| FreeBSD | GNU/Linux | 
|---|
BSD , . Zstd , , syslog- . - , libxo, . .
  | GNU , , copyright holder-, . Linux , Hurd FreeBSD. (?) , , , , . GNU . Linux.
  - , , . , / , . : , .
  - distribution maintainer-, , - , . maintainer- ( , , , , ..) .
  , Ubuntu, , GRUB , IPv6, . MTU Ubuntu (!?). .
  GNU/Linux, GNOME, NetworkManager - , . netcat IPv6 ( telnet, socat), .
  | 
BSD . - , . EXPERIMENTAL .
  | Linux - , , , , , , . btrfs production ready, ( Facebook β ), .
  - . POSIX file locks, , Linux.
  | 
, . , fstat, gstat, ifmcstat, iostat, ipfstat, kldstat, lockstat, netstat, nfsstat, plockstat, pmcstat, procstat, pstat, sockstat, vmstat . - ? acpiconf, atmconfig, bsdconfig, ifconfig, kldconfig, mdconfig, pciconf, usbconfig, sysctl, sysrc. , , .
  Framework : rc , ifconfig .
  FreeBSD firewall-: ipf, ipfw, pf β /, firewall-. ipfw IPv4, IPv6, TCP/UDP/SCTP, ICMP*, Ethernet, traffic shaper/scheduler, NAT, NAT64, NPTv6, IPsec, stateless/stateful firewall .
  , , sysctl.
  | IP , ifconfig ip. , route ip. TUN/TAP , tunctl ip. bridge , brctl ip. bond, ifenslave ip. IPsec SA, setkey ip. iwconfig, ip. , iptunnel, ip. MAC, nameif, ip.
  ip , ? STP bridge brctl, . , , . FreeBSD ifconfig.
  Framework- : shell-based Debian, NetworkManager, systemd . - .
  iptables, ipchains? Ethernet ebtables, IPv6 ip6tables, ARP arptables. , , iptables β , / ufw.
  ? . deprecated nftables. deprecated bpfilter . firewalld.
  sysctl /sys, .
  fdisk, parted, gdisk, sfdisk, gparted. MBR/GPT , , / , 100%/full? . FreeBSD gpart , , , , / .
  | 
12+ ZFS .
  | ZFS-on-Linux, , production-ready, . ARC Linux-, , , , . Linux ARC- RAM/2 β . TRIM , ZFS SSD.
  | 
man- , , , FreeBSD Handbook. , Unix, . ? man intro, intro . OpenBSD man-, handbook-, .
  | GNU/Linux , , . ( !) β stackexchange.com -. , . , , .
  | 
/ GNU/Linux ( /, ), β WhatsApp, 2M+ TCP . 60% ( ) Netflix, FreeBSD. β , FreeBSD. - Quake3-for-Linux FreeBSD 10-15% FPS.
  | GNU/Linux - , , .
  | 
.
  | , / OOM killer - («», ) SSH . user-space - : earlyoom, oomd, low-memory-monitor, nohang.
  | 
. β , - β . : , CUPS - GIMP?
  | , , - : - . β . : vim-full vim-minimal, , maintainer-.
  | 
, . , , GNU/Linux .
  | , , desktop- .
  | 
IPsec ESP , TFC, ESN β 10Gbps+ . Security Policies .
  | ESPv3 ESN TFC , , strongSwan, identities Security Policies. .
  |