Create a new user for rstudio free

addRUser.sh

#!/bin/bash

HTTPADDR=http://rstudio-webpage/
HELPADDR=http://helppage/

#Skeleton to use (put Renviron in there for example
SKEL=/opt/ruser-skel

MAILSENDER=rsupport@domain.tld

# This script uses the folder name of the user and adds this suffix to it (without the @!)
MAILSUFFIX=mydomain.tld

echo "This script let you create a new R user easily!"
echo "This requires, that you enabled mail functionality"
echo
read -p "Enter the username for the new user: " UNAME

if [ "$UNAME" == "" ]; then
        echo "No user provided!"
        exit 1;
fi

echo
echo "Creating user..."
useradd -m $UNAME

if [ ! -d "/home/$UNAME" ]; then
        echo "Homefolder does not exist, something went wrong!"
        exit 1
fi

echo "Generate a new password for the user..."
PW=`< /dev/urandom tr -dc _A-Z-a-z-0-9 | head -c8`

echo "Set new password ($PW)..."
echo -e "$PW\n$PW" | passwd $UNAME

echo "Create default Reinviron..."
cp -r $SKEL/. /home/$UNAME

echo "Fix Home permissions"
chmod o-rwx /home/$UNAME

echo "Adding user to smbpasswd file..."
echo -e "$PW\n$PW" | smbpasswd -a -s $UNAME

tmp=$(tempfile)

echo "From: RServer Support <$MAILSENDER>" >> $tmp
echo "Subject: Your new R-Server account" >> $tmp
echo >> $tmp
echo "Hello new R User!" >> $tmp
echo >> $tmp
echo "An administrator just created a new account for the R-Server at $HTTPADDR !" >> $tmp
echo "You may login with the follwing credentials:" >> $tmp
echo >> $tmp
echo "  * Username:     $UNAME" >> $tmp
echo "  * Password:     $PW" >> $tmp
echo >> $tmp
echo "IMPORTANT: Please change your password after your first login!" >> $tmp
echo "You can find a tutorial (among others) for how to do it here: $HELPADDR" >> $tmp
echo >> $tmp
echo "INFO: Please have a look at $HELPADDR for other useful informations, like connecting a network drive for data exchange, as well!" >> $tmp
echo >> $tmp
echo "Regards," >> $tmp
echo "-The R-Server" >> $tmp

MAIL="$UNAME@$MAILSUFFIX"
read -p "Is this email correct: '$MAIL'? " YN

case "$YN" in
        "n" | "N")
        read -p "Enter correct email: " MAIL
        ;;
esac

sendmail $MAIL < $tmp

echo "User created, mail sent!"
rm $tmp
exit