UNIX for Dummies Questions & Answers

script1 > filea &
script2 > filea &
script3 > filea &
script4 > filed &
wait
cat filea fileb filec filed > bigfile

{
sh test.sh > 1.log
sh test2.sh > 2.log
sh test3.sh > 3.log
sh test4.sh > 4.log

cat *.log > combine.log
}

cat main.sh

{
sh test.sh > 1.log
sh test2.sh >> 1.log
sh test3.sh >> 1.log
sh test4.sh >> 1.log
}

test1.sh &
test2.sh &
test3.sh &


log_1 > new.txt
log_2 >> new.txt
log_3 >> new.txt

#test3.sh

while [ $i le 20 ]
do
echo "$1"
i=`expr $i + 1`
done

1
2
3
4
5

parallel '{} >{.}.out' ::: sample*.sh

seq 4 | parallel "sample{}.sh > {}.out"

wget http://git.savannah.gnu.org/cgit/par...n/src/parallel
    chmod 755 parallel
    cp parallel sem