linuxs下的jdk+tomcat+mysql配置具体步骤 / 憋错料

Xshell:\>
Connecting to 192.168.43.128:22...
Connection established.
Escape character is ‘^@]‘.

/usr/bin/xauth: creating new authority file /root/.Xauthority
[[email protected] ~]# ipconfig
-bash: ipconfig: command not found
[[email protected] ~]# ifconfig
eth0      Link encap:Ethernet HWaddr 00:0C:29:95:88:4E
          inet addr:192.168.43.128 Bcast:192.168.43.255 Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe95:884e/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:146 errors:0 dropped:0 overruns:0 frame:0
          TX packets:79 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:13338 (13.0 KiB) TX bytes:9373 (9.1 KiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1 Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING MTU:16436 Metric:1
          RX packets:8 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:480 (480.0 b) TX bytes:480 (480.0 b)

[[email protected] ~]# ls
anaconda-ks.cfg install.log install.log.syslog
[[email protected] ~]# cd /usr/local/tmp
[[email protected] tmp]# ls
jdk-7u80-linux-x64.tar.gz
[[email protected] tmp]# tar zxf jdk-7u80-linux-x64.tar.gz
[[email protected] tmp]# ls
jdk1.7.0_80 jdk-7u80-linux-x64.tar.gz
[[email protected] tmp]# cp -r jdk1.7.0_80 /usr/local/jdk7
[[email protected] tmp]# cd ..
[[email protected] local]# ls
bin etc games include jdk7 lib lib64 libexec sbin share src tmp
[[email protected] local]# vim /etc/profile
[[email protected] local]# source /etc/profile
[[email protected] local]# java -version
java version "1.7.0_80"
Java(TM) SE Runtime Environment (build 1.7.0_80-b15)
Java HotSpot(TM) 64-Bit Server VM (build 24.80-b11, mixed mode)
[[email protected] local]# vim /etc/profile
[[email protected] local]# source /etc/profile
[[email protected] local]# java -version
java version "1.7.0_80"
Java(TM) SE Runtime Environment (build 1.7.0_80-b15)
Java HotSpot(TM) 64-Bit Server VM (build 24.80-b11, mixed mode)
[[email protected] local]# cd tmp
[[email protected] tmp]# vim demo.java
[[email protected] tmp]# javac demo.java
demo.java:3: error: package system does not exist
system.out.println("hello world");
      ^
1 error
[[email protected] tmp]# vim demo.java
[[email protected] tmp]# javac demo.java
[[email protected] tmp]# java demo
hello world
[[email protected] tmp]# ls
apache-tomcat-7.0.68.tar.gz demo.class demo.java jdk1.7.0_80 jdk-7u80-linux-x64.tar.gz mysql-5.6.31-linux-glibc2.5-x86_64.tar.gz
[[email protected] tmp]# tar zxf apache-tomcat-7.0.68.tar.gz
[[email protected] tmp]# ls
apache-tomcat-7.0.68 apache-tomcat-7.0.68.tar.gz demo.class demo.java jdk1.7.0_80 jdk-7u80-linux-x64.tar.gz mysql-5.6.31-linux-glibc2.5-x86_64.tar.gz
[[email protected] tmp]# cp -r apache-tomcat-7.0.68 ../tomcat
[[email protected] tmp]# cd ..
[[email protected] local]# ls
bin etc games include jdk7 lib lib64 libexec sbin share src tmp tomcat
[[email protected] local]# cd /etc/profile
-bash: cd: /etc/profile: Not a directory
[[email protected] local]# vim /etc/profile
[[email protected] local]# source /etc/profile
[[email protected] local]# cd tomcat
[[email protected] tomcat]# cd bin
[[email protected] bin]# ls
bootstrap.jar catalina.sh         commons-daemon.jar            configtest.bat daemon.sh   digest.sh         setclasspath.sh shutdown.sh startup.sh       tomcat-native.tar.gz tool-wrapper.sh version.sh
catalina.bat   catalina-tasks.xml commons-daemon-native.tar.gz configtest.sh   digest.bat setclasspath.bat shutdown.bat     startup.bat tomcat-juli.jar tool-wrapper.bat      version.bat
[[email protected] bin]# ./startup.sh
Using CATALINA_BASE:   /usr/local/tomcat
Using CATALINA_HOME:   /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME:        /usr/local/jdk7
Using CLASSPATH:       /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar
Tomcat started.
[[email protected] bin]# vim /etc/sysconfig/iptables
[[email protected] bin]# service iptables restart
iptables: Setting chains to policy ACCEPT: filter          [ OK ]
iptables: Flushing firewall rules:                         [ OK ]
iptables: Unloading modules:                               [ OK ]
iptables: Applying firewall rules:                         [ OK ]
[[email protected] bin]# ls
bootstrap.jar catalina.sh         commons-daemon.jar            configtest.bat daemon.sh   digest.sh         setclasspath.sh shutdown.sh startup.sh       tomcat-native.tar.gz tool-wrapper.sh version.sh
catalina.bat   catalina-tasks.xml commons-daemon-native.tar.gz configtest.sh   digest.bat setclasspath.bat shutdown.bat     startup.bat tomcat-juli.jar tool-wrapper.bat      version.bat
You have mail in /var/spool/mail/root
[[email protected] bin]# ./shutdown.sh
Using CATALINA_BASE:   /usr/local/tomcat
Using CATALINA_HOME:   /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME:        /usr/local/jdk7
Using CLASSPATH:       /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar
[[email protected] bin]# ./startup.sh & tailf /usr/local/tomcat/logs/catalina.out
[1] 35423
Jun 26, 2019 12:48:23 PM org.apache.catalina.core.StandardService stopInternal
INFO: Stopping service Catalina
Jun 26, 2019 12:48:23 PM org.apache.coyote.AbstractProtocol stop
INFO: Stopping ProtocolHandler ["http-bio-8080"]
Jun 26, 2019 12:48:23 PM org.apache.coyote.AbstractProtocol stop
INFO: Stopping ProtocolHandler ["ajp-bio-8009"]
Jun 26, 2019 12:48:23 PM org.apache.coyote.AbstractProtocol destroy
INFO: Destroying ProtocolHandler ["http-bio-8080"]
Jun 26, 2019 12:48:23 PM org.apache.coyote.AbstractProtocol destroy
INFO: Destroying ProtocolHandler ["ajp-bio-8009"]
Using CATALINA_BASE:   /usr/local/tomcat
Using CATALINA_HOME:   /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME:        /usr/local/jdk7
Using CLASSPATH:       /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar
Tomcat started.
Jun 26, 2019 12:49:25 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Server version:        Apache Tomcat/7.0.68
Jun 26, 2019 12:49:26 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Server built:          Feb 8 2016 20:25:54 UTC
Jun 26, 2019 12:49:26 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Server number:         7.0.68.0
Jun 26, 2019 12:49:26 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: OS Name:               Linux
Jun 26, 2019 12:49:26 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: OS Version:            2.6.32-431.el6.x86_64
Jun 26, 2019 12:49:26 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Architecture:          amd64
Jun 26, 2019 12:49:26 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Java Home:             /usr/local/jdk7/jre
Jun 26, 2019 12:49:26 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: JVM Version:           1.7.0_80-b15
Jun 26, 2019 12:49:26 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: JVM Vendor:            Oracle Corporation
Jun 26, 2019 12:49:26 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: CATALINA_BASE:         /usr/local/tomcat
Jun 26, 2019 12:49:26 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: CATALINA_HOME:         /usr/local/tomcat
Jun 26, 2019 12:49:26 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Djava.util.logging.config.file=/usr/local/tomcat/conf/logging.properties
Jun 26, 2019 12:49:26 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
Jun 26, 2019 12:49:26 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Djava.endorsed.dirs=/usr/local/tomcat/endorsed
Jun 26, 2019 12:49:26 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Dcatalina.base=/usr/local/tomcat
Jun 26, 2019 12:49:26 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Dcatalina.home=/usr/local/tomcat
Jun 26, 2019 12:49:26 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Djava.io.tmpdir=/usr/local/tomcat/temp
Jun 26, 2019 12:49:26 PM org.apache.catalina.core.AprLifecycleListener lifecycleEvent
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
Jun 26, 2019 12:49:26 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
Jun 26, 2019 12:49:26 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["ajp-bio-8009"]
Jun 26, 2019 12:49:26 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 1723 ms
Jun 26, 2019 12:49:26 PM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
Jun 26, 2019 12:49:26 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.68
Jun 26, 2019 12:49:26 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /usr/local/tomcat/webapps/manager
Jun 26, 2019 12:49:27 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deployment of web application directory /usr/local/tomcat/webapps/manager has finished in 1,331 ms
Jun 26, 2019 12:49:27 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /usr/local/tomcat/webapps/examples
Jun 26, 2019 12:49:28 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deployment of web application directory /usr/local/tomcat/webapps/examples has finished in 824 ms
Jun 26, 2019 12:49:28 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /usr/local/tomcat/webapps/host-manager
Jun 26, 2019 12:49:28 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deployment of web application directory /usr/local/tomcat/webapps/host-manager has finished in 156 ms
Jun 26, 2019 12:49:28 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /usr/local/tomcat/webapps/docs
Jun 26, 2019 12:49:29 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deployment of web application directory /usr/local/tomcat/webapps/docs has finished in 108 ms
Jun 26, 2019 12:49:29 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /usr/local/tomcat/webapps/ROOT
Jun 26, 2019 12:49:29 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deployment of web application directory /usr/local/tomcat/webapps/ROOT has finished in 137 ms
Jun 26, 2019 12:49:29 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
Jun 26, 2019 12:49:29 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]
Jun 26, 2019 12:49:29 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 2768 ms
^C
[1]+ Done                    ./startup.sh
[[email protected] bin]# cd /usr/local/tmp
[[email protected] tmp]# ls
apache-tomcat-7.0.68 apache-tomcat-7.0.68.tar.gz demo.class demo.java jdk1.7.0_80 jdk-7u80-linux-x64.tar.gz mysql-5.6.31-linux-glibc2.5-x86_64.tar.gz
[[email protected] tmp]# tar zxf mysql-5.6.31-linux-glibc2.5-x86_64.tar.gz
[[email protected] tmp]# ls
apache-tomcat-7.0.68 apache-tomcat-7.0.68.tar.gz demo.class demo.java jdk1.7.0_80 jdk-7u80-linux-x64.tar.gz mysql-5.6.31-linux-glibc2.5-x86_64 mysql-5.6.31-linux-glibc2.5-x86_64.tar.gz
[[email protected] tmp]# cp -r mysql-5.6.31-linux-glibc2.5-x86_64 ../mysql
[[email protected] tmp]# groupadd mysql
[[email protected] tmp]# useradd -r -g mysql mysql
[[email protected] tmp]# cd ..
[[email protected] local]# cd mysql
[[email protected] mysql]# chgrp -R mysql .
[[email protected] mysql]# chown -R mysql .
[[email protected] mysql]# ls /etc/my.cnf
/etc/my.cnf
[[email protected] mysql]# rm /etc/my.cnf
rm: remove regular file `/etc/my.cnf‘? y
[[email protected] mysql]# ./scripts/mysql_install_db --user=mysql
Installing MySQL system tables...2019-06-26 13:08:11 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2019-06-26 13:08:11 0 [Note] ./bin/mysqld (mysqld 5.6.31) starting as process 35505 ...
2019-06-26 13:08:11 35505 [Note] InnoDB: Using atomics to ref count buffer pool pages
2019-06-26 13:08:11 35505 [Note] InnoDB: The InnoDB memory heap is disabled
2019-06-26 13:08:11 35505 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2019-06-26 13:08:11 35505 [Note] InnoDB: Memory barrier is not used
2019-06-26 13:08:11 35505 [Note] InnoDB: Compressed tables use zlib 1.2.3
2019-06-26 13:08:11 35505 [Note] InnoDB: Using Linux native AIO
2019-06-26 13:08:11 35505 [Note] InnoDB: Using CPU crc32 instructions
2019-06-26 13:08:11 35505 [Note] InnoDB: Initializing buffer pool, size = 128.0M
2019-06-26 13:08:11 35505 [Note] InnoDB: Completed initialization of buffer pool
2019-06-26 13:08:11 35505 [Note] InnoDB: The first specified data file ./ibdata1 did not exist: a new database to be created!
2019-06-26 13:08:11 35505 [Note] InnoDB: Setting file ./ibdata1 size to 12 MB
2019-06-26 13:08:11 35505 [Note] InnoDB: Database physically writes the file full: wait...
2019-06-26 13:08:11 35505 [Note] InnoDB: Setting log file ./ib_logfile101 size to 48 MB
2019-06-26 13:08:11 35505 [Note] InnoDB: Setting log file ./ib_logfile1 size to 48 MB
2019-06-26 13:08:11 35505 [Note] InnoDB: Renaming log file ./ib_logfile101 to ./ib_logfile0
2019-06-26 13:08:11 35505 [Warning] InnoDB: New log files created, LSN=45781
2019-06-26 13:08:11 35505 [Note] InnoDB: Doublewrite buffer not found: creating new
2019-06-26 13:08:11 35505 [Note] InnoDB: Doublewrite buffer created
2019-06-26 13:08:11 35505 [Note] InnoDB: 128 rollback segment(s) are active.
2019-06-26 13:08:11 35505 [Warning] InnoDB: Creating foreign key constraint system tables.
2019-06-26 13:08:11 35505 [Note] InnoDB: Foreign key constraint system tables created
2019-06-26 13:08:11 35505 [Note] InnoDB: Creating tablespace and datafile system tables.
2019-06-26 13:08:11 35505 [Note] InnoDB: Tablespace and datafile system tables created.
2019-06-26 13:08:11 35505 [Note] InnoDB: Waiting for purge to start
2019-06-26 13:08:11 35505 [Note] InnoDB: 5.6.31 started; log sequence number 0
2019-06-26 13:08:12 35505 [Note] Binlog end
2019-06-26 13:08:12 35505 [Note] InnoDB: FTS optimize thread exiting.
2019-06-26 13:08:12 35505 [Note] InnoDB: Starting shutdown...
2019-06-26 13:08:13 35505 [Note] InnoDB: Shutdown completed; log sequence number 1625977
OK

Filling help tables...2019-06-26 13:08:13 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2019-06-26 13:08:13 0 [Note] ./bin/mysqld (mysqld 5.6.31) starting as process 35527 ...
2019-06-26 13:08:13 35527 [Note] InnoDB: Using atomics to ref count buffer pool pages
2019-06-26 13:08:13 35527 [Note] InnoDB: The InnoDB memory heap is disabled
2019-06-26 13:08:13 35527 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2019-06-26 13:08:13 35527 [Note] InnoDB: Memory barrier is not used
2019-06-26 13:08:13 35527 [Note] InnoDB: Compressed tables use zlib 1.2.3
2019-06-26 13:08:13 35527 [Note] InnoDB: Using Linux native AIO
2019-06-26 13:08:13 35527 [Note] InnoDB: Using CPU crc32 instructions
2019-06-26 13:08:13 35527 [Note] InnoDB: Initializing buffer pool, size = 128.0M
2019-06-26 13:08:13 35527 [Note] InnoDB: Completed initialization of buffer pool
2019-06-26 13:08:13 35527 [Note] InnoDB: Highest supported file format is Barracuda.
2019-06-26 13:08:13 35527 [Note] InnoDB: 128 rollback segment(s) are active.
2019-06-26 13:08:13 35527 [Note] InnoDB: Waiting for purge to start
2019-06-26 13:08:13 35527 [Note] InnoDB: 5.6.31 started; log sequence number 1625977
2019-06-26 13:08:13 35527 [Note] Binlog end
2019-06-26 13:08:13 35527 [Note] InnoDB: FTS optimize thread exiting.
2019-06-26 13:08:13 35527 [Note] InnoDB: Starting shutdown...
2019-06-26 13:08:15 35527 [Note] InnoDB: Shutdown completed; log sequence number 1625987
OK

To start mysqld at boot time you have to copy
support-files/mysql.server to the right place for your system

PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !
To do so, start the server, then issue the following commands:

./bin/mysqladmin -u root password ‘new-password‘
./bin/mysqladmin -u root -h localhost.localdomain password ‘new-password‘

Alternatively you can run:

./bin/mysql_secure_installation

which will also give you the option of removing the test
databases and anonymous user created by default. This is
strongly recommended for production servers.

See the manual for more instructions.

You can start the MySQL daemon with:

cd . ; ./bin/mysqld_safe &

You can test the MySQL daemon with mysql-test-run.pl

cd mysql-test ; perl mysql-test-run.pl

Please report any problems at http://bugs.mysql.com/

The latest information about MySQL is available on the web at

http://www.mysql.com

Support MySQL by buying support/licenses at http://shop.mysql.com

New default config file was created as ./my.cnf and
will be used by default by the server when you start it.
You may edit this file to change server settings

[[email protected] mysql]# cp support-files/my-default.cnf /etc/my.cnf
[[email protected] mysql]# cp support-files/my-default.cnf /etc/my.cnf
cp: overwrite `/etc/my.cnf‘? n
[[email protected] mysql]# cp support-files/mysql.server /etc/rc.d/init.d/mysql
[[email protected] mysql]# ln -s /usr/local/mysql/bin/mysql /usr/bin/mysql
[[email protected] mysql]# service mysql start
Starting MySQL.. SUCCESS!
[[email protected] mysql]# mysql -u root -p
Enter password:
ERROR 1045 (28000): Access denied for user ‘root‘@‘localhost‘ (using password: YES)
[[email protected] mysql]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.6.31 MySQL Community Server (GPL)

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

mysql> show datebases
    -> ;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘datebases‘ at line 1
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| test               |
+--------------------+
4 rows in set (0.00 sec)

mysql> exit
Bye
[[email protected] mysql]# vim /etc/my.cnf
[[email protected] mysql]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.6.31 MySQL Community Server (GPL)

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

mysql> use mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> update user set password= passworD ("smallming") where user=‘root‘;
Query OK, 4 rows affected (0.00 sec)
Rows matched: 4 Changed: 4 Warnings: 0

mysql> update user set password=passworD("root")where user=‘root‘;
Query OK, 4 rows affected (0.00 sec)
Rows matched: 4 Changed: 4 Warnings: 0

mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)

mysql> mysql -u root -p
-> ;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘mysql -u root -p‘ at line 1
mysql> Ctrl-C -- exit!
Aborted
[[email protected] mysql]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.6.31 MySQL Community Server (GPL)

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

mysql> Ctrl-C -- exit!
Aborted
[[email protected] mysql]# mysql -u root -p
Enter password:
ERROR 1045 (28000): Access denied for user ‘root‘@‘localhost‘ (using password: NO)
[[email protected] mysql]# no
-bash: no: command not found
[[email protected] mysql]# mysql -u root -p
Enter password:
ERROR 1045 (28000): Access denied for user ‘root‘@‘localhost‘ (using password: NO)
[[email protected] mysql]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 7
Server version: 5.6.31 MySQL Community Server (GPL)

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

mysql> use mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

mysql> grant all privileges on *.* to ‘root‘@‘%‘ identified by "root" with grant option;
Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> Ctrl-C -- exit!
Aborted
[[email protected] mysql]# vim /etc/sysconfig/iptables
[[email protected] mysql]# service iptables restart
iptables: Setting chains to policy ACCEPT: filter          [ OK ]
iptables: Flushing firewall rules:                         [ OK ]
iptables: Unloading modules:                               [ OK ]
iptables: Applying firewall rules:                         [ OK ]
[[email protected] mysql]#vim /etc/profile