alumno=`whoami`
cd /home/$alumno/examen_$alumno
echo $alumno > $alumno.txt
echo "******" >> $alumno.txt
ls /home >> $alumno.txt
echo "******" >> $alumno.txt
echo " historiarl :" >> $alumno.txt
history -w
history -a
cat /home/$alumno/.bash_history | tail -n 100 >> $alumno.txt
 >> $alumno.txt
echo "******" >> $alumno.txt

tree >> $alumno.txt
echo "******" >> $alumno.txt
ls -lr >> $alumno.txt
echo "******" >> $alumno.txt
echo "pruebaln ->ok" >> archivo1
cat dir1/archivo1 >> $alumno.txt
