 
## пример 2
#exec >>"/tmp/logfile.log"
#exec 2>&1
 
hostname
bla -bla -bla
date