How do I save the output of a script to a file?

Question

I have the following script:


LOOKUPS=/tmp/$0.LOOKUPS.$$
OK=/tmp/$0.OK.$$
KO=/tmp/$0.KO.$$
NOVENUE=/tmp/$0.NOVENUE.$$

trap "rm -f $LOOKUPS $OK $KO $NOVENUE" 0 1 2 3 4 5 13 15

tu=`$APP_SERVICE | cut -b 9-11`
date=`date +%Y%m%d`
echo "date before change: ${date}"
H=$(date +%H)
if [[ $H -ge 0 && $H -lt 9 ]]
then
        trt_date=$(date --date 'yesterday' +'%Y%m%d')
       echo "date changed: ${date}"
else
        echo "date didnt change: ${date}"
fi

grep "^$date.*lookup .. for.*" $UTP_LOG_DIR/logs.* | awk '{print $13"_"$4" "$11" "$17"="$19" "$20"="$23}' | sed 's/\[.*\]//g' | sed -e 's/string{//g' -e 's/, / /g' -e 's/=(/=/g' -e 's/)).//g' -e 's/}//g' | sort -u > $LOOKUPS

grep " OK " $LOOKUPS | awk '{print $1" "$3" "$4}' > $OK
grep " KO " $LOOKUPS | awk '{print $1" "$3" "$4}' > $KO
grep "^$date.*Can't find a venue for" $UTP_LOG_DIR/logs.* | sed 's/-$//g' | awk '{print $NF}' | sort -u > $NOVENUE

while read line
do
        if [ $(grep "$line" $OK | wc -l) -eq 0 ]
        then
                isin=$(echo $line | cut -d'_' -f1)
                feed=$(echo $line | cut -d'_' -f2,3)
                filters=$(echo "$line" | cut -d' ' -f2-)

                echo Fail lookup for $isin in feed $feed with filters: "$filters"
        fi
done < $KO

while read line
do
        if [ $(grep "$line" $OK | wc -l) -eq 0 ]
        then
                echo Cannot find venue for $line
        fi
done < $NOVENUE

To generate an output file, I redirect stdout to a file with lookup.sh > file.txt

But I need it to create the output file automatically.

What do you mean by automatically? Which file should it be saved to? Why can't you use redirection as you have proposed? — user1794469, Feb 13 '20 at 14:50
script will be placed in multiple hosts and one master host will order to execute the script and get the output file. I need that when generating the output file it uses a specific environment variable has its name.
Also to avoid any problem executing the script and not output file is found. — anmoreira, Feb 13 '20 at 14:55
@anmoreira note that all of what you describe can (and usually should) be handled by the process that executes the script on the different servers. — terdon, Feb 13 '20 at 15:46
Put updates in the question, and arrange words in to sentences (I can't workout what your are trying to say). — ctrl-alt-delor, Feb 13 '20 at 18:20

score 4 · Accepted Answer · answered Feb 13 '20 at 18:19

4

In the file, encapsulate the whole script in

{


} > file.txt

It will redirect stdout of everything within the {}.

answered Feb 13 '20 at 18:19

ctrl-alt-delor

27,993

score 0 · Answer 2 · answered Feb 14 '20 at 18:15

0

You can always stuff into a file by e.g. echo Something > the-file.

answered Feb 14 '20 at 18:15

vonbrand

18,253

How do I save the output of a script to a file?

2 Answers2