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Editor to share with you the CentOS7.0 command to update the new version of the sample analysis, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

View system version information

# uname-a

# cat / etc/redhat-release

Upgrade all packages, change software settings and system settings, upgrade the system version kernel

# yum-y update

Upgrade all packages without changing software and system settings, system version upgrade, kernel unchanged

# yum-y upgrade

The configuration file of the hostname in CentOS7 has been changed and is no longer / etc/sysconfig/network before the change / etc/hostname will take effect.

# vi / etc/hostname

In addition to modifying / etc/resolv.conf, DNS can also set / etc/sysconfig/network-scripts/ifcfg-eno16777728 directly in the network card, so that when the network service is restarted, the configuration in / etc/resolv.conf is generated.

View log files

# tail-f / var/log/messages

Mount, take DHCP as an example

# mkdir / mnt/cdrom

# mount / dev/cdrom / mnt/cdrom

# cd / mnt/cdrom/Packages

# ls dhcp* View the installation package of DHCP

# rpm-Uvh installation package

# rpm-qc dhcp

Changes in commands

Systemctl is the command of the system service manager, which combines the commands service and chkconfig

Open the Linux port using firewalld:

Open the port

Firewall-cmd-zone=public-add-port=80/tcp-permanent

Meaning of the command:

-- zone # scope

-- add-port=80/tcp # add port in the format: Port / communication protocol

-- permanent # is in effect forever. Without this parameter, it will expire after restart.

Restart the firewall

Firewall-cmd-reload

The above is all the contents of the article "sample Analysis of the updated features of the CentOS7.0 command". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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