mysql啟動問題

終於解決上週遺留下來的mysql不能啟動的問題了，原因是之前安裝了兩次mysql，而且路徑不同，這裡有別人的詳細解決方案：

由於之前不知道問題所在，所以重新裝了乙個虛擬機器，64bit的，前面不能make（zlib的問題，要對64機進行相應設定），編譯安裝成功後，又出現了不能啟動的問題，提示的問題如下：

111128 01:39:59 mysqld_safe logging to '/opt/mysql5/var/debian.err'. touch: cannot touch `/opt/mysql5/var/debian.err': no such file or directory chown: cannot access `/opt/mysql5/var/debian.err': no such file or directory 111128 01:39:59 mysqld_safe starting mysqld daemon with databases from /opt/mysql5/var bin/mysqld_safe: line 100: /opt/mysql5/var/debian.err: no such file or directory bin/mysqld_safe: line 137: /opt/mysql5/var/debian.err: no such file or directory 111128 01:39:59 mysqld_safe mysqld from pid file /opt/mysql5/var/debian.pid ended

bin/mysqld_safe: line 100: /opt/mysql5/var/debian.err: no such file or directory

找了半天，沒查出原因。最後發現，原來只是個小問題，先bin/mysql_install_db --user=mysql一下，再啟動，問題解決！

另需要強調的是，安裝mysql前一定不要忘記這兩句：

groupadd mysql

useradd －g mysql mysql

接下來繼續解決mongodb的問題，搭環境真苦逼！

另my.cnf具體內容如下：

[client]
port = 3306
socket = /tmp/mysql.sock
[mysqld]
port = 3306
bind-address = 0.0.0.0
socket = /tmp/mysql.sock
skip-external-locking
key_buffer_size = 16m
max_allowed_packet = 1m
table_open_cache = 64
sort_buffer_size = 512k
net_buffer_length = 8k
read_buffer_size = 256k
read_rnd_buffer_size = 512k
myisam_sort_buffer_size = 8m
server-id = 1
innodb_data_home_dir = /opt/mysql5/var
innodb_data_file_path = ibdata1:10m:autoextend
innodb_log_group_home_dir = /opt/mysql5/var
innodb_buffer_pool_size = 700m
innodb_additional_mem_pool_size = 2m
innodb_log_file_size = 5m
innodb_log_buffer_size = 8m
innodb_flush_log_at_trx_commit = 1
innodb_lock_wait_timeout = 50
[mysqldump]
quick
max_allowed_packet = 16m
[mysql]
no-auto-rehash
[myisamchk]
key_buffer_size = 20m
sort_buffer_size = 20m
read_buffer = 2m
write_buffer = 2m
[mysqlhotcopy]
interactive-timeout

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