


How to solve the problem that ifconfig cannot be used in CentOS7 system
How to solve the problem that ifconfig cannot be used in CentOS7 system?
In the CentOS 7 system, you generally use "ip addr" to view the network card configuration information. Of course, you can also use ifconfig to achieve the same effect. However, not all CentOS 7 systems can use the ifconfig command during initial settings, as follows:
[root@sqj ~]# ifconfig -bash: /usr/sbin/ifconfig: No such file or directory
If the above prompt message appears, it means that the CentOS 7 system cannot use the ifconfig command, so how can I help? You can install network tools here to use this command normally:
#yum search ifconfig
In this way, you can view the installation package required for the ifconfig command "net-tools.x86_64
", then just install this software.
#yum -y install net-tools
After the installation is completed, you can use the ifconfig command to view IP information normally.
Through the above steps, the CentOS7 system can use the ifconfig command normally. If you are renting a RAKsmart US server and if the CentOS7 system ifconfig cannot be used, you can install the above method to solve it.
Related references: centOS tutorial
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Alternatives to CentOS include UbuntuServer, Debian, Fedora, RockyLinux, and AlmaLinux. 1) UbuntuServer is suitable for basic operations, such as updating software packages and configuring the network. 2) Debian is suitable for advanced usage, such as using LXC to manage containers. 3) RockyLinux can optimize performance by adjusting kernel parameters.

The CentOS shutdown command is shutdown, and the syntax is shutdown [Options] Time [Information]. Options include: -h Stop the system immediately; -P Turn off the power after shutdown; -r restart; -t Waiting time. Times can be specified as immediate (now), minutes ( minutes), or a specific time (hh:mm). Added information can be displayed in system messages.

The key differences between CentOS and Ubuntu are: origin (CentOS originates from Red Hat, for enterprises; Ubuntu originates from Debian, for individuals), package management (CentOS uses yum, focusing on stability; Ubuntu uses apt, for high update frequency), support cycle (CentOS provides 10 years of support, Ubuntu provides 5 years of LTS support), community support (CentOS focuses on stability, Ubuntu provides a wide range of tutorials and documents), uses (CentOS is biased towards servers, Ubuntu is suitable for servers and desktops), other differences include installation simplicity (CentOS is thin)

Steps to configure IP address in CentOS: View the current network configuration: ip addr Edit the network configuration file: sudo vi /etc/sysconfig/network-scripts/ifcfg-eth0 Change IP address: Edit IPADDR= Line changes the subnet mask and gateway (optional): Edit NETMASK= and GATEWAY= Lines Restart the network service: sudo systemctl restart network verification IP address: ip addr

CentOS installation steps: Download the ISO image and burn bootable media; boot and select the installation source; select the language and keyboard layout; configure the network; partition the hard disk; set the system clock; create the root user; select the software package; start the installation; restart and boot from the hard disk after the installation is completed.

The command to restart the SSH service is: systemctl restart sshd. Detailed steps: 1. Access the terminal and connect to the server; 2. Enter the command: systemctl restart sshd; 3. Verify the service status: systemctl status sshd.

Restarting the network in CentOS 8 requires the following steps: Stop the network service (NetworkManager) and reload the network module (r8169), start the network service (NetworkManager) and check the network status (by ping 8.8.8.8)

Reboot command is available to restart CentOS 7. The steps are as follows: Open the terminal window and enter the reboot command. Confirm the restart prompt. The system will restart and the boot menu will appear during this period. After the restart is complete, log in with the credentials.


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