I have two scripts located in /home/luis, user that has admin rights. One is .sh and one is some ruby code that i'm trying to execute to generate a txt file in the same folder.
linux_users.rb
class User attr_reader :username, :home_directory def initialize(username, home) @username = username @home_directory = home end end unix_users = [] File.open('/etc/passwd').readlines.each do |line| split = line.split(':') unix_users << User.new(split[0], split[5]) end file = File.open("users.txt", "w") unix_users.each do |user| file.puts "#{user.username}:#{user.home_directory}" end file.close md5_validation.sh
#!/bin/bash /home/luis/.rbenv/shims/ruby /home/luis/linux_users.rb if [[ ! -f "/var/log/current_users.txt" ]] #If the file current_users doesn't exist --> Create it then echo "creating current_users.txt and user_changes.txt" touch /var/log/current_users.txt /var/log/user_changes.txt fi md5_users="$(md5sum "/home/luis/users.txt" | cut -d' ' -f1)" #Storing the md5 hash into a variable if [ -s /var/log/current_users.txt ] #If current_users.txt is not empty, then current_users_txt_hash=`cat /var/log/current_users.txt` #collect it's content. if [ "$md5_users" == "$current_users_txt_hash" ] #if the linux users hash match the old one, fine, then echo "No changes in the MD5 hash detected" else #otherwise store the new hash into current_users.txt echo "$md5_users" > "/var/log/current_users.txt" echo "A change occured in the MD5 hash" now=$(date +"%m_%d_%Y_%T") #creating a user_changes.txt file that logs the changing echo "$now changes occured" > "/var/log/user_changes.txt" fi else echo "Storing the MD5 hash into the filename.." #store the linux users hash into the current_users.txt (first script launch) echo "$md5_users" > "/var/log/current_users.txt" fi If i run from the terminal ./md5_validation.sh everything works fine and the ruby code is executed. But when i start the crontab with sudo systemctl start cron, after 1 minute only the ./md5_validation.sh bash code is executed and the line
/home/luis/.rbenv/shims/ruby /home/luis/linux_users.rb included the .sh file script is like ignored and it doesn't generate the txt file i need.
Command used to create the crontab:
sudo crontab -e Content of the crontab
*/1 * * * * /usr/bin/sh /home/luis/md5_validation.sh more useful info
➜ log whereis sh sh: /usr/bin/sh /usr/share/man/man1/sh.1.gz ➜ log whereis ruby ruby: /home/luis/.rbenv/shims/ruby 
