1. Enter the bin directory of tomcat under the Linux system.
For example: cd /usr/local/apache-tomcat-7.0.42/bin
2. Close the tomcat service, especially when it has been started, but there are some exceptions
./
3. Check if tomcat is indeed closed
ps -ef|grep java
If the following similar prompt appears, it means that tomcat has been closed
root 30248 30113 0 10:00 pts/0 00:00:00 grep java
4. Finally restart tomcat
./