lnmp1.3安装后mysql突然运行不了，显示the server quit without updating PID file

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这应该就是错误日志吧，新手菜鸟不太会玩Linux
160909 11:54:54 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/var
160909 11:54:54 [Note] /usr/local/mysql/bin/mysqld (mysqld 5.5.48-log) starting as process 15733 ...
160909 11:54:54 [Note] Plugin 'FEDERATED' is disabled.
160909 11:54:54 InnoDB: The InnoDB memory heap is disabled
160909 11:54:54 InnoDB: Mutexes and rw_locks use GCC atomic builtins
160909 11:54:54 InnoDB: Compressed tables use zlib 1.2.3
160909 11:54:54 InnoDB: Initializing buffer pool, size = 16.0M
160909 11:54:54 InnoDB: Completed initialization of buffer pool
InnoDB: The first specified data file /usr/local/mysql/var/ibdata1 did not exist:
InnoDB: a new database to be created!
160909 11:54:54  InnoDB: Setting file /usr/local/mysql/var/ibdata1 size to 10 MB
InnoDB: Database physically writes the file full: wait...
160909 11:54:54  InnoDB: Log file /usr/local/mysql/var/ib_logfile0 did not exist: new to be created
InnoDB: Setting log file /usr/local/mysql/var/ib_logfile0 size to 5 MB
InnoDB: Database physically writes the file full: wait...
160909 11:54:54  InnoDB: Log file /usr/local/mysql/var/ib_logfile1 did not exist: new to be created
InnoDB: Setting log file /usr/local/mysql/var/ib_logfile1 size to 5 MB
InnoDB: Database physically writes the file full: wait...
InnoDB: Doublewrite buffer not found: creating new
InnoDB: Doublewrite buffer created
InnoDB: 127 rollback segment(s) active.
InnoDB: Creating foreign key constraint system tables
InnoDB: Foreign key constraint system tables created
160909 11:54:54  InnoDB: Waiting for the background threads to start
160909 11:54:55 InnoDB: 5.5.48 started; log sequence number 0
160909 11:54:55 [Note] Server hostname (bind-address): '0.0.0.0'; port: 3306

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