A grinch may be snatching away some year-end holiday time, forcing Linux system administrators to fill a gaping security hole in their systems. Named after the proverbially grumpy Dr. Seuss character, the grinch vulnerability could affect all Linux systems, potentially providing attackers with unfettered root access, according to security service
The netstat command no longer exists in default installation of CentOS / RHEL 7. It is now replaced with ss command. The ss command is used to show socket statistics. It can display stats for PACKET sockets, TCP sockets, UDP sockets, DCCP sockets, RAW sockets, Unix domain sockets, and more.