bash script - add thousands system users

#!/bin/bash
#may 26 2006
passfile=test.txt

n=1
rm -rf go #delete any go file
echo "#!/bin/bash" >> go # prepare file to be as bash script file

for name in $(awk 'BEGIN {FS=":"}{print $1}' < "$passfile" ) #parse input file separated by :
do
array1[$n]=$name #and store them to arrays
let "n += 1" # grade 1
done # end of for loop
n=1

for name in $(awk 'BEGIN {FS=":"}{print $2}' < "$passfile" )
do
array2[$n]=$name
let "n += 1"
done

n=1

for name in $(awk 'BEGIN {FS=":"}{print $3}' < "$passfile" )
do
array3[$n]=$name
let "n += 1"
done

i=0
for ((i=1; i<n; i++))
do
echo ${array1[$i]} # prints username
echo ${array2[$i]} # as well as password
echo ${array3[$i]} # then comment name or ID name
echo "useradd -d /home/${array1[$i]} ${array1[$i]} -p ${array1[$i]} -s /bin/false -c ' ${array3[$i]} '" >> go
done

chmod 755 go # make it bash executable
./go # now execute it

exit 0

#############

comment:

customized input file: test.txt

contains:

uname:pword:Super_Man

test1:pword2:JOHN_TAMAD

test2:testpass2:testname2

test3:testpass3:testname3

***note of UNDERSCORE as Full Name field

output file: go (executable bash script)remarks: script will process input file, save output to output file and execute the output file

** user group were not included when adding

application:

reduced finger tiredness, copy and paste