==> ./users/users.txt <==
adam:pass1:prowadzacy
tomek:pass2:prowadzacy
pawel:pass3:student
jakub:pass4:student
asia:pass5:student

==> ./users/zad1.sh <==
#!/bin/bash

FILE_NAME="$1"

# groupadd student
# groupadd prowadzacy

cat "$FILE_NAME" | cut -d : -f 3 | sort -u | xargs -I '{}' groupadd '{}'

cat "$FILE_NAME" | while read line; do
  USER="$(echo $line | cut -d : -f 1)"
  PASSWD="$(echo $line | cut -d : -f 2)"
  GROUP="$(echo $line | cut -d : -f 3)"
  echo "$USER $PASSWD $GROUP"
  useradd -m "$USER" -s /bin/bash
  usermod -aG "$GROUP" "$USER"
  echo "$USER:$PASSWD" | chpasswd
  # userdel -r "$USER"
done


==> ./backup/zad3.sh <==
#!/bin/bash

mkdir -p /var/katalog.bak
DATE="$(date +'%Y%m%d')"

tar czf /var/katalog.bak/katalog-"$DATE".tar.gz -C /var katalog

==> ./share/zad2.sh <==
#!/bin/bash

DIRECTORY_PATH="$1"

rm -rf "$DIRECTORY_PATH"

mkdir -p "$DIRECTORY_PATH"
chown adam:prowadzacy "$DIRECTORY_PATH"
chmod 0770 "$DIRECTORY_PATH"
chmod g+s "$DIRECTORY_PATH"
chmod o+t "$DIRECTORY_PATH"
setfacl -d -m u::rwx "$DIRECTORY_PATH"
setfacl -m g:student:rwx "$DIRECTORY_PATH"