新手學習mysql，在阿里雲主機上安裝mysql5.7.18.
參考文件: 安裝步驟
錯誤檢查: can』t connect to local mysql server through socket 『/tmp/mysql.sock』 (2)
獲取安裝包，解壓至安裝目錄，新增使用者和組，更改所有者和所屬組
wget
tar zxf mysql-
5.7.18
-linux
-glibc2
.5-x86_64
.tar.gz -c /usr/local
cd /usr/local
mv mysql-
5.7.18
-linux
-glibc2
.5-x86_64
/ mysql
groupadd mysql
useradd -r
-g mysql mysql
chown -r mysql:mysql mysql/
# for advice on how to change settings please see
#
# *** do not edit this file. it's a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of mysql.
[mysqld]
sql_mode=no_engine_substitution,strict_trans_tables
# 一般配置選項
basedir = /usr/local/mysql
datadir = /usr/local/mysql/data
port = 3306
socket = /var/run/mysqld/mysqld.sock
#網上很多教程裡socket的路徑是/tmp/mysql.sock
#我一直不行，按照本文配置成功，後續還有地方要修改
character-set-server=utf8
#下面是可選項，要不要都行，如果出現啟動錯誤，則全部注釋掉，保留最基本的配置選項，然後嘗試新增某些配置項後啟動，檢測配置項是否有誤(首次安裝報錯，以下內容已刪)
back_log = 300
max_connections = 3000
max_connect_errors = 50
table_open_cache = 4096
max_allowed_packet = 32m
#binlog_cache_size = 4m
max_heap_table_size = 128m
read_rnd_buffer_size = 16m
sort_buffer_size = 16m
join_buffer_size = 16m
thread_cache_size = 16
query_cache_size = 128m
query_cache_limit = 4m
ft_min_word_len = 8
thread_stack = 512k
transaction_isolation = repeatable-read
tmp_table_size = 128m
#log-bin=mysql-bin
long_query_time = 6
server_id=1
innodb_buffer_pool_size = 1g
innodb_thread_concurrency = 16
innodb_log_buffer_size = 16m
innodb_log_file_size = 512m
innodb_log_files_in_group = 3
innodb_max_dirty_pages_pct = 90
innodb_lock_wait_timeout = 120
innodb_file_per_table = on
[mysqldump]
quick
max_allowed_packet = 32m
[mysql]
no-auto-rehash
default-character-set=utf8
safe-updates
[myisamchk]
key_buffer = 16m
sort_buffer_size = 16m
read_buffer = 8m
write_buffer = 8m
[mysqlhotcopy]
interactive-timeout
[mysqld_safe]
open-files-limit = 8192
一些老版本的mysql是通過mysql_install_db的方式安裝，在5.7的版本中不推薦，改用mysqld安裝
bin/mysqld--
initialize
-insecure--
user=mysql--
basedir=/usr/local/mysql/--
datadir=/usr/local/mysql/data/
cp ./support-files/my-default.cnf /etc/my.cnf
cp ./support-files/mysql.service /etc/init.d/mysqld
./bin/mysqld_safe --user=mysql &jobs看到mysqld_safe在執行即可
出現以下報錯
can』t connect to local mysql server through socket 『/tmp/mysql.sock』 (2)
報錯恢復是因為在my.conf配置檔案中socket = /var/run/mysqld/mysqld.sock，而不是/tmp目錄下，所以要建立乙個軟連線
ln -s /var/run/mysqld/mysqld.sock /tmp/mysql.sock登陸mysql
手工設定密碼
mysqladmin -uroot password '123456'enter password:
welcome to
the mysql monitor. commands end
with ; or \g.
your mysql connection idis3
server version: 5.7
.18 mysql community server (gpl)
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