Getting Service status and automatic mounting of external drives

Question

I have following bash script, I wanted to add few more things to it: (This script runs from root cronjob every 6 hours). Device is Raspberry Pi running raspberian.

#!/bin/bash
# Script: temp_email.sh
# -------------------------------------------------------

cpu=$(</sys/class/thermal/thermal_zone0/temp)
echo "$(date) @ $(hostname)"
echo "-------------------------------------------"
echo "GPU => $(/opt/vc/bin/vcgencmd measure_temp)"
echo "CPU => $((cpu/1000))'C"
echo "-------------------------------------------"
echo ""
echo ""

Following is the functionality I'd like to add to this:

I wanted to get current (at the time the script executes) status of apache2 web service. I have tried "service apache2 status" but the output is too long. I would like to get a simple running / stopped in case of the service status.

I would like get status of 2 drives which are mounted under /mount_folder/ . I have tried mount -l but again the information is too much. How do I get only the output for /dev/sd* devices?

Finally I would like for this script to start apache service if it is stopped and mount the devices under /dev/sd* to their respective mount point.

Could someone kindly guide me to it.

Answer 1

For the current state of apache2 you can use:

rpi ~$ systemctl list-units --no-legend apache2.service | cut -d' ' -f4
running
rpi ~$

For the mount status of '/dev/sd*' you can use (example):

rpi ~$ lsblk -dlno NAME,MOUNTPOINT /dev/sd??*
/dev/sda1 /boot
/dev/sda2
/dev/sda5
/dev/sdb1 /mnt/disk
rpi ~$

To start apache service you can use:

rpi ~$ sudo systemctl start apache2.service

This will do nothing if the service is already started. For mounting the block devices you use the normal mount command, e.g.:

rpi ~$ sudo mount /dev/sdb1 /mount_folder/sdb1
rpi ~$ sudo mount /dev/sdb2 /mount_folder/sdb2