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- How to check whether a certain software is installed in centos
- The method for centos to check whether a certain software is installed is: 1. Execute the command [rpm -q xxx] to check; 2. Execute the command [rpm -qa | grep xxx] to check; 3. Execute the command [xxx -v] to check.
- CentOS 3290 2020-04-02 15:08:11
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- How to check whether the port is open in centos
- The way to check whether the port is open in centos is: 1. Check through the [telnet ip port] command; 2. Check through the [nc -v ip port] command; 3. Check through [firewall-cmd --query-port=port/tcp] command to view.
- CentOS 6249 2020-04-02 14:57:12
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- What should I do if centos cannot connect to the Internet?
- The solution to the problem that centos cannot connect to the Internet is: 1. Open the ifcfg-ens33 configuration file; 2. Modify the configuration [ONBOOT=yes]; 3. Execute the command [service network restart] to restart the network service.
- CentOS 2977 2020-04-02 14:47:04
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- What should I do if centos cannot start the network card?
- The solution to the problem that centos cannot start the network card is: 1. Stop the NetworkManager management suite; 2. Disable NetworkManager from starting at boot; 3. Execute the command [systemctl start network] to restart the network.
- CentOS 2221 2020-04-02 14:36:53
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- Desktop service does not start when centos starts
- The solution to not starting the desktop service when centos starts is: 1. Open the /etc/inittab file; 2. Change the [id:5:initdefault:] configuration to [id:3:initdefault:].
- CentOS 2899 2020-04-02 14:16:54
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- centos cannot recognize new network card after adding it
- The solution to the problem that centos cannot recognize a new network card after adding it is: 1. Execute the command [ip addr] to view the real mac of the network card; 2. Open the [ifcfg-eth1] configuration file and modify the HWADD, UUID and other configurations; 3. Restart the network card.
- CentOS 2818 2020-04-02 14:06:42
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- centos cannot ping external network
- The solution to centos being unable to ping the external network is: 1. First open the resolv.conf file and check whether the dns is correct. If it does not exist, add it, such as [nameserver 8.8.8.8]; 2. Add routes according to your own network segment.
- CentOS 2694 2020-04-02 13:56:30
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- How to solve the problem of being unable to access the Internet after centos installation
- The solution to the problem of being unable to access the Internet after centos installation is: 1. Log in as the root user and enter the network-scripts/ directory; 2. Open the ifcfg-ens33 network card configuration file; 3. Modify the configuration [ONBOOT=yes]; 4. Restart the network service.
- CentOS 3723 2020-04-02 13:41:39
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- What should I do if I cannot use yum to install software on centos?
- The solution to the problem that centos cannot use yum to install software is: 1. Download the corresponding version of the yum source; 2. Rename the downloaded yum source to CentOS-Base.repo; 3. Add the configuration [nameserver 8.8.8.8]; 4. [yum makecache].
- CentOS 4826 2020-04-02 13:30:26
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- What should I do if something goes wrong when installing mysql on centos?
- The solution to the error when installing mysql on centos is: 1. Execute the command [yum -y remove mysql-libs-*] to remove the conflicting libs package; 2. Execute the command [yum install mysql mysql-server -y] to reinstall it. .
- CentOS 2372 2020-04-02 13:14:36
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- How to install deb format software package on centos
- The method to install deb format software package in centos is: 1. Enter the root user and install alien; 2. Execute the [alien -r software generated] command to convert the software package format; 3. Execute the [rpm -ivh file name rpm] command to force the installation of the software .
- CentOS 14231 2020-04-02 11:45:30
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- When installing centos7 on a virtual machine, it prompts that the hard disk cannot be found.
- The solution to the problem that the hard disk cannot be found when installing centos7 on a virtual machine is: 1. Shut down the virtual machine and remove the hard disk; 2. Add a new hard disk and select IDE as the hard disk type; 3. Set the size of the virtual hard disk and create a virtual hard disk file storage path.
- CentOS 8049 2020-04-02 11:29:06
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- What to do if the USB disk cannot be found when installing centos7
- The solution to the problem that the USB disk cannot be found when installing centos7 is: modify [hd:LABEL=CentOS\x207\x20x86_64 rd.live.check quite] to [hd:/dev/sdb4 quite].
- CentOS 7179 2020-04-02 11:09:56
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- How to use yum to install oracle under centos7
- The method to use yum to install oracle under centos7 is: 1. Download the corresponding yum source according to the requirements; 2. Execute the wget command to install RMP-GPG-KEY; 3. Execute the yum command to install oracle-rdbms-server-11gR2-preinstall.x86_64.
- CentOS 5580 2020-04-02 10:59:29
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- How to use postfix to send emails in centos7
- The method for centos7 to use postfix to send mail is: 1. Configure host mapping; 2. Install postfix tool; 3. Define postfix configuration file; 4. Apply for 163 mail certificate; 5. Borrow 163 mailbox to send mail; 6. Restart the service and send test mail.
- CentOS 3418 2020-04-02 10:49:06
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