Summary of CentOS-7 commands (1)

Minimal installation of centos 7

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View System Version Information

# Uname-

# Cat/etc/RedHat-release

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

# Yum-y update

Upgrade all packages without changing the software and system settings. upgrade the system version without changing the kernel.

# Yum-y upgrade

The configuration file of the host name in centos7 has changed. It is no longer/etc/sysconfig/network. Changing/etc/hostname will take effect.

# Vi/etc/hostname

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

View log files

# Tail-F/var/log/messages

Mount. DHCP is used as an example.

# Mkdir/mnt/CDROM

# Mount/dev/CDROM/mnt/CDROM

# Cd/mnt/CDROM/Packages

# Ls DHCP * view the DHCP installation package

# Rpm-uvh installation package

# Rpm-QC DHCP

Before changing a configuration file, we recommend that you back up it for later use.

# Cp/etc/DHCP/DHCPD. CONF/etc/DHCP/DHCPD. conf. Origin

Command changes

Systemctl is the command of the system service manager. It combines the two commands "service" and "chkconfig ".

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