append_users.sh

#!/bin/bash

# What I really would like would be to have the user ID iqual to the student ID, but it can't be.
# The file /etc/group is used for knowing who is currently a member of some group
# please unsure that the following groups exist: student

MIN_UID=1200 # Users created in 2021/2022 start at 1165

if [ $# -lt 1 ]; then
  echo "please provide the filename containing the new users"
  exit 1
elif [ ! -f "$1" ]; then
  echo "The filename containing the new users does not exist"
  exit 2
fi
newusers=$1

# possible groups: tm, pcl, msc, phd, ceb
# group=tmcd

if [ $# -eq 2 ] && [ $( grep -c "^$2:" /etc/group ) -gt 0 ]; then
  group=$2
else
  echo "ERROR: Please provide the group name. aborting"
  exit 1
fi

echo "Adding users to the group: $group"

if [ -n "$admin_email_pass" ]; then
   echo -n "Press <enter> to start appending additional students (Mail server password already set)"
else
   echo -n "E-mail server password: "
   read -s admin_email_pass
   export admin_email_pass
   echo -n "Press <enter> to start appending additional students"
fi 
read ok

cat $newusers | iconv -f UTF-8 -t 'ASCII//TRANSLIT' | while read line; do
  username=$( echo "$line" | awk -F'\t' '{print $1}')
  match=$(grep -c "^$username:" /etc/passwd )
  if [ $match -ne 0 ]; then
     echo "Warning: user $username already exists. Adding groups only"
  else
    nome=$( echo "$line" | awk -F'\t' '{print $2}')
    email=$( echo "$line" | awk -F'\t' '{print $3}')
    adduser --firstuid $MIN_UID --ingroup student --gecos "$nome,,,,$email" --disabled-login $username
    chmod 700 /home/$username
    ./reset_password.sh $username $email
  fi

  adduser $username $group
  if [ $( grep -c "^jupyterhub:" /etc/group ) -gt 0 ]; then
    adduser $username jupyterhub
    # Please don't forget to manually add these users later on in the jupyterhub interface
  fi

done