ipcrm:tldr:682e8

The command "ipcrm --shmem-key ${shmem_key}" is used to remove a shared memory segment identified by the specified shared memory key.

Here is an explanation of each element in the command:

• "ipcrm": It is the command used to remove IPC (Inter-Process Communication) objects like shared memory, semaphores, and message queues.
• "--shmem-key": This option specifies that the shared memory segment should be removed.
• "${shmem_key}": It is a variable (represented here with ${}) that holds the shared memory key value. The actual key value will be substituted in place of ${shmem_key} when executing the command. The key is usually a unique identifier for a specific shared memory segment.

In summary, this command is used to remove a shared memory segment identified by the given shared memory key.