bash: /proc/sys/vm/drop_caches: Permission denied

[alikhan825]

when i execute this command
sync; echo 1 > /proc/sys/vm/drop_caches
its shows this error "bash: /proc/sys/vm/drop_caches: Permission denied".
why it's show permission denied i'm accessing root account.

 

[dalem]

Is this a virtual server running as a container? IE: OpenVZ

 

[cPanelLauren]

@dalem's suggestion here makes sense, if it's a VZ server this would explain why root doesn't have permission to make this change.