How to log output of multiple shell scripts - linux

Question

I am not familiar with this platform, so if this is in the frozen section my apologies :P
I am working on upgrading a raspberry pi script project. It decodes NOAA APT Satellite images and it runs from AT Scheduler (I think) and scripts. Scripts are used to start recordings and do auto processing.
I have been having some problems and am trying to get a log of what is processed through the scripts, their are 3. I have tired adding something like ...) >> log.txt to the files but they are always empty.
I cant call them as sh -x script.sh >>log.txt because they are scheduled to trigger at different times and it would be a pain to replace all the calls.
Idealy i would like something i could add at the end of each script to log all the things they process and stick them in their own log file (script1.log, script2.log, script3.log)
Thanks!!
Jake
edit: I was advised to post the scripts. These are not "mine" i got them off of an instructable and made some changes to fit my needs. And i would rather not screw them up more than i have. ideally i would like something i could put after the #!/bin/bash line where it would log all of the commands processed by the script.
Thanks!
Script 1, the main scheduling script. some of them have been comented out because i dont use NOAA 15 or Meteor M2.
#!/bin/bash
# Update Satellite Information
wget -qr https://www.celestrak.com/NORAD/elements/weather.txt -O /home/pi/weather/predict/weather.txt
#grep "NOAA 15" /home/pi/weather/predict/weather.txt -A 2 > /home/pi/weather/predict/weather.tle
grep "NOAA 18" /home/pi/weather/predict/weather.txt -A 2 >> /home/pi/weather/predict/weather.tle
grep "NOAA 19" /home/pi/weather/predict/weather.txt -A 2 >> /home/pi/weather/predict/weather.tle
#grep "METEOR-M 2" /home/pi/weather/predict/weather.txt -A 2 >> /home/pi/weather/predict/weather.tle
#Remove all AT jobs
for i in `atq | awk '{print $1}'`;do atrm $i;done
#Schedule Satellite Passes:
/home/pi/weather/predict/schedule_satellite.sh "NOAA 19" 137.1000
/home/pi/weather/predict/schedule_satellite.sh "NOAA 18" 137.9125
#/home/pi/weather/predict/schedule_satellite.sh "NOAA 15" 137.6200
script 2, the individual satellite scheduler. It uses information from the first script to find times the satellite is passing overhead.
#!/bin/bash
PREDICTION_START=`/usr/bin/predict -t /home/pi/weather/predict/weather.tle -p "${1}" | head -1`
PREDICTION_END=`/usr/bin/predict -t /home/pi/weather/predict/weather.tle -p "${1}" | tail -1`
var2=`echo $PREDICTION_END | cut -d " " -f 1`
MAXELEV=`/usr/bin/predict -t /home/pi/weather/predict/weather.tle -p "${1}" | awk -v max=0 '{if($5>max){max=$5}}END{print max}'`
while [ `date --date="TZ=\"UTC\" #${var2}" +%D` == `date +%D` ]; do
START_TIME=`echo $PREDICTION_START | cut -d " " -f 3-4`
var1=`echo $PREDICTION_START | cut -d " " -f 1`
var3=`echo $START_TIME | cut -d " " -f 2 | cut -d ":" -f 3`
TIMER=`expr $var2 - $var1 + $var3`
OUTDATE=`date --date="TZ=\"UTC\" $START_TIME" +%Y%m%d-%H%M%S`
if [ $MAXELEV -gt 28 ]
then
echo ${1//" "}${OUTDATE} $MAXELEV
echo "/home/pi/weather/predict/receive_and_process_satellite.sh \"${1}\" $2 /home/pi/weather/${1//" "}${OUTDATE} /home/pi/weather/predict/weather.tle $var1 $TIMER" | at `date --date="TZ=\"UTC\" $START_TIME" +"%H:%M %D"`
fi
nextpredict=`expr $var2 + 60`
PREDICTION_START=`/usr/bin/predict -t /home/pi/weather/predict/weather.tle -p "${1}" $nextpredict | head -1`
PREDICTION_END=`/usr/bin/predict -t /home/pi/weather/predict/weather.tle -p "${1}" $nextpredict | tail -1`
MAXELEV=`/usr/bin/predict -t /home/pi/weather/predict/weather.tle -p "${1}" $nextpredict | awk -v max=0 '{if($5>max){max=$5}}END{print max}'`
var2=`echo $PREDICTION_END | cut -d " " -f 1`
done
the final script takes care of recording the audio from the satellite at the specified frequency, calculated for dopler shift, auto decodes/processes it, and posts it to my archive and webserver.
#!/bin/bash
# $1 = Satellite Name
# $2 = Frequency
# $3 = FileName base
# $4 = TLE File
# $5 = EPOC start time
# $6 = Time to capture
sudo timeout $6 rtl_fm -f ${2}M -s 60k -g 45 -p 55 -E wav -E deemp -F 9 - | sox -t wav - $3.wav rate 11025
#pass start 150 was 90
PassStart=`expr $5 + 150`
if [ -e $3.wav ]
then
/usr/local/bin/wxmap -T "${1}" -H $4 -p 0 -l 0 -o $PassStart ${3}-map.png
/usr/local/bin/wxtoimg -m ${3}-map.png -e ZA $3.wav ${3}.png
/usr/local/bin/wxtoimg -m ${3}-map.png -e NO $3.wav ${3}.NO.png
/usr/local/bin/wxtoimg -m ${3}-map.png -e MSA $3.wav ${3}.MSA.png
/usr/local/bin/wxtoimg -m ${3}-map.png -e MCIR $3.wav ${3}.MCIR.png
/usr/local/bin/wxtoimg -m ${3}-map.png -e MSA-PRECIP $3.wav ${3}.MSA-PRECIP.png
/usr/local/bin/wxtoimg -m ${3}-map.png -e EC $3.wav ${3}.EC.png
/usr/local/bin/wxtoimg -m ${3}-map.png -e HVCT $3.wav ${3}.HVCT.png
/usr/local/bin/wxtoimg -m ${3}-map.png -e CC $3.wav ${3}.CC.png
/usr/local/bin/wxtoimg -m ${3}-map.png -e SEA $3.wav ${3}.SEA.png
fi
NOW=$(date +%m-%d-%Y_%H-%M)
mkdir /home/pi/weather/Pictures/${NOW}
sudo cp /home/pi/weather/*.png /home/pi/weather/Pictures/${NOW}/ #move pictures to date folder in pi/pictures
sudo mv /var/www/html/APT_Pictures/PREVIOUS/* /var/www/html/APT_Pictures/ARCHIVE #move previous to archive
sudo mv /var/www/html/APT_Pictures/LATEST/* /var/www/html/APT_Pictures/PREVIOUS #move latest pictures to previous folder
sudo cp /home/pi/weather/Pictures/${NOW} /var/www/html/APT_Pictures/LATEST -r #copys date folder to latest
sudo cp /home/pi/weather/*-map.png home/pi/weather/Pictures/${NOW}/ #copys map to archive folder
##sudo mv /home/pi/weather/Pictures/${NOW}/*-map.png /home/pi/weather/maps #moves map from /pi/pictures date to maps folder
sudo rm /home/pi/weather/*.png #removes pictures from weather folder
sudo mv /home/pi/weather/*.wav /home/pi/weather/audio #moves audio to audio folder

Answer 1

Perhaps the scripts are outputing status messages to stderr instead of stdout (which your ...) >> log.txt method would have captured.)?
Here's how I'd capture stdout and stderr for debugging purposes.
$ /bin/bash script1.sh 1>>script1_stdout.log 2>>script1_stderr.log
$ /bin/bash script2.sh 1>>script2_stdout.log 2>>script2_stderr.log
$ /bin/bash script3.sh 1>>script3_stdout.log 2>>script3_stderr.log
Or combine the two streams into a single log file:
$ /bin/bash script1.sh 1>>script1.log 2>&1
$ /bin/bash script2.sh 1>>script2.log 2>&1
$ /bin/bash script3.sh 1>>script3.log 2>&1
The "1" in 1>> refers to stdout and the "2" in 2>> refers to stderr.
Edit: If you want to continue to see stdout/stderr messages and still write them to file, use tee as described here. tee prints stdin it receives, writes a copy of stdout to the file path provided.
$ /bin/bash script1.sh 2>&1 | tee script1.log
$ /bin/bash script2.sh 2>&1 | tee script2.log
$ /bin/bash script3.sh 2>&1 | tee script3.log
Reference about stdout and stderr.