I did not use ip/ss commands in default centos7 container.
So, I install iproute package to container.
Command list
- install iproute
# yum install iproute
Detail
[root@519dd98187dd /]# yum install iproute Loaded plugins: fastestmirror, ovl base | 3.6 kB 00:00:00 epel/x86_64/metalink | 6.4 kB 00:00:00 epel | 4.3 kB 00:00:00 extras | 3.4 kB 00:00:00 ius | 2.3 kB 00:00:00 updates | 3.4 kB 00:00:00 (1/3): epel/x86_64/updateinfo | 734 kB 00:00:01 (2/3): ius/x86_64/primary_db | 195 kB 00:00:01 (3/3): epel/x86_64/primary_db | 4.5 MB 00:00:03 Loading mirror speeds from cached hostfile * base: www.ftp.ne.jp * epel: ftp.riken.jp * extras: www.ftp.ne.jp * ius: mirrors.kernel.org * updates: www.ftp.ne.jp Resolving Dependencies --> Running transaction check ---> Package iproute.x86_64 0:3.10.0-74.el7 will be installed --> Processing Dependency: libmnl.so.0(LIBMNL_1.0)(64bit) for package: iproute-3.10.0-74.el7.x86_64 --> Processing Dependency: libxtables.so.10()(64bit) for package: iproute-3.10.0-74.el7.x86_64 --> Processing Dependency: libmnl.so.0()(64bit) for package: iproute-3.10.0-74.el7.x86_64 --> Running transaction check ---> Package iptables.x86_64 0:1.4.21-17.el7 will be installed --> Processing Dependency: libnfnetlink.so.0()(64bit) for package: iptables-1.4.21-17.el7.x86_64 --> Processing Dependency: libnetfilter_conntrack.so.3()(64bit) for package: iptables-1.4.21-17.el7.x86_64 ---> Package libmnl.x86_64 0:1.0.3-7.el7 will be installed --> Running transaction check ---> Package libnetfilter_conntrack.x86_64 0:1.0.4-2.el7 will be installed ---> Package libnfnetlink.x86_64 0:1.0.1-4.el7 will be installed --> Finished Dependency Resolution Dependencies Resolved ========================================================================================================================================== Package Arch Version Repository Size ========================================================================================================================================== Installing: iproute x86_64 3.10.0-74.el7 base 618 k Installing for dependencies: iptables x86_64 1.4.21-17.el7 base 426 k libmnl x86_64 1.0.3-7.el7 base 23 k libnetfilter_conntrack x86_64 1.0.4-2.el7 base 53 k libnfnetlink x86_64 1.0.1-4.el7 base 26 k Transaction Summary ========================================================================================================================================== Install 1 Package (+4 Dependent packages) Total download size: 1.1 M Installed size: 3.1 M Is this ok [y/d/N]: y Downloading packages: (1/5): libmnl-1.0.3-7.el7.x86_64.rpm | 23 kB 00:00:00 (2/5): iptables-1.4.21-17.el7.x86_64.rpm | 426 kB 00:00:00 (3/5): libnetfilter_conntrack-1.0.4-2.el7.x86_64.rpm | 53 kB 00:00:00 (4/5): libnfnetlink-1.0.1-4.el7.x86_64.rpm | 26 kB 00:00:00 (5/5): iproute-3.10.0-74.el7.x86_64.rpm | 618 kB 00:00:00 ------------------------------------------------------------------------------------------------------------------------------------------ Total 1.6 MB/s | 1.1 MB 00:00:00 Running transaction check Running transaction test Transaction test succeeded Running transaction Installing : libmnl-1.0.3-7.el7.x86_64 1/5 Installing : libnfnetlink-1.0.1-4.el7.x86_64 2/5 Installing : libnetfilter_conntrack-1.0.4-2.el7.x86_64 3/5 Installing : iptables-1.4.21-17.el7.x86_64 4/5 Installing : iproute-3.10.0-74.el7.x86_64 5/5 Verifying : libnetfilter_conntrack-1.0.4-2.el7.x86_64 1/5 Verifying : libnfnetlink-1.0.1-4.el7.x86_64 2/5 Verifying : iptables-1.4.21-17.el7.x86_64 3/5 Verifying : libmnl-1.0.3-7.el7.x86_64 4/5 Verifying : iproute-3.10.0-74.el7.x86_64 5/5 Installed: iproute.x86_64 0:3.10.0-74.el7 Dependency Installed: iptables.x86_64 0:1.4.21-17.el7 libmnl.x86_64 0:1.0.3-7.el7 libnetfilter_conntrack.x86_64 0:1.0.4-2.el7 libnfnetlink.x86_64 0:1.0.1-4.el7 Complete! [root@519dd98187dd /]#
[root@519dd98187dd /]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 14: eth0@if15: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP link/ether 02:42:ac:11:00:02 brd ff:ff:ff:ff:ff:ff link-netnsid 0 inet 172.17.0.2/16 scope global eth0 valid_lft forever preferred_lft forever inet6 fe80::42:acff:fe11:2/64 scope link valid_lft forever preferred_lft forever [root@519dd98187dd /]# ss -t State Recv-Q Send-Q Local Address:Port Peer Address:Port [root@519dd98187dd /]# ss -ta State Recv-Q Send-Q Local Address:Port Peer Address:Port LISTEN 0 128 127.0.0.1:ddi-tcp-1 *:* LISTEN 0 128 ::1:ddi-tcp-1 :::* [root@519dd98187dd /]# ss -tan State Recv-Q Send-Q Local Address:Port Peer Address:Port LISTEN 0 128 127.0.0.1:8888 *:* LISTEN 0 128 ::1:8888 :::* [root@519dd98187dd /]#