/usr/bin/env: ‘ruby’: No such file or directory

Question

When crontab tries to execute the script:

@reboot sh /home/username/unicorn_start.sh > /home/username/unicorn_start.out 2>&1

It creates me a log file with the following content: /usr/bin/env: ‘ruby’: No such file or directory.

This is what I have in unicorn_start.sh:

#!/bin/bash

PATH="$PATH:/usr/local/rvm/gems/ruby-1.9.2-p180/bin"

/etc/init.d/unicorn_myapp start

If I execute unicorn_myapp or unicorn_start.sh manually, everything works fine. As I understand, I need to add an additional path to $PATH variable. What is the way of doing it? Thanks ahead.

EDIT:

unicorn_init.sh:

#!/bin/sh
### BEGIN INIT INFO
# Provides:          unicorn
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Manage unicorn server
# Description:       Start, stop, restart unicorn server for a specific application.
### END INIT INFO
set -e

# Feel free to change any of the following variables for your app:
TIMEOUT=${TIMEOUT-60}
APP_ROOT=/home/username/appname
PID=$APP_ROOT/tmp/pids/unicorn.pid
CMD="cd $APP_ROOT; bundle exec unicorn -D -c $APP_ROOT/config/unicorn.rb -E production"
AS_USER=root
set -u

OLD_PIN="$PID.oldbin"

sig () {
  test -s "$PID" && kill -$1 `cat $PID`
}

oldsig () {
  test -s $OLD_PIN && kill -$1 `cat $OLD_PIN`
}

run () {
  if [ "$(id -un)" = "$AS_USER" ]; then
    eval $1
  else
    su -c "$1" - $AS_USER
  fi
}

case "$1" in
start)
  sig 0 && echo >&2 "Already running" && exit 0
  run "$CMD"
  ;;
stop)
  sig QUIT && exit 0
  echo >&2 "Not running"
  ;;
force-stop)
  sig TERM && exit 0
  echo >&2 "Not running"
  ;;
restart|reload)
  sig HUP && echo reloaded OK && exit 0
  echo >&2 "Couldn't reload, starting '$CMD' instead"
  run "$CMD"
  ;;
upgrade)
  if sig USR2 && sleep 2 && sig 0 && oldsig QUIT
  then
    n=$TIMEOUT
    while test -s $OLD_PIN && test $n -ge 0
    do
      printf '.' && sleep 1 && n=$(( $n - 1 ))
    done
    echo

    if test $n -lt 0 && test -s $OLD_PIN
    then
      echo >&2 "$OLD_PIN still exists after $TIMEOUT seconds"
      exit 1
    fi
    exit 0
  fi
  echo >&2 "Couldn't upgrade, starting '$CMD' instead"
  run "$CMD"
  ;;
reopen-logs)
  sig USR1
  ;;
*)
  echo >&2 "Usage: $0 <start|stop|restart|upgrade|force-stop|reopen-logs>"
  exit 1
  ;;
esac

Solution

The default PATH crontab is using is "only" /usr/bin:/bin, however you can adjust it.

Instead of writing the things in that script try adding it directly into the crontab command:

@reboot PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/rvm/gems/ruby-1.9.2-p180/bin"; /etc/init.d/unicorn_myapp start > /home/username/unicorn_start.out 2>&1

You can also add the path variable above every cronjob so it's applicable to every task you put in there:

 PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/rvm/gems/ruby-1.9.2-p180/bin"
 #
 #
 * * * * * myjob.sh
 @reboot /home/username/unicorn_start.sh > /home/username/unicorn_start.out 2>&1

Comments

[Melebius]

Do you want to start a daemon (assuming from /etc/init.d/)? You should start it as a service in such a case, not using cron. askubuntu.com/questions/19320/how-to-enable-or-disable-servi‌​ces

[Alex Zakruzhetskyi]

When I start it like service:sudo service unicorn_appname start, it gives me an error: /etc/init.d/unicorn_appname: 1: eval: bundle: not found

[Melebius]

You should show us the code in /etc/init.d/unicorn_myapp. The code you’ve posted till now does not contain any call to /usr/bin/env.

[Alex Zakruzhetskyi]

unicorn_myapp is a symlink to unicorn_init.sh that is located in the rails project in app/config If you need the content of unicorn_init.sh, I'll add it to the post.

[Alex Zakruzhetskyi]

Still, it gives me the same error: /usr/bin/env: ‘ruby’: No such file or directory

[Ziazis]

Which solution did you try?

[Alex Zakruzhetskyi]

The first one you wrote. EDIT: Tried the second solution, but the result didn't change.

[Ziazis]

Sounds more like an issue in your ruby script then cronjob issue. You can try the same with just a simple "echo $PATH" instead of your script and see what the PATH variable consists of or create a hello world ruby script and try piping that ouput into a file.

[Alex Zakruzhetskyi]

The output of echo $PATH: /root/bin:/root/.local/bin:/root/.rbenv/plugins/ruby-build/b‌​in:/root/.rbenv/shim‌​s:/root/.rbenv/bin:/‌​usr/local/rvm/gems/r‌​uby-1.9.2-p180/bin:/‌​usr/local/rvm/gems/r‌​uby-1.9.2-p180@globa‌​l/bin:/usr/local/rvm‌​/rubies/ruby-1.9.2-p‌​180/bin:/usr/local/s‌​bin:/usr/local/bin:/‌​usr/sbin:/usr/bin:/s‌​bin:/bin:/usr/games:‌​/usr/local/games:/us‌​r/local/rvm/gems/rub‌​y-1.9.2-p180/bin:/sn‌​ap/bin:/usr/local/rv‌​m/bin

[Ziazis]

I ment putting it into your crontab instead of your unicorn script. So e.g. @reboot echo $PATH > /tmp/crontab.path reboot and see what you actually have as a PATH during the reboot. If you used the second one it should be the path that was set.

[Alex Zakruzhetskyi]

It gives me: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin‌​:/usr/local/rvm/gems‌​/ruby-1.9.2-p180/bin

[Ziazis]

Let us continue this discussion in chat.