Question

我正在运行以下sed命令来编辑具有特定参数的my.cnf。然而，它得到了我需要检查和修改的最后两个值，并且无法执行它们，尽管语法与之前修改的值没有区别。

sed -i s/".*old_passwords=[0-9]*"/"# old_passwords=1"/g /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/innodb_buffer_pool_size=/d' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/\old_passwords=/ainnodb_buffer_pool_size=5G' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/innodb_additional_mem_pool_size=/d' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/\innodb_buffer_pool_size=/ainnodb_additional_mem_pool_size=100M' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/innodb_file_per_table/d' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/\innodb_additional_mem_pool_size=/ainnodb_file_per_table' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/innodb_log_file_size=/d' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/\innodb_file_per_table/ainnodb_log_file_size=125M' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/innodb_flush_log_at_trx_commit=/d' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/\innodb_log_file_size=/ainnodb_flush_log_at_trx_commit=1' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/max_connections=/d' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/\innodb_flush_log_at_trx_commit=/amax_connections=500' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/query_cache_size=/d' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/\max_connections=/aquery_cache_size=256M' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/query_cache_type=/d' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/\query_cache_size=/aquery_cache_type=0' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/query_cache_limit=/d' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/\query_cache_type=/aquery_cache_limit=1M' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/table_cache=/d' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/\query_cache_limit=/atable_cache=256' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/thread_cache_size=/d' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/\table_cache=/athread_cache_size=4' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/innodb_flush_method=/d' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf
sed -i '/\thread_cache_size=/ainnodb_flush_method=O_DIRECT' /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf

我需要检查和设置的最后两个值是：

thread_cache_size=4
innodb_flush_method=O_DIRECT

我在一个非常标准的my.cnf文件中运行它：

[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
# Default to using old password format for compatibility with mysql 3.x
# clients (those using the mysqlclient10 compatibility package).
old_passwords=1

max_connections=500
innodb_buffer_pool_size=256M

# Disabling symbolic-links is recommended to prevent assorted security risks;
# to do so, uncomment this line:
# symbolic-links=0

[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

生成的文件如下所示：

[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
# Default to using old password format for compatibility with mysql 3.x
# clients (those using the mysqlclient10 compatibility package).
# old_passwords=1
innodb_buffer_pool_size=5G
innodb_additional_mem_pool_size=100M
innodb_file_per_table
innodb_log_file_size=125M
innodb_flush_log_at_trx_commit=1
max_connections=500
query_cache_size=256M
query_cache_type=0
query_cache_limit=1M
table_cache=256


# Disabling symbolic-links is recommended to prevent assorted security risks;
# to do so, uncomment this line:
# symbolic-links=0

[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

我已经尝试删除thread_cache_size =命令并替换为其他的，随机的，更新的但仍然失败，好像对于my.cnf文件的编辑距离有一些限制。

Answer 1

\t在sed中有特殊含义：它代表制表符。因此，/\table_cache/永远不会匹配。

Answer 2

从shell的角度来看，使用这个sed并不是更好（并且最好将t文件用作动作列表）

sed -i 's/".*old_passwords=[0-9]*"/"# old_passwords=1"/g
   /innodb_buffer_pool_size=/d
   /\old_passwords=/ainnodb_buffer_pool_size=5G
   /innodb_additional_mem_pool_size=/d
   /\innodb_buffer_pool_size=/ainnodb_additional_mem_pool_size=100M
   /innodb_file_per_table/d
   /\innodb_additional_mem_pool_size=/ainnodb_file_per_table
   /innodb_log_file_size=/d
   /\innodb_file_per_table/ainnodb_log_file_size=125M
   /innodb_flush_log_at_trx_commit=/d
   /\innodb_log_file_size=/ainnodb_flush_log_at_trx_commit=1
   /max_connections=/d
   /\innodb_flush_log_at_trx_commit=/amax_connections=500
   /query_cache_size=/d
   /\max_connections=/aquery_cache_size=256M
   /query_cache_type=/d
   /\query_cache_size=/aquery_cache_type=0
   /query_cache_limit=/d
   /\query_cache_type=/aquery_cache_limit=1M
   /table_cache=/d
   /\query_cache_limit=/atable_cache=256
   /thread_cache_size=/d
   /\table_cache=/athread_cache_size=4
   /innodb_flush_method=/d
   /\\thread_cache_size=/ainnodb_flush_method=O_DIRECT'  /home/david/systems/zabbix/2.2/2.2.5/confs/my.cnf

sed无法匹配，删除然后插入

2 个答案: