/usr/lib/jvm/java-26-openjdk-openj9/bin/jcmd

Usage : jcmd <vmid | display name | 0> <arguments>

   -J : supply arguments to the Java VM running jcmd
   -l : list JVM processes on the local machine
   -h : print this help message

   <vmid> : Attach API VM ID as shown in jcmd or other Attach API-based tools
   <display name> : this argument is used to match (either fully or partially) the display name as shown in jcmd or other Attach API-based tools
   <0> : the jcmd command will be sent to all Java processes detected by this utility

   arguments:
      help : print the list of diagnostic commands
      help <command> : print help for the specific command
      <command> [command arguments] : command from the list returned by "help"

list JVM processes on the local machine. Default behavior when no options are specified.

NOTE: this utility might significantly affect the performance of the target JVM.
    The available diagnostic commands are determined by
    the target VM and may vary between VMs.