Linux上的10个Netstat命令示例
Netstat是一个命令行实用程序，可用于以与网络连接，路由表，接口记录，伪装连接，多播成员身份等类似的方法列出所有网络（套接字）连接。本文介绍有关–Top10Netstat命令Linux上的示例。
监听和非监听套接字
要显示有关侦听和非侦听套接字的信息，请使用以下命令–
$ netstat -all
样本输出应如下所示–
Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 localhost:mysql *:* LISTEN tcp 0 0 linux-Inspiron-3:domain *:* LISTEN tcp 0 0 linux-Inspiron-35:46930 ec2-54-236-207-15:https ESTABLISHED tcp 0 0 linux-Inspiron-35:59820 maa03s22-in-f14.1:https ESTABLISHED tcp 0 0 linux-Inspiron-35:46662 sc-in-f188.1e100.n:5228 ESTABLISHED tcp 0 0 linux-Inspiron-35:41914 bom05s08-in-f4.1e:https ESTABLISHED tcp 0 0 linux-Inspiron-35:59760 maa03s22-in-f14.1:https ESTABLISHED tcp 0 0 linux-Inspiron-35:33172 ec2-54-221-62-191:https ESTABLISHED tcp 0 0 linux-Inspiron-35:43466 ec2-34-192-133-18:https ESTABLISHED tcp 0 0 linux-Inspiron-35:43480 a104-81-21-73.depl:http TIME_WAIT tcp 0 0 linux-Inspiron-35:36270 maa03s20-in-f14.1:https ESTABLISHED tcp 0 0 linux-Inspiron-35:53360 maa03s20-in-f3.1e1:http ESTABLISHED ........................................................................................
PID和程序名称
要显示每个套接字所属的程序的PID和名称，请使用以下命令-
$ netstat --program
样本输出应如下所示–
Active Internet connections (w/o servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 linux-Inspiron-35:46930 ec2-54-236-207-15:https ESTABLISHED 23074/chrome tcp 0 0 linux-Inspiron-35:59820 maa03s22-in-f14.1:https ESTABLISHED 23235/chromium-brow tcp 0 0 linux-Inspiron-35:46662 sc-in-f188.1e100.n:5228 ESTABLISHED 23074/chrome tcp 0 0 linux-Inspiron-35:41914 bom05s08-in-f4.1e:https ESTABLISHED 23074/chrome tcp 1 0 linux-Inspiron-35:60770 117.18.237.42:http CLOSE_WAIT 23074/chrome tcp 0 0 linux-Inspiron-35:43466 ec2-34-192-133-18:https ESTABLISHED 23074/chrome ............................................................................................
TCP端口信息
要获取TCP端口信息，请使用以下命令–
$ netstat --tcp
样本输出应如下所示–
Active Internet connections (w/o servers) Proto Recv-Q Send-Q L ocal Address Foreign Address State tcp 0 0 linux-Inspiron-35:36310 maa03s20-in-f14.1:https ESTABLISHED tcp 0 0 linux-Inspiron-35:46930 ec2-54-236-207-15:https ESTABLISHED tcp 0 0 linux-Inspiron-35:46662 sc-in-f188.1e100.n:5228 ESTABLISHED tcp 0 0 linux-Inspiron-35:36320 maa03s20-in-f14.1:https ESTABLISHED tcp 0 0 linux-Inspiron-35:33216 ec2-54-221-62-191:https ESTABLISHED tcp 0 0 linux-Inspiron-35:46478 arn02s05-in-f3.1e:https ESTABLISHED tcp 0 0 linux-Inspiron-35:43466 ec2-34-192-133-18:https ESTABLISHED tcp 0 0 linux-Inspiron-35:60794 117.18.237.42:http ESTABLISHED tcp 0 0 linux-Inspiron-35:48080 104.244.42.136:https ESTABLISHED tcp 0 0 linux-Inspiron-35:58048 ip-166-62-112-150.:http ESTABLISHED tcp 0 0 linux-Inspiron-35:33272 bom05s08-in-f163.:https ESTABLISHED
UDP端口信息
要获取UDP端口信息，请使用以下命令–
$ netstat --udp
样本输出应如下所示–
Active Internet connections (w/o servers) Proto Recv-Q Send-Q Local Address Foreign Address State udp 0 0 linux-Inspiron-35:46539 maa03s20-in-f5.1e:https ESTABLISHED udp 768 0 localhost:46996 linux-Inspiron-3:domain ESTABLISHED
linux端口列表
要获取linux端口列表，请使用以下命令-
$ netstat -lx
样本输出应如下所示–
Active UNIX domain sockets (only servers) Proto RefCnt Flags Type State I-Node Path unix 2 [ ACC ] STREAM LISTENING 27810 @/tmp/.ICE-unix/2345 unix 2 [ ACC ] STREAM LISTENING 26776 @/tmp/ibus/dbus-RkYlcXlm unix 2 [ ACC ] STREAM LISTENING 20175 /var/run/mysqld/mysqld.sock unix 2 [ ACC ] STREAM LISTENING 25423 /run/user/1000/systemd/private unix 2 [ ACC ] STREAM LISTENING 24848 /run/user/126/systemd/private unix 2 [ ACC ] SEQPACKET LISTENING 1784 /run/udev/control unix 2 [ ACC ] STREAM LISTENING 25933 /run/user/1000/keyring/control unix 2 [ ACC ] STREAM LISTENING 22555 /var/run/NetworkManager/private-dhcp unix 2 [ ACC ] STREAM LISTENING 24475 /run/user/1000/keyring/pkcs11 unix 2 [ ACC ] STREAM LISTENING 24477 /run/user/1000/keyring/ssh unix 2 [ ACC ] STREAM LISTENING 112357 /tmp/.com.google.Chrome.3r7jSQ/SingletonSocket
显示路由表
要显示路由表，请使用以下命令–
$ netstat -r
样本输出应如下所示–
Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface default nhooo1 0.0.0.0 UG 0 0 0 enp7s0 default 192.168.1.254 0.0.0.0 UG 0 0 0 wlp6s0 link-local * 255.255.0.0 U 0 0 0 enp7s0 192.168.1.0 * 255.255.255.0 U 0 0 0 enp7s0 192.168.1.0 * 255.255.255.0 U 0 0 0 wlp6s0
显示网络统计
要显示网络统计信息，请使用以下命令–
$ netstat -s
样本输出应如下所示–
Ip:
226777 total packets received
99 with invalid addresses
0 forwarded
0 incoming packets discarded
213036 incoming packets delivered
126141 requests sent out
48 outgoing packets dropped
Icmp:
420 ICMP messages received
120 input ICMP message failed.
ICMP input histogram:
destination unreachable: 414
echo requests: 6
576 ICMP messages sent
0 ICMP messages failed
ICMP output histogram:
destination unreachable: 570
echo replies: 6
IcmpMsg:
InType3: 414
InType8: 6
OutType0: 6
OutType3: 570
....................................................................................非支持地址族
要查找不支持的地址系列，请使用以下命令–
$ netstat -v
样本输出应如下所示–
Active Internet connections (w/o servers) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 linux-Inspiron-35:46930 ec2-54-236-207-15:https ESTABLISHED tcp 0 0 linux-Inspiron-35:39418 arn09s10-in-f14.1:https ESTABLISHED tcp 0 0 linux-Inspiron-35:36398 maa03s20-in-f14.1:https ESTABLISHED tcp 0 0 linux-Inspiron-35:59950 maa03s22-in-f14.1:https ESTABLISHED tcp 0 0 linux-Inspiron-35:60888 117.18.237.42:http ESTABLISHED tcp 0 0 linux-Inspiron-35:55716 maa03s20-in-f3.1e:https TIME_WAIT tcp 0 0 linux-Inspiron-35:42044 bom05s08-in-f4.1e:https ESTABLISHED tcp 0 0 linux-Inspiron-35:49654 ec2-54-221-3-35.c:https ESTABLISHED tcp 0 0 linux-Inspiron-35:47238 sc-in-f188.1e100.n:5228 ESTABLISHED tcp 0 0 linux-Inspiron-35:42046 bom05s08-in-f4.1e:https ESTABLISHED ...........................................................................................
网络信息
要显示有关网络的其他/更多信息，请使用以下命令–
Active Internet connections (w/o servers) Proto Recv-Q Send-Q Local Address Foreign Address State User Inode tcp 0 0 linux-Inspiron-35:46930 ec2-54-236-207-15:https ESTABLISHED linux 123811 tcp 0 0 linux-Inspiron-35:55458 52.222.136.134:https ESTABLISHED linux 148067 tcp 0 0 linux-Inspiron-35:43780 sb-in-f188.1e100.n:5228 ESTABLISHED linux 147150 tcp 0 0 linux-Inspiron-35:60924 117.18.237.42:http ESTAB LISHED linux 148291 tcp 0 0 linux-Inspiron-35:36446 maa03s20-in-f14.1:https ESTABLISHED linux 148068 tcp 0 0 linux-Inspiron-35:51126 edge-star-mini-sh:https ESTABLISHED linux 149411 tcp 0 0 linux-Inspiron-35:33338 ec2-54-221-62-191:https CLOSE_WAIT linux 146371 udp 0 0 linux-Inspiron-35:46539 maa03s20-in-f5.1e:https ESTABLISHED linux 117623 udp 768 0 localhost:46996 linux-Inspiron-3:domain ESTABLISHED linux 123551 ..................................................................................
Netstat帮助
要获得netstat的帮助，请使用以下命令-
$ netstat -h
样本输出应如下所示–
usage: netstat [-vWeenNcCF] [] -r netstat {-V|--version|-h|--help}
netstat [-vWnNcaeol] [ ...]
netstat { [-vWeenNac] -i | [-cWnNe] -M | -s }
-r, --route display routing table
-i, --interfaces display interface table
-g, --groups display multicast group memberships
-s, --statistics display networking statistics (like SNMP)
-M, --masquerade display masqueraded connections
-v, --verbose be verbose
-W, --wide don't truncate IP addresses
-n, --numeric don't resolve names
--numeric-hosts don't resolve host names
--numeric-ports don't resolve port names
--numeric-users don't resolve user names
-N, --symbolic resolve hardware names
-e, --extend display other/more information
-p, --programs display PID/Program name for sockets
-c, --continuous c ontinuous listing
-l, --listening display listening server sockets
-a, --all, --listening display all sockets (default: connected)
-o, --timers display timers
-F, --fib display Forwarding Information Base (default)
-C, --cache display routing cache instead of FIB
={-t|--tcp} {-u|--udp} {-w|--raw} {-x|--unix} --ax25 --ipx --netrom
=Use '-6|-4' or '-A ' or '--'; default: inet
List of possible address families (which support routing):
inet (DARPA Internet) inet6 (IPv6) ax25 (AMPR AX.25)
netrom (AMPR NET/ROM) ipx (Novell IPX) ddp (Appletalk DDP)
x25 (CCITT X.25)在以上文章中，我们了解了–Linux上的Top10Netstat命令示例。在我们的下一篇文章中，我们将提出更多基于Linux的技巧。继续阅读！