Execute any command/script at system startup in Ubuntu 18.04 (LTS)

Today, after installing Ubuntu 18.04 after a long use of lower version of Ubuntu, I got there is no rc.local file in etc directory. Actually this file is used to start any script at system startup.

So, what to do if it is not available in Ubuntu 18.04?

Just create a file by typing any of given command -

sudo nano /etc/rc.local

or

sudo gedit /etc/rc.local

or

sudo cat /etc/rc.local


and paste the following text in this file -


#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

exit 0



After saving this, make it executable by command -

chmod +x /etc/rc.local


Now you can paste your scripting script in this file.

Automatic startup of Apache Tomcat server in ubuntu on system startup

Apache tomcat server is used to run JSP/Servlet applications. When we install tomcat in Ubuntu/Linux it does not start automatically on system startup. We have to start it manually after system startup. In windows machine it is very simple to start Tomcat on system startup. We can just configure the tomcat service to automatic and it starts on system startup, But when we use tomcat in Ubuntu/Linux, it becomes sometime complex to start tomcat in system startup.

Some people suggest write to shell script to start tomcat, writing shell script is again complex. I have applied many methods to start tomcat in Ubuntu automatically, but I found this method is very simple to start Tomcat in Ubuntu.

Go to rc.local file in etc in root folder and open it with root privileges. Write the startup.sh path in this file and save.

sleep 10

/home/arvind/apache-tomcat-8.0.32/bin/startup.sh