How to increase the limit of the mmap counts

Increase the limit of the mmap counts for Elasticsearch service. ...

How to disable IPv6 on Raspberry Pi 4

Disable IPv6 on Raspberry Pi 4. ...

How to increase maximum socket receive buffer size

Graylog will generate a warning to inform you that socket receive buffer size (SO_RCVBUF) should be increased. ...

How to create persistent sysctl configuration

Create persistent sysctl configuration using standard system utilities. ...

How to drop kernel caches

Free dirty objects, page cache and reclaimable slab objects for troubleshooting or instructional purposes. ...

Debian – How to quickly disable IPv6

I am playing with Linux Virtual Servers in the Linode Cloud for the last several days and a couple of times wanted to disable IPv6 for testing purposes. ...