iotop error on a Plesk server: command not found

Symptoms

• Several actions in Plesk fail with the following error:

  Stdout:
  Stderr: /opt/psa/admin/sbin/modules//repair-kit/io.sh: line 6: iotop: command not found
  Exit code: 127

Cause

iotop package is not installed.

Resolution

1. Connect to the server via SSH

2. Install the iotop package:

   • For Debian-based systems (Debian, Ubuntu):

     # apt install iotop

   • For RHEL-based systems (RHEL, CentOS, Almalinux, Rocky Linux, CloudLinux):

     # yum install iotop

3. Retry the previous action.