How to run a shell script at startup

Question

On an Amazon S3 Linux instance, I have two scripts called start_my_app and stop_my_app which start and stop forever (which in turn runs my

Answer 1

In the file you put in /etc/init.d/ you have to set it executable with:

chmod +x /etc/init.d/start_my_app

Thanks to @meetamit, if this does not run you have to create a symlink to /etc/rc.d/

ln -s /etc/init.d/start_my_app /etc/rc.d/

Please note that on latest Debian, this will not work as your script have to be LSB compliant (provide, at least, the following actions: start, stop, restart, force-reload, and status): https://wiki.debian.org/LSBInitScripts

As a note, you should put the absolute path of your script instead of a relative one, it may solves unexpected issues:

/var/myscripts/start_my_app

And don't forget to add on top of that file:

#!/bin/sh

Answer 2

Working with Python 3 microservices or shell; using Ubuntu Server 18.04 (Bionic Beaver) or Ubuntu 19.10 (Eoan Ermine) or Ubuntu 18.10 (Cosmic Cuttlefish) I always do like these steps, and it worked always too:

1. Creating a microservice called p example "brain_microservice1.service" in my case:

   $ nano /lib/systemd/system/brain_microservice1.service
   

2. Inside this new service that you are in:

   [Unit]
   Description=brain_microservice_1
   After=multi-user.target
   
   [Service]
   Type=simple
   ExecStart=/usr/bin/python3.7 /root/scriptsPython/RUN_SERVICES/microservices    /microservice_1.py -k start -DFOREGROUND
   ExecStop=/usr/bin/python3.7 /root/scriptsPython/RUN_SERVICES/microservices/microservice_1.py -k graceful-stop
   ExecReload=/usr/bin/python3.7 /root/scriptsPython/RUN_SERVICES/microservices/microservice_1.py -k graceful
   PrivateTmp=true
   LimitNOFILE=infinity
   KillMode=mixed
   Restart=on-failure
   RestartSec=5s
   
   [Install]
   WantedBy=multi-user.target
   

3. Give the permissions:

   $ chmod -X /lib/systemd/system/brain_microservice*
   $ chmod -R 775 /lib/systemd/system/brain_microservice*
   

4. Give the execution permission then:

   $ systemctl daemon-reload
   

5. Enable then, this will make then always start on startup

   $ systemctl enable brain_microservice1.service
   

6. Then you can test it;

   $ sudo reboot now

7. Finish = SUCCESS!!

This can be done with the same body script to run shell, react ... database startup script ... any kind os code ... hope this help u...

...

Answer 3

Another option is to have an @reboot command in your crontab.

Not every version of cron supports this, but if your instance is based on the Amazon Linux AMI then it will work.

Answer 4

This is the way I do it on Red Hat Linux systems.

Put your script in /etc/init.d, owned by root and executable. At the top of the script, you can give a directive for chkconfig. Example, the following script is used to start a Java application as user oracle.

The name of the script is /etc/init.d/apex

#!/bin/bash
# chkconfig: 345 99 10
# Description: auto start apex listener
#
case "$1" in
 'start')
   su - oracle -c "cd /opt/apex ; java -jar apex.war > logs/apex.log 2>logs/apex_error.log &";;
 'stop')
   echo "put something to shutdown or kill the process here";;
esac

This says that the script must run at levels 3, 4, and 5, and the priority for start/stop is 99 and 10.

Then, as user root you can use chkconfig to enable or disable the script at startup:

chkconfig --list apex
chkconfig --add apex

And you can use service start/stop apex.

Answer 5

Edit the rc.local file using nano or gedit editor and add your scripts in it. File path could be /etc/rc.local or /etc/rc.d/rc.local.

sudo nano /etc/rc.local

This is the edit:

#!/bin/sh
/path-to-your-script/your-scipt-name.sh

once done press ctrl+o to update, pressEnter then ctrl+x.

Make the file executable.

sudo chmod 755 /etc/rc.local

Then initiate the rc-local service to run script during boot.

sudo systemctl start rc-local

Answer 6

Here is a simpler method!

First: write a shell script and save it a .sh here is an example

#!/bin/bash
Icoff='/home/akbar/keyboardONOFF/icon/Dt6hQ.png'
id=13
fconfig=".keyboard"
echo "disabled" > $fconfig
xinput float $id
notify-send -i $Icoff "Internal Keyboard disabled";

this script will disable the internal keyboard at startup.

Second: Open the application " Startup Application Preferences"

enter image description here

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Third: click Add. fourth: in the NAME section give a name. fifth: In the command section browse to your .sh . sixth: edit your command section to:

bash <space> path/to/file/<filename>.sh <space> --start

seventh: click Add. Thats it! Finished!

Now confirm by rebooting your pc.

cheers!