ok, i am almost crying, but his is as far as i got:
pi@raspberrypi:~ $ cd /home/pi
pi@raspberrypi:~ $ ce /home
bash: ce: command not found
pi@raspberrypi:~ $ cd /home
pi@raspberrypi:/home $ cd /pi
bash: cd: /pi: No such file or directory
pi@raspberrypi:/home $ sudo cd /pi
sudo: cd: command not found
pi@raspberrypi:/home $ cd /pi
bash: cd: /pi: No such file or directory
pi@raspberrypi:/home $ cd
pi@raspberrypi:~ $ sudo cd /home
sudo: cd: command not found
pi@raspberrypi:~ $
is it because i am using VNC viewer to remote in to my Pi?
EDIT:
so i did the @Dmitriy method:
pi@raspberrypi:~ $ ps -aux | grep java
root 380 3.0 15.4 227236 68588 ? Sl Aug27 102:00 java -jar /home/pi/server-0.17.0.jar -dataFolder /home/pi/Blynk
pi 22292 0.0 0.4 4272 2000 pts/0 S+ 11:25 0:00 grep --color=auto java
pi@raspberrypi:~ $ sudo kill 380
pi@raspberrypi:~ $ ps -aux | grep java
pi 22307 0.0 0.4 4268 1972 pts/0 S+ 11:25 0:00 grep --color=auto java
pi@raspberrypi:~ $ sudo java -jar server-0.17.2.jar -dataFolder /home/pi/Blynk
then it said:
Blynk Server successfully started.
All server output is stored in folder '/home/pi/./logs' file.
then i changed the crontab thingy and it seems to have worked OK.