echo 输出多行内容到文件

echo '

回车 + 粘贴

[mysqld]
skip-host-cache
skip-name-resolve
datadir = /var/lib/mysql
!includedir /etc/mysql/conf.d/
lower_case_table_names=1

server-id=3
log-bin=mysql-bin

sync_binlog=1
binlog_checksum=none
binlog_format=mixed

gtid-mode=on
enforce-gtid-consistency=true
log-slave-updates=1

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' > /etc/mysql/my.cnf

直接用从剪贴板粘贴出来的文件，覆盖原来文件的内容