首先执行命令: tail -f /var/log/syslog 然后插入有问题的U盘,tail会打印一些log: Jan :: zkw- kernel: [-: new high-speed USB device number using xhci_hcd Jan :: zkw- kernel: [-: New USB device found, idVendor=, idProduct= Jan :: zkw- kernel: [-: New USB device strings: Mfr=,
用 vim 打开没有写权限的文件而忘记用 sudo 时,文件变成 read-only这时候用 :w!, SHIFT+ZZ,或者 qw! 都无法保存 :w !sudo tee % :w : Write a file.可以将文件写入,文件仍然是只读模式,通过 :q! 退出 !sudo : Call shell sudo command. tee : The output of the vi/vim write command is redirected using tee. % : Triggers
mysql> set global read_only=0; Query OK, 0 rows affected (0.00 sec) mysql> show variables like '%read_only%'; +------------------+-------+ | Variable_name | Value | +------------------+-------+ | innodb_read_only | OFF | | read_only | OFF | | tx_rea
org.springframework.dao.InvalidDataAccessApiUsageException: Write operations are not allowed in read-only mode (FlushMode.NEVER/MANUAL): Turn your Session into FlushMode.COMMIT/AUTO or remove 'readOnly' marker from transaction definition.问题:只读模式下(Flu
在MySQL数据库中,在进行数据迁移和从库只读状态设置时,都会涉及到只读状态和Master-slave的设置和关系. 经过实际测试,对于MySQL单实例数据库和master库,如果需要设置为只读状态,需要进行如下操作和设置: 将MySQL设置为只读状态的命令:# mysql -uroot -pmysql> show global variables like "%read_only%";mysql> flush tables with read lock;mysq
org.springframework.dao.InvalidDataAccessApiUsageException: Write operations are not allowed in read-only mode (FlushMode.NEVER/MANUAL): Turn your Session into FlushMode.COMMIT/AUTO or remove 'readOnly' marker from transaction definition. 问题:只读模式下(Fl