Linux-如何更改目录并在启动时使用rc.local运行命令

Question

I am running ubunto on a box in ec2. I would like to execute the following command in a specific directory each time the machine starts up:

celery -A someapp.tasks --concurrency=1 --loglevel=info worker > output.log 2> errors.log

I've run

sudo nano /etc/rc.local

and edited the file to read

#!/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.
(
    cd /home/ubuntu/somefolder/
    sh -e -c 'celery -A someapp.tasks worker -Ofair --loglevel=info > output.log > errors.log'
)
exit 0

But when the server starts up the command doesnt run. If I cd directly into /home/ubunto/somefolder and run the celery command the operation starts as expected. How can I run this command each time the machine starts up?

Answer 1

Try it like this, using a subshell, so you don't change rc.local 's working dir:

(
  cd /home/ubuntu/somefolder 
  celery -A someapp.tasks --concurrency=1 --loglevel=info worker >output.log 2> errors.log
)
exit 0

Answer 2

You can simply use the following:

sudo vi /etc/crontab

Add this at the end:

@reboot  cd /home/ubuntu/somefolder/ && sh -e -c 'celery -A someapp.tasks worker -Ofair --loglevel=info > output.log > errors.log'

Cheers.

Answer 3

我会尝试这个：

cd /home/ubuntu/somefolder && celery -A someapp.tasks --concurrency=1 --loglevel=info worker >output.log 2> errors.log