Cron Script to run every 5 minutes

Question

How would you use a cron deamon to execute a scheduled command such as gathering memory usage and adding that information to a file called /tmp/memory.usage, but only runs on Monday through Thursday every five minutes? I need to show the date and time before each new entry within the file. Please assist. Thank you in advance for any suggestions and help!

Answer 1

• crontab -e
• add at the end */5 * * * 1-4 /path/to/script &
• save and exit

• the script is

  #!/bin/bash
  echo "$(date)" >> /tmp/memory.usage
  echo "$(free)" >> /tmp/memory.usage
  echo ""
  

see man 5 crontab for details. Or, an all-in-one cron line:

*/5 * * * 1-4 (echo $(date) && echo $(free) && echo "") >> /tmp/memory.usage

Answer 2

*/5 * * * * /path/to/script

Make the script executable before that. And make it accessible only for root if the script need elevated privileges.

You can follow the link for more examples Here