Change Hostname in CentOS 7
After upgrading the VPS system to CentOS 7, I tried to modify/etc/sysconfig/network to modify the hostname, but it was useless. the method for modifying the Hostname of CentOS 7 is different from that of the previous version. We hope this article will help you modify the Hostname on CentOS 7
At the Linux command line, enter hostname, view the current hostname, and if you want to modify it, add a new host name directly after hostname (note: The following actions require root user execution), such as:
# hostname Newhostname
Note, however, that the above hostname
Today, hostname settings are not very concerned, but once a Linux host encounters a hostname setting problem, it may also cause some incredible network problems and service process problems.Hostname check,Uname-nHostname-A |-S |-d |-FHostname commands can be used to determine the host and hostname settings;
The gethostname () function gets localhost because
Http://publib.boulder.ibm.com/infocenter/db2luw/v9r5/index.jsp? Topic =/com.ibm.db2.luw.messages. SQL .doc/doc/msql06031n.html
Question
Changing hostname of the DB2 server. What updates in DB2 need to be made?Cause
Changing the DB2 server's hostname.Answer
Perform the following on the DB2 Server:
1) login as the dasadm user on Unix/Linux or local administrator on Windows. Stop the DB2 Administration Server (DAS ):
Db2admin stop
2) login as the inst
Two changes need to be modified: one is/etc/sysconfig/network and the other is/etc/hosts, and only modifying any of them will cause system startup exceptions. First switch to the root user.
/etc/sysconfig/network
Open the file with any of your favorite editors, with a line of Hostname=localhost.localdomain (if default), and modify Localhost.localdomain to your hostname.
/etc/hosts
You can change the host name of linuxmintubuntu in two steps: 1. first, modify the etchostname file sudovimetchostname and change the host name to the one you want to modify. 2. then, modify the etchosts file sudovimetchosts and add a 127001 linuxmint/ubuntu command to modify the host name in two steps: 1. first modify the/etc/hostname file sudo vim/etc/hostname to change the host name to the one you want t
Modify the hostname settings in Linux-Linux Enterprise Application-Linux server application information. For more information, see. You need to modify two files:
1. vi/etc/hosts
The content of/etc/hosts is generally similar to the following:
127.0.0.1 localhost. localdomain localhost
192.168.1.195 debian. localdomain debian
Modify: localhost. localdomain = yourname
Save and exit.
2. vi/etc/sysconfig/network
You can directly modif
Rare BUG in MySQL database -- Can't get hostname for your address, mysqlhostname
When connecting to mysql jdbc
Com. mysql. jdbc. exceptions. jdbc4.MySQLNonTransientConnectionException: Communication link failure, message from server: "Can't get hostname for your address"
Whether it is using jdbc: mysql: // 127.0.0.1: 3306 or jdbc: mysql: // localhost: 3306, this error occurs.
This error indicates that
#!/usr/bin/envpython#_*_coding:utf-8_*_ "If you want to run a batch configuration: Run this script with Ansible Ansibletestserver -mscript-a "chage_hostname.py" "importosshell="/sbin/ifconfig -a|grepinet|grep-v127.0.0.1|grep-vinet6|awk ' {print$2} ' |tr -d ' addr: ' #定义获取IP地址的shell命令res =os.popen (Shell, ' R ', 0) #执行shell命令, and return value IPADDR =str (Res.read ()) #读取返回值, i.e. IP address str_ip=ipaddr.replace ('. ', '-') #将IP地址中的 "." Replace with "-" hostnames= ' ambari-%s ' %str_ip #组成
Today's new site found in the Chrome browser, through localhost access is valid, but through the native IP even 127.0.0.1 access is not valid,The error in the report is that the Request Invalid HostNameSo that the site through two computers access, debugging encountered a small resistanceHere's how to fix it:1. In the status bar, select the Iispress site, right-click to display all applications2. Click the site name, select the configuration path in the path indicated below, open the Application
SVN reports the following error:Org. Tigris. subversion. javahl. clientexception: RA layer request failedsvn: Options of '[Your SVN address ]':Cocould not resolve hostname 'svn .123.net': Do not know such a host. (Http://svn.123.net: 82) 1. in DOS mode, Ping svn.123.net and you will see the corresponding IP address, for example, 10.0.1.3 2. find the hosts file address of your system and move it out. You can edit the status and add 10.0.1.3 svn.123.net
I. Network configuration modifications1. Temporary modification (Ip,dns,netmask,gateway)Temporarily modify the network configuration, as long as it does not involve the modification of the configuration file, after the network service restarts, all settings expire2. Permanent modification (Ip,dns,netmask,gateway)Modify the network configuration file "Ifcfg-ens33" and save it for permanent effectTwo. machine hostname and domain name setting in the clus
Label:Reprint Please specify Http://www.cnblogs.com/juandx/p/5418204.html OpenStack has 3 libraries, nova,neutron,keystone, what I need to do now is cross-Library tables to query VM information Get a virtual machine for floating_ip, fix_ip, PROJECT_NAME, user_name, hostname, host (don't know what the difference between host and node in the Instances table)
Select J.floating_ip_address as Floating_ip, I.fix_ip, i.port_id, I.project_name, I.user_name,
Fix to modify hostname causes MySQL restart slave failed(This happens only in the case where the slave information is present in the file, if there is no such problem in the table):Sometimes we change the host name very early, after running for several months, suddenly system problems, restart the database, found that start slave not come. The Relay-log file name and offset are not found.Workaround:> Show Slave status\g Note the current execution to t
When you connect MySQL jdbc, it throws aCom.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException:Communication link failure, message from Server: "Can ' t get hostname for your address"Error, whether it is using jdbc:mysql://127.0.0.1:3306 or jdbc:mysql://localhost:3306 , this error has occurred.This error means "your address can not get host name", Think of skip-name-resolve parameters, but add this parameter, because I use the Windows in
This problem has not appeared before, is this time in my lead in the performance test A1 class There are individual students appeared this problem, just to sort out the next solution. This issue occurs because of a problem when detecting hostname, the workaround is as follows:Modify the MySQL configuration file my.cnf, and then add a line under [mysqld]:Skip-name-resolve, then save the exit, then restart the MySQL service. using the ODBC link again is
For Linux and FreeBSD, modify the hostname-Linux Enterprise Application-Linux server application information. For more information, see. Changing the host name in Linux and FreeBSD is the same as the following command:
Hostname host.mydomain.com
Specifically, host.mydomain.com is the newly designated hostname, but to automatically use the new
Many applications will involve FQDNsWhat is the difference between a fqnd and a host that the salt gets to be different?The FQDNYou can ' t change the FQDN (as returned by hostname--fqdn) or the DNS domain name (as returned by DnsDomainName) with this Command. The FQDN ofThe system is the name of the resolver (3) returns for the host name.The Technically:the FQDN is the name of the gethostbyname (2) returns for the host, name returned by GetHostName (
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