dostoyevski
New Member
how can i execute a .jar file automatically everytime i start ubuntu?
execute .jar file on system start.
- Thread starter dostoyevski
- Start date
NOTE*: You will need root privileges to do this.
cd /root
wget http://somewebserver.com/firstboot.sh
chmod 744 firstboot.sh
echo "@reboot root /bin/bash /root/firstboot.sh" >> /etc/crontab
================ firstboot.sh ============
#!/bin/bash
export JAVA_HOME=/path/to/java
java /path/to/my.jar
# This will delete this cronjob. Don't add this part if you want this every reboot.
/bin/cat /etc/crontab | /bin/grep -v firstboot > /etc/crontab.tmp
/bin/rm -f /etc/crontab
/bin/mv /etc/crontab.tmp /etc/crontab
rm -f $0
====================================
The downside is, you lose any other root cron jobs. There is a way around this.
cd /root
wget http://somewebserver.com/firstboot.sh
chmod 744 firstboot.sh
echo "@reboot root /bin/bash /root/firstboot.sh" >> /etc/crontab
================ firstboot.sh ============
#!/bin/bash
export JAVA_HOME=/path/to/java
java /path/to/my.jar
# This will delete this cronjob. Don't add this part if you want this every reboot.
/bin/cat /etc/crontab | /bin/grep -v firstboot > /etc/crontab.tmp
/bin/rm -f /etc/crontab
/bin/mv /etc/crontab.tmp /etc/crontab
rm -f $0
====================================
The downside is, you lose any other root cron jobs. There is a way around this.
OP
dostoyevski
New Member
ok, and what is "path to java"? the path to jdk?
Yes, usually up to, but not including the "bin" directory.
OP
dostoyevski
New Member
the link http://somewebserver.com/firstboot.sh shows "server not found".
It was an example url used to show you how the setup could work.
OP
dostoyevski
New Member
i'm trying to start from the basic, and i try with this with crontab but doesn't work:
57 18 * * * /usr/local/netbeans-8.2rc/bin/netbeans
it should start netbeans at 18:57 but it doesn't. What's wrong?
thanks in atvance.
57 18 * * * /usr/local/netbeans-8.2rc/bin/netbeans
it should start netbeans at 18:57 but it doesn't. What's wrong?
thanks in atvance.
How are you creating the crontab?
You should use "crontab -e" .
What user are you running the crontab as? Does that user have permissions to run netbeans?
*debug*
What happens when you simply run the command in the crontab? Do you get any errors?
Netbeans is a developer IDE, it wants a Xwindows GUI to run in. Is Xwindows running?
Are you logged in as the user the crontab is running as?
You should use "crontab -e" .
What user are you running the crontab as? Does that user have permissions to run netbeans?
*debug*
What happens when you simply run the command in the crontab? Do you get any errors?
Netbeans is a developer IDE, it wants a Xwindows GUI to run in. Is Xwindows running?
Are you logged in as the user the crontab is running as?
Since it's netbeans is a graphical IDE sounds more like it should be automatically started in the user session. Depending on what DE you are using it will differ, if you are using Ubuntu's default(Gnome3) DE you can search for "Tweak Tool" in the menu open it and then select the sessions tab or something like that. After which you probably have to click and select the application you automatically want to start after login.
Last edited:
OP
dostoyevski
New Member
actually what I want to run is a bash file, (netbeans was just for testing). This is the bash file:
#! / bin / bash
export JAVA_HOME = / usr / lib / jvm / jdk1.8.0_261
java -jar /home/luilli/Desktop/dist/table.jar
and this is the crontab command:
32 12 * * * /home/luilli/firstboot.sh
has permissions to run, change them with:
chmod 744 firstboot.sh
i tryed to run the bash file directly from the terminal , and it runs perfect.
#! / bin / bash
export JAVA_HOME = / usr / lib / jvm / jdk1.8.0_261
java -jar /home/luilli/Desktop/dist/table.jar
and this is the crontab command:
32 12 * * * /home/luilli/firstboot.sh
has permissions to run, change them with:
chmod 744 firstboot.sh
i tryed to run the bash file directly from the terminal , and it runs perfect.
