CentOS7 0 Install JDK + Tomcat

1. Download and unpack it

2. Go to the /usr directory

2.5 Grant all JDK permissions

chmod 777 -R jdk

3. Modify the /etc/profile file

Plus at the bottom

 exportJAVA_HOME = / usr/Java/jdk1.7.0 _60exportJRE_HOME = / usr/Java/jdk1.7.0 _60 / jreexportCLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib

 export PATH=$PATH:$JAVA_HOME/bin
Copy the code

4. Source profile makes the file take effect

5. Check whether the java-version is installed successfully

• Tomcat installation

• 1. Unpack the

• • Unzip or tar

• 2. Move to /usr

• 3. Grant permission

  

• 4. Run the./startup.sh command to check whether the installation is successful.

• • 

• 5. Solve firewall and port problems

• • View tomcat logs in the bin directory./catalina.sh run.
  • Disabling the firewall service iptables stop// Redhat series

Service ufw stop // Ubuntu ufw disable The system does not automatically start upon startup

• • Check 8080 port usage netstat apn | grep, 8080

  • 

  • 

  • Or open port 8080

  • yum install -t iptables

  • service iptables status

  • service iptables start

  • Iptables -p INPUT ACCEPT #

  • Iptables -f # Clears all default rules

  • Iptables -x # Clear all custom rules

  • Iptables -z # counter 0

  • iptables -A INPUT -i lo -j ACCEPT

  • iptables -A INPUT -p tcp –dport 22 -j ACCEPT

  • Iptables -a INPUT -p TCP –dport 80 -j ACCEPT Opens port 80

  • Iptables -a INPUT -p TCP –dport 8080 -j ACCEPT Opens port 8080

  • Save the restart

  • service iptables save

  • service iptables restart

• If you can’t access it! View alitencent security group port!!
• mysql
• • 1. Check whether the mysql database exists
  • rpm -qa |grep mysql
  • 2. Delete the mysql service
  • rpm -e mysql
  • 2.5 Forcibly Deleting mysql Services
  • rpm -e –nodeps mysql
  • 3. Use yum to install mysql
  • Yum list | grep mysql check mysql list
  • 4. Install mysql services
  • yum install -y mysql-server mysql mysql-deve
  • 5. View the installation version
  • rpm -qi mysql-server
  • 6. Start the mysql service
  • service mysqld start
  • 7. Check whether the device is powered on
  • chkconfig –list |grep mysqld
  • 7.5 If startup is required
  • Chkconfig mysqld on then return to step 7
  • 8. Set the password of the mysql account
  • mysqladmin -u root password ‘root’
  • 9. Configuration file
  • /etc/my.cnf
  • 10. Database files
  • /var/lib/mysql
  • 11. The log
  • /var/log mysql.log