The CentOS Project is a community-driven free software effort focused on delivering a robust open source ecosystem. For users, CentOS offers a consistent manageable platform that suits a wide variety of deployments. For open source communities, CentOS offers a solid, predictable base to build upon, along with extensive resources to build, test, release, and maintain their code.
1. Find Out Installed Package
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[john@linux1 /]$ rpm -qa |less
plymouth-0.8.9-0.24.20140113.el7.centos.x86_64 libsoup-2.48.1-3.el7.x86_64 libaio-0.3.109-13.el7.x86_64 dmidecode-2.12-9.el7.x86_64 passwd-0.79-4.el7.x86_64 bind-libs-lite-9.9.4-29.el7_2.2.x86_64 sed-4.2.2-5.el7.x86_64 grub2-2.02-0.34.el7.centos.x86_64 libcom_err-1.42.9-7.el7.x86_64 rsyslog-7.4.7-12.el7.x86_64 biosdevname-0.6.2-1.el7.x86_64 dracut-config-rescue-033-360.el7_2.x86_64 libacl-2.2.51-12.el7.x86_64 openssh-clients-6.6.1p1-23.el7_2.x86_64 xe-guest-utilities-6.5.0-1432.x86_64 libgcrypt-1.5.3-12.el7_1.1.x86_64 libpcap-1.5.3-8.el7.x86_64 cronie-1.4.11-14.el7.x86_64 iwl6050-firmware-41.28.5.1-43.el7.noarch iwl4965-firmware-228.61.2.24-43.el7.noarch iwl3160-firmware-22.0.7.0-43.el7.noarch libunistring-0.9.3-9.el7.x86_64 iwl100-firmware-39.31.5.1-43.el7.noarch perl-parent-0.225-244.el7.noarch newt-0.52.15-4.el7.x86_64 perl-Pod-Escapes-1.04-286.el7.noarch gdbm-1.10-8.el7.x86_64 perl-libs-5.16.3-286.el7.x86_64 ……. [john@linux1 /]$ rpm -qa |grep syslog rsyslog-7.4.7-12.el7.x86_64 |
2. Network Interface Configuration
DHCP or Static:
Step 1 » Check the network interface name by typing below command
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[root@linux1 ~]# 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 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 9a:4a:27:66:a4:4c brd ff:ff:ff:ff:ff:ff inet 10.9.1.26/24 brd 10.91.128.255 scope global eth0 valid_lft forever preferred_lft forever inet6 fe80::984a:27ff:fe66:a44c/64 scope link valid_lft forever preferred_lft forever |
Here “lo” is the loopback interface and “eth0” is the network interface that you need to configure .
Step 2 » you can see the file named ifcfg-eth0 ( Interface name ) in the location “/etc/sysconfig/network-scripts/” , open the file and you can see the lines as below, which is static ip 10.9.1.26 assigned to interface eth0
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DEVICE=”eth0″
HWADDR=”00:22:19:09:4D:3C” NM_CONTROLLED=”yes” ONBOOT=”yes” # Interface enabled BOOTPROTO=”dhcp” #Assigning IP from DHCP |
Step 3 » Start the network service and you can see the status as below .
[root@linux1~]# service network start
Bringing up loopback interface: [ OK ]
Bringing up interface p4p1:
Determining IP information for p4p1... done. [ OK ]
3. To be continued
Reference: