iptables-extensions (man8)
iptables-extensions — list of extensions in the standard iptables distribution
gnu-linux
iptables-extensions — list of extensions in the standard iptables distribution
vgs − Display information about volume groups
semodule_unpackage − Extract policy module and file context file from an SELinux policy module package.
runlevel − Print previous and current SysV runlevel
devlink − Devlink tool
ip-l2tp – L2TPv3 static unmanaged tunnel configuration
pam_timestamp_check − Check to see if the default timestamp is valid
mkntfs − create an NTFS file system
rpcdebug − set and clear NFS and RPC kernel debug flags
isadump − examine ISA registers